REVIEWED BLD2021-1033+Manufacturer_Specifications_and_Installation_Instructions+7.26.2021_10.37.52_AM+2320929Installation Instructions
NOTE: Read the entire instruction manual before starting the
installation.
TABLE OF CONTENTS
PAGE
SAFETY CONSIDERATIONS . . ...................... l
INTRODUCTION ............. . ............. ...... 1
HEAI'ER PACKAGES ............. . ................ 2
INSTALLATION ................................... 2
Step 1— Check Equipment . ........... . .. . ......... 2
Step 2 — Mount Unit , .. , ...... .... . .......... 2
Step 3 — Air Ducts .............. . ................ 4
Step 4 — Electrical Connections .............. . ...... 4
Step 5 — Refrigerant Tubing Connection and Evacuation .. 7
Step 6 — Refrigerant Flow -Control Device ............. .
Step 7—Condensate Drains ... . . . ............. . ... 7
Step 8 — Accessories . ... ....... . ..... . ....... . . .. 8
Step 9 — Sequence of Operation ..................... 8
START-UP PROCEDURES ......... ............ . ... 9
CARE AND MAINTENANCE ...... . .. . . . ........ , ... 9
AIRFisOW PERFORMANCE TABLES .... . ........... . 9
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service, maintenance,
or use can cause explosion, fire, electrical shock, or other
conditions which may cause death, personal injury or property
damage. Consult a qualified installer, service agency, or your
distributor or branch for information or assistance, The qualified
installer or agency must use factory -authorized kits or accessories
when modifying this product. Refer to the individual instructions
packaged with kits or accessories when installing.
Follow all safety codes. Wear safety glasses, protective clothing
and work gloves. Have afire extinguisher available. Read these
instructions thoroughly and follow all warning,, or cautions
included in literature and attached to the unit. Consult local
building codes and the current editions of the National Electrical
Code (NEC) NFPA 70,
In Canada, refer to the current editions of the Canadian Electrical
Code CSA C22.1,
Recognize safety information, This is the safety -alert symbol J�
When you see this symbol on the unit and in instruction manuals,
be alert to the potential for personal injury.
Understand the signal words DANGER. WARNING. and
CAUTION. These words are used with the safety -alert symbol.
DANGER identifies the most serious hazards which will result in
severe personal injury or death. WARNING signifies hazards
which could result in personal injury or death. CAUTION is used
to identify unsafe practices which mat' result in minor personal
injury or product and property damage. NOTE is used to highlight
stisgagestions which will result in enhanced installation, reliability, or
operation.
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal injury
or death.
Before installing or servicing unit, always turn off all power to
unit, There may be snore than one disconnect switch, Turn off
accessory heater power if applicable. Lock out and tag switch
with a suitable warning ]abet.
CUT HAZARD
Failure to follow this caution may result in personal injury.
Sheet metal parts may havesharp edges or burrs. Use care and
wear appropriate protective clothing and doves when
handling parts.
INTRODUCTION
F134C and FX413 models are R-410A Fan Coils designed for
installation flexibility. These units leave the factory compliant with
low leak requirements of less than 2%¢ cabinet leakage rate at 0.5
inches W.C. and 1.4% cabinet leakage rate at 0.5 inches W.C. when
tested in accordance with ASHRAE 193 standard.
FB4CNF(018-048) uses a refrigerant piston metering device. A
TXV is used on FB4CNP and FX413(018-061)_ All these fan coils
use a multi -tap ECM motor for efficiency. The units have tie
designed for upflow, downflow (kit required_), and horizontal
orientations, including manufactured and mobile home
applications,
These units require a field supplied air filter, and are designed
specifically for R-410A refrigerant air conditioner% and heat
pumps as shipped. These units ;ire available for systems iif I8.000
through 60,000 BTUh nominal cooling capacity. Factory
-
authorized, field - installed electric heater packages are available in
sizes 5 through 30kW. Sec Product Data literature for all available
accessory, kits.
HEATER PACKAGES
B. Downflow Installation
This unit may or may not be equipped with an electric heater
package. For units not equipped with factory —installed heat, a
factory —approved, field —installed, UL listed heater package is
available from your equipment supplier. See unit rating plate for a
list of factory —approved heaters. Heaters that are not factory
approved could cause damage which would not be covered under
the equipment warranty. If fan coil contains a factory —installed
heater package, minimum circuit ampacity (MCA) and maximum
fuse/breaker may be different than units with a same size
field —installed accessory heater. The differences is not an error and
is due to calculation difference per UL guidelines.
INSTALLATION
Step 1— Check Equipment
Unpack unit and move to final location. Remove carton taking care
not to damage unit. Inspect equipment for damage prior to
installation. File claim with shipping company if shipment is
damaged or incomplete.
NOTE: If the door gasket is damaged or missing, the unit may not
meet the ASHRAE 193 standard for cabinet air leakage. Contact
your supplier and order kit #344994-75 L
Locate unit rating plate which contains proper installation
information. Check rating plate to be sure unit matches job
specifications.
Step 2 — Mount Unit
Unit can stand or lie on floor, or hang from ceiling or wall. Allow
space for wiring, piping, and servicing unit.
IMPORTANT: When unit is installed over a finished ceiling
and/or living area, building codes may require a field —supplied
secondary condensate pan to be installed under the entire unit.
Sonic localities may allow as an alternative, the running of a
separate, secondary condensate line. Consult local codes for
additional restrictions or precautions.
NOTE: Nuisance sweating may occur if the unit is installed in a
high humidity environment with low airflow.
A. Upflow Installation
If return air is to be ducted through a floor, set unit on floor over
opening and use 1/8 to 1/4—in (3 to 6 mm) thick fireproof resilient
gasket between duct, unit, and floor.
Side return is a field option on slope coil models. Cut opening per
dimensions. (See Fig. 1.) A field —supplied bottom closure is
required.
POWER ENTRY FIELD SUPPLIED
OPTIONS SUPPLY DUCT
LOW VOLT
ENTRY
018.048 21' (533 mm) FRONT SERVICE OPTIONS
060 - 060 24' (610mm) CLEARANCE 0
UNIT A
01 024 ,2' (305 mm
A COIL 025 - 030 17. 432 mm
UNITS 036 19" (483 mm)
UPFLOWIDOWNFLOW 0
SECONDARY DRAIN 6 1.5" (38 mm)
1 d� 19' (483 mm)
UPFLOW/DOWNFLOW
PRIMARY DRAIN
aI
I FIELD MODIFIED
I 2.5" A LOCATION FOR
(64 mm) SLOPE COIL
UNITS ONLY
V SECONDARY DRAG N Q i 1
UPFLPRIMOWNFFIELD SUPPLIED
PROW I / `RETURNPLENUM
PRIMARY GRAIN
In this application, field conversion of the evaporator is required
using accessory downflow kit along with an accessory base kit.
Use fireproof resilient gasket, 1./8 to 1/4—in (3 to 6 mm) thick,
between duct, unit, and floor.
UNIT OR PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in product or property
damage.
The conversion of the fan coil to downflow requires special
procedures for the condensate drains on both A —coil and slope
units. The vertical drains have an overflow hole between the
primary and secondary drain holes. This hole is plugged for all
applications except downflow, but must be used for downflow.
During the conversion process, remove the plastic cap
covering the vertical drains only and discard. Remove the plug
from the overflow hole and discard. At completion of the
downflow installation, caulk around the vertical pan fitting to
door joint to retain the low air leak performance of the unit.
NOTE: To convert units for downflow applications, refer to
Installation Instructions supplied with kit for proper installation.
For slope fan coils, use kit Part No. KFADCO201SLP. For A —coils,
use kit Part No. KFADC040IACL. Use fireproof resilient gasket,
1J8 to 1/4—in (3 to 6 mm) thick, between duct, unit, and floor.
NOTE: Gasket kit number KFAHD01.01SLP is also required for
all downflow applications to maintain low air Icak/low sweat
performance.
C. Horizontal Installation
Units must not be installed with access panels facing up or down.
All other units are factory built for horizontal left installation. (See
Fig. 2 and 3.) When suspending unit from ceiling, dimples in
casing indicate suitable location of screws for mounting metal
support straps. (See Fig. 2.)
For horizontal applications having high return static and humid
return air, the Water Management Kit, KFAHC0125AAA, may
need to be used to assist in water management.
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in product or property
damage.
For optimum condensate drainage performance in horizontal
installations, unit should be leveled along its length and width.
uxvvov
wr ass
At ACCC99
u�rw.ce
A07565 A07566
Fig. I — Slope Coil Unit in Upflow Application Fib. 2 — Slope Coil Unit in Horizontal Left Application
APPLICATION �' . I'
% /('S.y' /" j%E;•;�:� COIL
U SUPPORT
�`'`, / %/;G•F.'1n I HAIL
C }.+�.FT?".." >� I DRAIN PAN
SUPPORT
.� A;G1' `� • BRACKET
COIL
BRACKET
HORIZONTAL
DRAIN PAN PRIMARY GRAIN
AIR SEAL HORIZONTAL LEFT
ASSEMBLY SECONDARY DRAIN
HORIZONTAL LEFT
REFRIGERANT
CONNECTIONS
A00072
Fig. 3 — A —Coil in Horizontal Left Application
NOTE: Modular units can be disassembled and components
moved separately to installation area for reassembly. This process
accommodates small scuttle holes and limiting entrances to
installation sites. (See Fig. 4 .)
El
BLOWER BOX —�
r I
�I
z scRLws �� I
\A�- 2SCREWS
BMCKET NER
'Al SCREWS
A95293
Fig. 4 — Removal of Brackets on Modular Units Horizontal
Right Conversion of Units With Slope Coils
NOTE: Gasket kit number KFAH130101SLP is required for
horizontal slope coil conversion to maintain low air leak/low sweat
performance.
1. Remove blower and coil access panel and fitting panel. (See
Fig. 5.)
2. Remove coil mounting screw securing coil assembly to
right side casing flange.
3. Remove coil assembly.
4. Lay fan coil unit on its right side and reinstall coil assembly
with condensate pan down. (See Fig. 5.)
5. Attach coil to casing flange using coil mounting screw pre-
viously removed.
6. Make sure the pan cap in the fitting door is properly seated
on the fitting door to retain the low air leak rating of the
unit.
7. Add gaskets from kit KFAHD per kit instructions.
S. Align holes with tubing connections and condensate pan
connections, and reinstall access panels and fitting panel.
Make sure liquid and suction tube grommets are in place to prevent
air leaks and cabinet sweating. Install after brazing.
CO
SUPPOF
RA
SLOPE
A03001
Fig. 5 — Conversion for Horizontal Right Applications
Horizontal Right Conversion of Units With A —Coils
1. Remove blower and coil access panels. (See Fig. 6.)
AIR SEAL
ASSEMBLY
COIL
SUPPORT
RAIL
COIL
BRACKET
BRACKET
PRIMARY DRAIN
HORIZONTAL RIGHT
SECONDARY DRAIN
HORIZONTAL RIGHT
HORIZONTAL
RIGHT
APPLICATION
A00071
Fig. 6 — Conversion for Horizontal Right Applications
Using A —Coil
2. Remove metal clip securing fitting panel to condensate pan.
Remove fitting panel.
3. Remove 2 snap —in clips securing A —coil in unit.
4. Slide coil and pan assembly out of unit.
5. Remove horizontal drain pan support bracket from coil sup-
port rail on left side of unit and reinstall on coil support rail
on right side of unit. (See Fig. 7.)
DRAWPAN
SUPPDRTBFU M
Fig. 7 — Drain Pan Support Bracket
A07571
3
6. Convert air —seal assembly for horizontal right.
a. Remove air —seal assembly from coil by removing 4
screws. (See Fig. 6.)
b. Remove air splitter (B)from coil seal assembly by remov-
ing 3 screws. (See Fig. 3—factory shipped inset.)
c. Remove filter plate (A) and install air splitter (B) in place
of filter plate.
d. Install filter plate (A) as shown in horizontal right applica-
tion.
e. Remove condensate troughs (C) and install on opposite
tube sheets.
f. Install hose onto plastic spout.
7. Install horizontal pan on right side of coil assembly.
8. Slide coil assembly into casing. Be sure coil bracket on each
corner of vertical pan engages coil support rails.
9. Reinstall 2 snap —in clips to correctly position and secure
coil assembly in unit. Be sure clip with large offsets is used
on right side of unit to secure horizontal pan.
10. Remove two oval fitting caps from the left side of the coil
door and fitting panel.
11. Remove insulation knockouts on right side of coil access
panel.
12. Remove 2 oval coil access panel plugs and reinstall into
holes on left side of coil access panel and fitting panel.
13. Install condensate pan fitting caps (from item .10) in the
right side of the coil door making sure that the cap snaps
and seats cleanly on the back side of the coil door. Make
sure no insulation interferes with seating of the cap.
14. Reinstall access fitting panels, aligning holes with tubing
connections and condensate pan connections. Be sure to re-
install metal clip between fitting panel and vertical conden-
sate pan.
Make sure liquid and suction tube grommets are in place to prevent
air leaks and cabinet sweating.
D. Manufactured and Mobile Home Housing Applications
1. Fan coil unit must be secured to the structure using field —
supplied hardware.
2. Allow a minimum of 24—in (610 mm) clearance from access
panels.
3. Recommended method of securing for typical applications:
a. If fan coil is away from wall, attach pipe strap to top of fan
coil using no. 10 self —tapping screws. Angle strap down
and away from back of fan coil, remove all slack, and fasten
to wall stud of structure using 5/16—in. lag screws. Typical
both sides of fan coil.
4" (102mm) MAX
SECURE FAN COILTO STRUCTURE
UNIT AWAY FROM WALL
PIPE STRAP
(TYPICAL BOTH SIDES)
OR
UNIT AGAINST WALL
125" (3mm)
MOUNTING BRACKET
(TYPICAL BOTH SIDES)
DOWN FLOW
BASE KIT (KFACB)
:CURE UNIT TO FLOOR
JGLE BRACKET OR PIPE STRAP
r1
4' (102mm) MAX
A07567
Fig. 8 — A —Coil
b. if fan coil is against wall, secure fan coil to wall stud using
1/8—in (3 mm) thick right—angle brackets. Attach brackets
to fan coil using no. 10 self —tapping screws and to wall stud
using 5/:16—in. lag screws. (See Fig. 8.)
Step 3 — Air Ducts
Connect supply —air duct over the outside of 3/4—in (19 mm)
flanges provided on supply —air opening. Secure duct to flange,
using proper fasteners for type of duct used, and seal duct —to —unit
joint. If return —air flanges are required, install factory —authorized
accessory kit.
Use flexible connectors between ductwork and unit to prevent
transmission of vibration. When electric heater is installed, use
heat —resistant material for flexible connector between ductwork
and unit at discharge connection. Ductwork passing through
unconditioned space must be insulated and covered with vapor
barrier.
Units equipped with 20-30kW electric heaters require a ]—in (25
mm) clearance to combustible materials for the first 36—in (914
mm) of supply duct.
Ductwork Acoustical Treatment
Metal duct systems that do not have a 90' elbow and 1.0—ft (3m) of
main duct to first branch takeoff may require internal acoustical
insulation lining. As an alternative, fibrous ductwork may be used
if constructed and installed in accordance with the latest edition of
SMACNA construction standard on fibrous glass ducts. Both
acoustical lining and fibrous ductwork shall comply with National
Fire Protection Association as tested by UL Standard 181 for Class
1 air ducts.
Step 4 — Electrical Connections
FB4C units from the factory protect the low voltage circuit with a 3
amp automotive type fuse in —line on the wire harness and Does
Not contain a circuit board. Motor speeds and time delay function
are built into the motor (see section E for clarification).
When a factory —approved accessory control package has been
installed, check all factory wiring per unit wiring diagram and
inspect factory wiring connections to be sure none were loosened
in transit or installation. If a different control package is required,
see unit rating plate.
FAN COIL
THERMOSTAT (CONTROL)
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in product or
property damage.
It' a disconnect switch is to be mounted on unit, select a
location where drill or fastener will not contact electrical or
refrigerant components.
Before proceeding with electrical connections. make certain that
supply voltage, frequency, phase, and ampacity are as specified on
the unit rating plate. See unit wiring label for proper field high —
and low —voltage wiring. Make all electrical connections in
accordance with the NEC and any local codes or ordinances that
may apply. Use copper wire only.
The unit must have a separate branch electric circuit with a
field —supplied disconnect switch located within sight from, and
readily accessible from, the unit.
On units with a factory —installed disconnect with pull—out
removed, service and maintenance can be safely performed on only
the load side of the control package.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
Field wires on the line side of the disconnect found in the fan
coil unit remain live, even when the pull—out is removed.
Service and maintenance to incoming wiring cannot be
performed until the main disconnect switch (remote to the
unit) is turned off.
A. Line Voltage Connections
If unit will contain accessory electric heater, remove and discard
power plug from fan coil and connect male plug from heater to
female plug from unit wiring harness. (See Electric Heater
Installation Instructions.)
For units without electric heater:
1. Connect 203/230v power leads from field disconnect to yel-
low and black stripped leads.
2. Connect ground wire to unit ground lug.
NOTE: Units installed without electric heat should have a
field —supplied sheet metal block —off plate covering the heater
opening. This will reduce air leakage and formation of exterior
condensation.
B. 24—v Control System
Connection To Unit
Wire low voltage in accordance with wiring label on the blower.
(See Fig. 9 through 12.) Use no. IS AWG color —coded, insulated
(35°C minimum) wire to make the low —voltage connections
between the thermostat. the unit, and the outdoor equipment. If the
thermostat is located more than 100—ft (30 m) from the unit (as
measured along the low —voltage wire), use no. 16 AWG
color —coded, insulated (35°C minimum) wire. All wiring must be
NEC Class 1 and must be separated from incoming power leads.
R
GRY
G G
W HT
WHT A -I wp
]EIRN
W3
E
C AIR COND.
C
Y
A94058
Fig. 9 — Wiring Layout Air Conditioning Unit
(Cooling Only)
FAN COIL
THERMOSTAT (CONTROL)
AIR COND.
A94059
Fig. 10 — Wiring Layout Air Conditioning Unit
(Cooling and 1—Stage Heat)
FAN COIL
THERMOSTAT (CONTROL) HEAT PUMP
r-I r----- 1 (CONTROL)
A94060
Fig. 11 — Wiring Layout Heat Pump Unit (Cooling and
2—Stage Heat with No Outdoor Thermostat)
THERMOSTAT FAN COIL HEAT PUMP
(CONTROL) (CONTROL)
A03088
Fig. 12 — Wiring Layout Heat Pump Unit
(Cooling and 2—Stage Heat for Manufactured Housing)
5
Refer to outdoor unit wiring instructions for any additional wiring
procedure recommendations.
Transformer Information
Transformer is factory —wired for 230v operation. For 208v
applications, disconnect the black wire from the 230v terminal on
transformer and connect it to the 208v terminal. (See Fig. 1.3.)
A05182
Fig. 13 — Transformer Connections
Heater Staging
If electric heat staging is required, a multi —stage heating room
thermostat is required. Consult your equipment supplier for a
suitable thermostat.
C. Manufactured Housing
In manufactured housing applications, the Code of Federal
Regulations, Title 24. Chapter XX, Part 3280.714 requires that
supplemental electric heat be locked out at outdoor temperatures
above 40°F (4°C), except for a heat pump defrost cycle. Refer to
Fig. 12 for typical low voltage wiring with outdoor thermostat.
D. Ground Connections
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
According to NEC, ANSI/NFPA 70, and local codes, the
cabinet must have an uninterrupted or unbroken ground to
minimize personal injury if an electrical fault should occur.
The ground may consist of electrical wire or metal conduit
when installed in accordance with existing electrical codes. If
conduit connection uses reducing washers, a separate ground
wire must be used.
NOTE: Use UL—listed conduit and conduit connector for
connecting supply wire(s) to unit to obtain proper grounding.
Grounding may also be accomplished by using grounding lugs
provided in control box.
E. Minimum CFM and Motor Speed Selection
The fan speed selection is done at the motor connector. Units with
or without electric heaters require a minimum CFM. Refer to the
unit wiring label to ensure that the fan speed selected is not lower
than the minimum fan speed indicated.
Tap 1
Low
90 sec off delay
Tap 2
Medium
90 sec off delay
Tap 3
High
90 sec off delay
Tap 4
Electric heat t
0 sec off delay
Tap 5
Max t
0 sec off delay
t electric heat airflow is same CFM as Tap 3, except 0 sec off delay
* high static applications, see airflow tables for max airflow
To change motor speeds disconnect the BLUE fan lead from motor
connector terminal #2 (factory default position) and move to
desired speed -tap; 1, 2, 3, or 5.
Speed -taps 1, 2, and 3 have a 90 second blower off time delay
pre-programmed into the motor. Speed -tap 4 is used for electric
heat only (with 0 second blower time delay) and the WHITE wire
should remain on tap 4. Speed -tap 5 is used for high static
applications, but has a 0 second blower time delay
pre-programmed into the motor. See Airflow Performance tables
for actual CFM. Also, see Fig. 14 for motor speed selection
location.
NOTE: In low static applications, lower motor speed tap should
be used to reduce possibility of water being blown off coil.
[D 13 0 Oil 0 D cl
m
i
Speed Taps may be located on motor,
or on plug close to motor.
Fig.14 — Motor Speed Selection
Step 5 — Refrigerant Tubing Connection and
Evacuation
Use accessory tubing package or field —supplied tubing of
refrigerant grade. Suction tube must be insulated. Do not use
damaged, dirty, or contaminated tubing because it may plug
refrigerant flow —control device. ALWAYS evacuate the coil and
field —supplied tubing to 500 microns before opening outdoor unit
service valves.
PRODUCT DAMAGE HAZARD
Failure to follow this caution may result in product or
property damage.
A brazing shield MUST be used when tubing sets are being
brazed to the unit connections to prevent damage to the unit
surface and condensate pan fitting caps.
Units have sweat suction and liquid tube connections. Make
suction tube connection first.
Cut tubing to correct length.
2. Insert tube into sweat connection on unit until it bottoms.
3. Braze connection using silver bearing or non —silver bearing
brazing materials. Do not use solder (materials which melt
below 800°F / 427°C). Consult local code requirements.
4. Evacuate coil and tubing system to 500 microns using deep
vacuum method.
PRODUCT DAMAGE HAZARD
Failure to follow this caution may result in product or
property damage.
Wrap a wet cloth around rear of fitting to prevent damage to
piston assembly or TXV and factory —made joints.
Step 6 — Refrigerant Flow —Control Device
FB4CNF mots contain a factory installed piston with Teflon ring
for sizes 018 thru 048 only. The FB4CNP and FX41)(018-061)
size units come equipped with a R-410A refrigerant TXV. If a
piston replacement is required, check piston size shown on indoor
unit rating plate to see if it matches required outdoor piston size.
The outdoor piston size will be found on the outdoor unit rating
plate, product data or installation instructions depending on the
model. If the fan coil piston does not match, replace indoor piston
with correct outdoor piston. With some outdoor units a piston is
shipped with outdoor unit; if no piston is shipped with the outdoor
unit one can be ordered from Replacement Components. When
changing piston, use a back—up wrench. (See Fig. 15). Hand
tighten hex nut, then tighten with wrench 1/2 turn. Do not exceed
30 ft—lbs.
BRASS
HEX NUT TEFLON SEAL
DISTRIBUTOR
ftRETAINER
FLON RING
ULF
STON
OW IN
OOLING
BRASS
HEX BODY
STRAINER
A09677
Fig. 15 — Refrigerant Flow — Control Device
NOTE: The indoor piston contains a Teflon ring (or seal) which is
used to seat against the inside of distributor body, and must be
installed properly to ensure proper seating in the direction for
cooling operation.
Always use outdoor units designed to match indoor fan coil
applications.
PRODUCT OPERATION HAZARD
Failure to follow this caution may result in improper product
operation.
If using a TXV in conjunction with a single—phase
reciprocating compressor, a compressor start capacitor and
relay are required. Consult outdoor unit pre —sale literature for
start assist kit part number.
Step 7 — Condensate Drains
To connect drains, the cap openings must be removed. Use a knife
to start the opening near the tab and using pliers, pull the tab to
remove the disk. Clean the edge of the opening if necessary and
install the condensate line. Finally caulk around the lines where
they exit the fitting to retain the low leak rating of the unit.
UNIT OR PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in product or
property damage.
The conversion of the fan coil to downflow requires special
procedures for the condensate drains on both A —coil and
slope units. The vertical drains have an overflow hole
between the primary and secondary drain holes. This hole is
plugged for all applications except downflow, but must be
used for downflow. During the conversion process, remove
the plastic cap covering the vertical drains only and discard.
Remove the plug from the overflow hole and discard. At
completion of the downflow installation, caulk around the
vertical pan fitting to door joint to retain the low air leak
performance of the unit.
Units are equipped with primary and secondary 3/4—in. FPT drain
connections. For proper condensate line installations see Fig. 1, 2,
3, 5 and 6. To prevent property damage and achieve optimum
drainage performance, BOTH primary and secondary drain lines
should be installed and include properly —sized condensate traps.
(See Fig. 16 and 17.) Factory —approved condensate traps are
available. It is recommended that PVC fittings be used on the
plastic condensate pan. Finger —tighten plus 1-1/2 turns. Do not
over —tighten. Use pipe dope.
Fig. 16 — Recommended Condensate'll-ap
A03002
N
Z`- FILTER
ACCESS
PANEL
SECONDARY DRAIN WITH
APPROPRIATE TRAP REQUIRED
(USE FACTORY KIT OR
FIELD -SUPPLIED TRAP)
PRIMARY TRAP REQUIRED
(USE FACTORY KIT OR
FIELD -SUPPLIED TRAP OF
SUFFICIENT DEPTH.
STANDARD P-TRAPS ARE
NOT SUFFICIENT. SEE
FIGURE OF RECOMMENDED
CONDENSATETRAP)
A03003
Fig.17 — Condensate Trap and Unit
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in product or
property damage.
Shallow running traps are inadequate and DO NOT allow
proper condensate drainage. (See Fig. 18.)
DO NOT USE SHALLOW RUNNING TRAPS!
A03013
Fig. IS — Insufficient Condensate Trap
NOTE: When connecting condensate drain lines, avoid blocking
filter access panel, thus preventing filter removal. After connection,
prime both primary and secondary condensate traps.
NOTE: if unit is located in or above a living space where damage
may result from condensate overflow, a field —supplied, external
condensate pan should be installed underneath the entire unit, and a
secondary condensate line (with appropriate trap) should be run
from the unit into the pan. Any condensate in this external
condensate pan should be drained to a noticeable place. As an
alternative to using an external condensate pan, some localities
may allow the use of a separate 3/4—in (19 mm) condensate line
(with appropriate trap) to a place where the condensate will be
noticeable. The owner of the structure must be informed that when
condensate flows from the secondary drain or external condensate
pan, the unit requires servicing or water damage will occur.
Install traps in the condensate lines as close to the coil as possible.
(See Fig. 17.) Make sure that the outlet of each trap is below its
connection to the condensate pan to prevent condensate from
overflowing the drain pan. Prime all traps, test for leaks, and
insulate traps if located above a living area. Condensate drain lines
should be pitched downward at a minimum slope of 1—in (25 mm)
for every 10—ft (3 m) of length. Consult local codes for additional
restrictions or precautions.
Step 8 — Accessories
Humidifier
Connect humidifier and humidistat to fan coil unit as shown in Fig.
19 and Fig. 20. The cooling lockout relay is optional.
Step 9 — Sequence of Operation
A. Continuous Fan
Thermostat closes R to G. G energizes fan relay on PCB which
completes circuit to indoor blower motor. When G is de —energized,
there is a 90—sec delay before relay opens.
B. Cooling Mode
Thermostat energizes R to G, R to Y, and R to O (heat pump only).
G energizes fan relay on PCB which completes circuit to indoor
blower motor. When G is de —energized, there is a 90—sec delay
before fan relay opens.
C. Heat Pump Heating with Auxiliary Electric Heat
Thermostat energizes R to G, R to Y, and R to W. G energizes fan
relay on PCB which completes circuit to indoor blower motor. W
energizes electric heat relay(s) which completes circuit to heater
element(s). When W is de —energized, electric heat relay(s) open,
turning off heater elements. When G is de —energized there is a
90—sec delay before fan relay opens.
D. Electric Heat or Emergency Heat Mode
Thermostat closes R to W. W energizes electric heat relay(s) which
completes circuit to heater element(s). Blower motor is energized
through normally closed contacts on fan relay. When W is
de —energized, electric heat relay(s) opens.
FAN COIL
THERMOSTAT (CONTROL)
m
HEAT PUMP
(CONTROL)
A95294
Fig. 19 — Wiring Layout of Humidifier to Heat Pump
FAN COIL
THERMOSTAT (CONTROL)
RED R
GRY G
tBLU
W2
W
3
V10 E
BRN C
Y
HUMIDISTAT
FAN HUMIDIFIER
115V M
AIR COND.
t4t
Y
A95295
Fig. 20 - Wiring Layout of humidifier to Fan Coil
With Electric Heat
START-UP PROCEDURES
Refer to outdoor unit Installation Instructions for system start-up
instructions and refrigerant charging method details.
UNIT COMPONENT HAZARD
Failure to follow this caution may result in product damage.
Never operate unit without a filter. Damage to blower motor
or coil may result. Factory authorized filler kits must be used
when locating the filter inside the unit. For those applications
where access to an internal filter is impractical, a
field -supplied filter must be installed in the return duct
system.
CARE AND MAINTENANCE
To continue high performance and minimize possible equipment
failure, it is essential that periodic maintenance be performed on
this equipment. Consult your local dealer as to the proper
frequency of maintenance contract.
The ability to properly perform maintenance on this equipment
requires certain mechanical skills and tools. if you do not possess
these, contact your dealer for maintenance. The only consumer
service recommended or required is filter replacement or cleaning
on a monthly basis.
AIRFLOW PERFORMANCE TABLES
Table l - Air Delivery Performance Correction Component Pressure Drop (in. wc) at Indicated Airflow (Dry to Wet Coil)
CFM
UNIT SIZE
500
600
700
800
900
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
018.019
0.034
0.049
0.063
--
__
--
--
--
--
--
--
__
--
--
--
__
024
0.034
0.049
0.063
0.076
0.089
- -
- -
- -
- -
- -
- -
- -
- -
- -
025
0.015
0.026
0.038
0.049
0.059
--
--
--
--
--
__
--
--
--
--
-
030.031
--
--
--
0.049
0.059
0.070
0.080
--
--
--
--
--
--
__
--
--
036
_ _
0.070
0.080
0.090
0.099
- -
- -
037
_ _
_ _
0.055
0.064
0.073
0.081
_ _
_ _
042.043
- _
- -
0.049
0.056
0.063
0.070
048
- -
- _
_ _
_ _
_
_ _
_ _
_ _
_ _
0.063
0.070
0.076
0.083
0.090
-
049
__
__
__
__
__
__
__
__
__
0.038
0.043
0.049
0.054
0.059
__
060
_ _
- _
_ _
_ _
_ _
_ _
_ _
_ _
_
_ _
0.049
0.054
0.059
0.065
0.070
061
-
--
--
--
--
-
--
--
--
--
0027
0.031
0.035
0.039
0.043
Table 2 - Factory -Installed Filter Static Pressure Drop (in. we)
SIZE CFM
400 600 800 1000 1200 1400 1600 1800 2000
018,019 0.020 0.044 0.075 - - - - - -
024- 031 - 0.022 0.048 0.072 0.100 - - - -
036-049 - - - 0.051 0.070 0.092 0.120 0.152 -
060, 061 - - - - - - 0.086 0.105 0.130
Table 3 - Electric Heater Static Pressure Drop (in. we)
Sizes 018 - 037
Sizes 042 - 061
HEATER
EXTERNAL STATIC
HEATER
EXTERNAL STATIC
ELEMENTS
kW
PRESSURE
ELEMENTS
kW
PRESSURE
CORRECTION
CORRECTION
0
0
+.02
0
0
+.04
1
3,5
+.01
2
8,10
+.02
2
8,10
0
3
9,15
0
3
9,15
-.02
4
20
-.02
4
20
-.04
6
18, 24, 30
-.10
9
AIRFLOW PERFORMANCE TABLES (cont)
Table 4 — FI34C Airflo.v Performance (CFM)
BLOWER
MODEL & SIZE
SPEED
0.10
0.20
0.30
0.40
0.50
0.60
Tap 5
767
739
702
669
620
565
Tap 4
614
569
534
486
436
398
FB4C 018
Tap 3
701
660
616
581
537
499
Tap 2
614
569
534
486
436
398
Tap
410
350
304
261
228
203
Tap 5
969
936
892
835
763
676
Tap 4
826
795
766
743
706
660
FB4C 024 / 025
Tap 3
826
795
766
743
706
660
Tap 2
701
660
616
581
537
499
Tap
617
592
552
507
472
420
Tap 5
1108
1090
1065
1034
1009
974
Tap 4
1026
1000
969
938
899
865
FB4C 030
Tap 3
1026
1000
969
938
899
865
Tap 2
909
873
842
799
762
724
Tap
825
795
757
722
674
634
Tap 5
1301
1276
1245
1218
1176
1121
Tap 4
1227
1191
1169
1143
1105
1074
F64C 036
Tap 3
1227
1191
1169
1143
1105
1074
Tap 2
1087
1062
1030
1001
966
930
Tap
1026
1000
969
938
899
865
Tap 5
1560
1544
1507
1464
1424
1358
Tap 4
1419
1397
1358
1320
1279
1239
FB4C 042
Tap 3
1419
1397
1358
1320
1279
1239
Tap 2
1249
1220
1184
1142
1093
1052
Tap
1242
1205
1158
1110
1069
1026
Tap 5
1743
1712
1679
1642
1610
1574
Tap 4
1669
1634
1599
1564
1531
1499
FB4C 048
Tap 3
1669
1634
1599
1564
1531
1499
Tap 2
1452
1413
1377
1339
1308
1271
Tap 1
1300
1256
1221
1182
1142
1101
Tap 5
1897
1867
1836
1808
1774
1736
Tap 4
1817
1785
1757
1724
1693
1655
FB4C 060
Tap 3
1817
1785
1757
1724
1693
1655
Tap 2
1657
1621
1589
1557
1518
1474
Tap
1443
1412
1377
1332
1286
1243
Tap 5
2030
1995
1961
1927
18BB
1842
Tap 4
1811
1775
1740
1703
1664
1613
FB4C 061
Tap 3
1811
1775
1740
1703
1664
1613
Tap 2
1665
1632
1593
1556
1507
1453
Tap
1462
1418
1371
1327
1278
1228
Shading — Airflow outside 450 cfm/ton.
NOTES:
1. Airflow based upon dry coil at 230v with factory —approved filter and electric heater (2 element heater sizes 018 through 036, 3 element
heater sites 042 through 061.).
2. For FB4C models, airflow at 208 volts is approximately the same as 230 volts because the multi —tap ECM motor is a constant torque
motor. The torque doesn't drop off at the speeds the motor operates.
3. To avoid potential for condensate blowing out of drain pan prior to making drain trap:
Return static pressure must be less than 0.40 in. we.
Horizontal applications of 042 — 061 sizes must have supply static greater than 0.20 in. wc.
4. Airflow above 400 cfm/ton on 048-061 size could result in condensate blowing off coil or splashing out of drain pan.
AIRFLOW PERFORMANCE TABLES (coat)
Table 5 — FX4D Airflow Performance (CFM)
MODEL &
BLOWER
EXTERNAL STATIC (in. wc)
SIZE
SPEED
0.10
0.20
0.30
0.40
0.50
0.60
Tap 5
- _ 776 __.
-745 _._.
... 696
660
609
572
Tap 4
_
683
- --- - -
644
-
589
548
494
461
FX4D 019
Tap 3
683
644
589
548
494
461
Tap 2
631
563
500
443
409
361
Tap
625
524
457
417
367
319
Tap 5
956
920
891
851
816
780
Tap 4
825
795
757
722
674
634
FX4D 025
Tap 3
825
795
757
722
674
634
Tap 2
726
695
635
598
543
509
Tap
631
563
500
443
409
361
Tap 5
f^ 1189 --
1151
1104
1050
1003
959
Tap 4
1041
998
944
886
837
772
FX4D 031
Tap 3
1041
998
944
886
837
772
Tap 2
924
876
817
752
704
660
Tap
779
693
628
571
526
476
Tap 5
1363
1332
1294
1253
1207
1157
Tap 4
1237
1206
1160
1121
1070
1013
FX4D 037
Tap 3
1237
1206
1160
1121
1070
1013
Tap 2
1095
1058
1007
951
888
824
Tap
1014
885
773
673
609
549
Tap 5
1519
1490
1454
1419
1379
1332
Tap 4
1437
1403
1366
1333
1294
1245
FX4D 043
Tap 3
1437
1403
1366
1333
1294
1245
Tap 2
1257
1226
1191
1141
1090
1033
Tap
1237
1206
1160
1121
1070
1013
Tap 5
1757
1725
1693
1653
1614
1576
Tap 4
1664
1626
1593
1552
1517
1477
FX4D 049
Tap 3
1664
1626
1593
1552
1517
1477
Tap 2
1459
1420
1379
1336
1298
1259
Tap
1301
1241
1195
1150
1102
1039
Tap 5
2030
1995
1961
1927
1888
1842
Tap 4
1811
1775
1740
1703
1664
1613
FX4D 061
Tap 3
1811
1775
1740
1703
1664
1613
Tap 2
1665
1632
1593
1556
1507
1453
Tap 1
1462
1418
1371
1327
1278
1228
— Shading — Airflow outside 450 cfmlton.
NOTES:
1. Airflow based upon dry coil at 230v with factory —approved filter and electric heater (2 element heater sizes 019 through 037, 3 element
heater sizes 043 through 061).
2. For FX4D models, airflow at 208 volts is approximately the same as 230 volts because the multi —tap ECM motor is a constant torque
motor. The torque doesn't drop off at the speeds the motor operates.
3. To avoid potential for condensate blowing out of drain pan prior to making drain trap:
Return static pressure must he less than 0.40 in. we.
Horizontal applications of 043 — 061 sizes must have supply static greater than 0.20 in. we.
4. Airflow above 400 cfm/ton on 049-061 size could result in condensate blowing off coil or splashing out of drain pan.
R-410A QUICK REFERENCE GUIDE
• R-410A refrigerant operates at 50-70 percent higher pressures than R-22. Be sure that servicing equipment and replacement
components are designed to operate with R-410A refrigerant.
• R-410A refrigerant cylinders are rose colored.
• Recovery cylinder service pressure rating must be 400 prig, DOT 4BA400 or DOT BW400.
• R-410A refrigerant systems should be charged with liquid refrigerant. Use a commercial type metering device in the manifold
hose when charging into suction line with compressor operating
• Manifold sets should be 700 prig high side and 180 psig low side with 550 prig low —side retard.
• Use hoses with 700 psig service pressure rating.
• Leak detectors should be designed to detect HFC refrigerant.
• R-410A refrigerant, as with other HFCs, is only compatible with POE oils.
• Vacuum pumps will not remove moisture from oil.
• Do not use liquid —line filter driers with rated working pressures less than 600 psig.
• Do not leave R-410A refrigerant suction line filter driers in line longer than 72 hours.
• Do not install a suction —line filter drier in liquid line.
• POE oils absorb moisture rapidly. Do not expose oil to atmosphere.
• POE oils may cause damage to certain plastics and roofing materials.
• Wrap all titter driers and service valves with wet cloth when brazing.
• A factory approved liquid —line filter drier is required on every unit.
• Do NOT use an R-22 TXV.
• If indoor unit is equipped with a R-22 TXV or piston metering device, it must be changed to a hard —shutoff R-410A refrigerant
TXV.
• Never open system to atmosphere while it is under a vacuum.
• When system must be opened for service, recover refrigerant, evacuate then break vacuum with dry nitrogen and replace filter
driers. Evacuate to 500 microns prior to recharging.
• Do not vent R-410A refrigerant into the atmosphere.
• Do not use capillary tube coils.
• Observe all warnings, cautions, and bold text.
TRAINING
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Copyright 2019 CAC / BDP • 7310 W. Morris St. • Indianapolis, IN 46231 Edition Date: 6119 Catalog No: IM-F84C-FX4D-02
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. Replaces: INi FB4C—FX4D- 01
12
25HBC5, 25HCE4
Single Stage Heat Pumps
with Puron® Refrigerant
1-1/2 To 5 Nominal Tons
Installation Instructions
NOTE: Read the entire instruction manual before starting the installation.
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service, maintenance, or
use can cause explosion, fire, electrical shock, or other conditions which
may cause death, personal injury, or property damage. Consult a
qualified installer, service agency, or your distributor or branch for
information or assistance. The qualified installer or agency must use
factory —authorized kits or accessories when modifying this product.
Refer to the individual instructions packaged with the kits or accessories
when installing.
Follow all safety codes. Wear safety glasses, protective clothing, and
work gloves. Use quenching cloth for brazing operations. Have fire
extinguisher available. Read these instructions thoroughly and follow all
warnings or cautions included in literature and attached to the unit.
Consult local building codes and current editions of the National
Electrical Code (NEC) NFPA 70. In Canada, refer to current editions of
the Canadian electrical code GSA 22.1.
Recognize safety information. This is the safety —alert symbol /R . When
you see this symbol on the unit and in instructions or manuals, be alert to
the potential for personal injury.
Understand these signal words; DANGER, WARNING, and CAUTION.
These words are used with the safety —alert symbol. DANGER identifies
the most serious hazards which will result in severe personal injury or
death. WARNING signifies hazards which could result in personal
injury or death. CAUTION is used to identify unsafe practices which
may result in minor personal injury or product and property damage.
NOTE is used to highlight suggestions which will result in enhanced
installation, reliability, or operation.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or death.
Before installing, modifying, or servicing system, main electrical
disconnect switch must be in the OFF position. There may be more than
1 disconnect switch. Lock out and tag switch with a suitable warning
label.
EXPLOSION HAZARD
Failure to follow this warning could result in
death, serious personal injury, and/or property
damage.
Never use air or gases containing oxygen for
leak testing or operating refrigerant
' compressors. Pressurized mixtures of air or
gases containing oxygen can lead to an
explosion.
Carrier_"'..'
Turn to the experts
INSTALLATION RECOMMENDATIONS
In some cases noise in the living area has been traced to gas pulsations
from improper installation of equipment.
1. Locate unit away from windows, patios, decks, etc. where unit
operation sound may disturb customer.
2. Ensure that vapor and liquid tube diameters are appropriate for unit
capacity.
3. Run refrigerant tubes as directly as possible by avoiding
unnecessary turns and bends.
4. Leave some slack between structure and unit to absorb vibration.
5. When passing refrigerant tubes through the wall, seal opening with
RTV or other pliable silicon —based caulk (see Fig. 1).
6. Avoid direct tubing contact with water pipes, duct work, floor
joists, wall studs, floors, and walls.
7. Do not suspend refrigerant tubing from joists and studs with a rigid
wire or strap which comes in direct contact with tubing (see Fig. 1).
8. Ensure that tubing insulation is pliable and completely surrounds
vapor tube.
4. When necessary, use hanger straps which are 1 in. wide and
conform to shape of tubing insulation (see Fig. 1).
10. Isolate hanger straps from insulation by using metal sleeves bent to
conform to shape of insulation.
,OUTDOORWALLV1,NDOORW"A-LLAULIOUIDTUBE
UOTIONTUBE
INSULAT
THROUGH THE WALL
HANGER STRAP
(AROU TU E�ONILOV „ �-INSULATION
1' (25A I
MIN
SUSPENSION
Fig. I — Connecting Tubing Installation A07588
When outdoor unit is connected to factory —approved indoor unit,
outdoor unit contains system refrigerant charge for operation with AHRI
rated indoor unit when connected by 15 ft. (4.57 m) of field —supplied or
factory accessory tubing. For proper unit operation, check refrigerant
charge using charging information located on control box cover and/or
in the Check Charge section of this instruction.
IMPORTANT: Maximum liquid —line size is 3/8—in. OD for all
residential applications including long line.
IMPORTANT: Always install the factory —supplied liquid —line filter
drier. Obtain replacement filter driers from your distributor or branch.
25HBC5, 25HCE4: Installation Instructions
INSTALLATION
IMPORTANT: Effective January 1, 2015. all split system and packaged
air conditioners must be installed pursuant to applicable regional
efficiency standards issued by the Department of Energy.
CUT HAZARD
Failure to follow this caution may result in personal injury.
Sheet natal parts may have sharp edges or burrs. Use care and wear
appropriate protective clothing and gloves when handling parts.
Check Equipment and Job Site
Unpack Unit
Move to final location. Remove carton taking care not to damage unit.
Inspect Equipment
File claim with shipping company prior to installation if shipment is
damaged or incomplete. Locate unit rating plate on unit corner panel. It
contains information needed to properly install unit. Check rating plate
to be sure unit matches job specifications.
Install on a Solid, Level Mounting Pad
If conditions or local codes require the unit be attached to pad, tie down
bolts should be used and fastened through knockouts provided in unit
base pan. Refer to unit mounting pattern in Fig. 2 to detennine base pan
size and knockout hole location.
For hurricane tie downs, contact distributor for details and PE
Certification (Professional Engineer), if required.
On rooftop applications, mount on level platform or frame. Place unit
above a load —bearing wall and isolate unit and tubing set from structure.
Arrange supporting members to adequately support unit and minimize
transmission of vibration to building. Consult local codes governing
rooftop applications.
Roof mounted units exposed to winds above 5 mph may require wind
baffles. Consult the Service Manual — Residential Split System Air
Conditioners and Heat Pumps for wind baffle construction.
Unit must be level to within f2° (f3/8 in/ft,±9.5 mm/m) per compressor
manufacturer specifications.
Clearance Requirements
When installing, allow sufficient space for airflow clearance, wiring,
refrigerant piping, and service. Allow 24 in. (609.6 mm) clearance to
service end of unit and 48 in. (1219.2 mm) above unit. For proper
airflow, a 6—in. (152.4 mm) clearance on l side of unit and 12—in. (304.8
mm) on all remaining sides must be maintained. Maintain a distance of
24 in. (609.6 mm) between units or 18 in. (457.2 mm) if no overhang
within 12 ft. (3.66 m). Position so water, snow, or ice from roof or eaves
cannot fall directly on unit.
18" (457.2 mm) clearance option described above is approved for
outdoor units with wire grille coil guard only. Units with louver panels
require 24" (609.6 min) between units.
On rooftop applications, locate unit at least 6 in. above roof surface.
A05177
UNIT'BASE-PA
EDOWN"KNOCKOUT'LOCATION in. mm
A
B
C
Dimension in.
(mm)
23 X 5853)
(585
7-3/4 (196.8)
4-13/32 (111.9)
18-1132 (457.9)
267C26'--
(660 X 660)
9-1/8 (231.8)
4-7/16 (112.7)
21-1/4 (539.8)
-31-T/2X3"1= I%2T
9-1/8 (231.8)
6-9/16 (166.7)
24=TT/1
(800 X 800)
(627.1)
(889 X 889)
9-1/8 (231.8)
6-9/16 (166.7)
28-7/16 (722.3)
Fig. 2 — Tiedown Knockout Locations
Operating Ambient
The minimum outdoor operating ambient in cooling mode without
accessory is 55°F (12.78°C), and the maximum outdoor operating
ambient in cooling mode is 125°F (51.67°C). Tile maximum outdoor
operating ambient in heating mode is 66 °F (I 8.89°C).
Check Defrost Thermostat
Check defrost thermostat to ensure it is properly located and securely
attached. There is a liquid header with a distributor and feeder tube
going into outdoor coil. At the end of the one of the feeder tubes, there is
a 3/8 in. O.D. stub tube approximately 2 in. (50.8 mm) long (see Fig. 3).
The defrost thermostat should be located on stub tube. Note that there is
only one stub tube used with liquid header, and on most units it is the
bottom circuit.
COIL
3TAT
Fig. 3 — Defrost Thermostat Location rA975 17
Elevate Unit
UNIT OPERATION HAZARD
Failure to follow this caution may result in equipment damage
improper operation.
Do not allow water and/or ice to build up in base pan.
Elevate unit per local climate and code requirements to provide
clearance above estimated snowfall level and ensure adequate drainage
of unit.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
25HBC5, 25HCE4: Installation Instructions
Table 1 -Accessory Usage
REQUIRED FOR LOW -AMBIENT
REQUIRED FOR
Accessory
COOLING APPLICATIONS
i REQUIRED FOR
LONG LINE APPLICATIONS
SEA COAST
APPLICATIONS (Within 2
(Below 55°F 112.8°C)
miles 13.22 km)
Accumulator
Standard
Standard
Standard
Ball Bearing Fan Motor
Yest
No
Yes
No
No
Compressor Start Assist Capacitor and
Yes
Relay
Crankcase Heater
Yes
Yes
No
Evaporator Freeze Thermostat
Yes
No
No
Hard Shutoff TXV
Yes
Yes
No
Isolation Relay
Yes
No
No
Liquid Line Solenoid Valve
No
See Long -Line Application Guideline
No
Motor Master® Control or
Yes$
No
No
Low Ambient Switch
Support Feet
Recommended
No
Recommended
*. For tubing line sets between 80 and 20(I ft. (24.38 and 60.96 m) and/or 20 ft. (6.09 m) vertical differential, refer to Residential Piping and Longline Guideline.
f. Additional requirement for Low -Ambient Controller (full modulation feature) MotorMasterg Control.
$. In units equipped kith ECM OD motor, motor needs to be replaced per unit acces,ory guide to work properly. This motor kit comes with a new defrost board that also needs to be
installed. Unit will not meet AHRI rated efficiency once motor and control board are replaced to use this accessory.
Make Piping Connections
PERSONAL INJURYAND ENVIRONMENTAL
HAZARD
Failure to follow this warning could result in personal injury or death.
Relieve pressure and recover all refrigerant before system repair or
final unit disposal.
Use all service ports and open all flow -control devices, including
solenoid valves.
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage or
improper operation.
IfANY refrigerant tubing is buried, provide a 6-in (152.4 mm) vertical
rise at service valve. Refrigerant tubing lengths up to 36-in (914.4
mrt). may be buried without further special consideration. Do not bury
lines longer than 36 in (914.4 mm).
Outdoor units may be connected to indoor section using accessory
tubing package or field -supplied refrigerant grade tubing of correct size
and condition. For tubing requirements beyond 80 ft, substantial
capacity and performance losses can occur. Following the
recommendations in the Residential Piping and Long Line Guideline
will reduce these losses. Refer to Table 1 for accessory requirements.
Refer to Table 2 for field tubing diameters.
There are no buried -line applications greater than 36 in. (914.4 mm)
If refrigerant tubes or indoor coil are exposed to atmosphere, they must
be evacuated to 500 microns to eliminate contamination and moisture in
the system.
Outdoor Unit Connected To Factory Anoroved Indoor
Unit
Outdoor unit contains approximate system refrigerant charge for
operation with approved AHRI rated indoor unit when connected by 15
ft (4.57 m) of field -supplied or factory -accessory tubing, and factory
supplied filter drier. Some indoor units require additional subcooling to
achieve optimal heating performance. Using Table 5 or 6 - Additional
Subcooling Required, check refrigerant charge for maximum efficiency
Service Valves
Service valves are closed and plugged from the factory. Outdoor units
are shipped with a refrigerant charge sealed in the unit. Leave the service
valves closed until all other refrigerant system work is complete or the
charge will be lost. Leave the plugs in place until line set tubing is ready
to be inserted.
Heat pumps require a piston metering device in the liquid service valve
for proper heating operation. Piston is shipped in the piston body of the
liquid service valve, temporarily held in place with a plastic cap. Do not
remove the plastic cap until line set tubing is ready to be installed.
Refer to Fig. 4 and follow these steps for piston installation:
1. Remove plastic cap holding piston in piston body of liquid service
valve.
2. Check that piston size (stamped on side of piston) matches with
number listed on unit rating plate. Return piston to piston body of
liquid service valve (either direction).
3. Find plastic bag taped to unit containing copper adapter tube, brass
nut, and plastic washer.
4. Install plastic washer in the seat inside piston body.
5. Fit brass nut onto adapter tube and install tube onto liquid service
valve. Tighten nut finger tight, then wrench additional %: turn only
[15-ft lbs (20.3 N-m)]. Over tightening may damage the plastic
washer and service valve's piston body.
BRASS NUT
ADAPTER TUBE
r- PLASTIC WASHER
PISTON
PISTON BODY
LIQUID SERVICE
Ia
Fig. 4 - Liquid Service Valve with Heating Piston and Adapter Vue,
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
25HBC5, 25HCE4: Installation Instructions
IALVE
VALVE CORE
Fig. 5 — Vapor Service Valve
Brazing Connections
Clean line set tube ends with emery cloth or steel brush. Remove any grit
or debris.
Connect vapor tube to fitting on outdoor unit vapor service valves (see
Table 2). Connect liquid tubing to adapter tube on liquid service valve.
Use refrigerant grade tubing.
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage or
improper operation.
Service valves must be wrapped in a heat —sinking material such as a
wet cloth while brazing.
Apply heat absorbing paste or heat sink product between service valve
and joint. Wrap service valves with a heat sinking material such as a wet
cloth.
After wrapping service valve with a wet cloth, tubing set can be brazed
to service valve using either silver bearing or non —silver bearing brazing
material. Do not use soft solder (materials which melt below
800°F/427°C). Braze joints using a Sil-Fos or Phos-copper alloy.
Consult local code requirements.
Some outdoor units contain a mechanical fitting at the liquid distributor.
This connection is not field serviceable and should not be disturbed.
For Liquid Service Valve - Braze lineset to adapter tube BEFORE
bolting adapter to valve. This helps prevent overheating and damage to
plastic washer or o-ring.
For Vapor Service Valve - remove valve core from Schrader port on
Service Valve BEFORE brazing. This helps prevent overheating and
damage to valve seals (refer to Fig. 5). Replace valve core when brazing
is completed.
FIRE HAZARD
Failure to following this warning could result in personal injury, death
and/or property damage.
Refrigerant and oil mixture could ignite and burn as it escapes and
contacts brazing torch. Make sure the refrigerant charge is properly
removed from both the high and low sides of the system before brazing
any component or lines.
Table 2 — Refrigerant Connections and Recommended Liquid
and Vapor Tube Diameters (In.)
UNIT SIZE
LIQUID
RATED VAPOR
Connection I Tube
Diameter Diameter
Connection
Diameter
Tube
Diameter
25HBC5, 25HCE4
18,24
3/8
3/8
518
5/8
30,36
3/8
3/8
3/4
3/4
42,48
318
3/8
7/8
7/8
60�
3/8
3/8
718
1-1/8
25HBC5 Only
37
3/8
3/8
3/4
3/4
61
3/8
3/8---�7/8
1-1/8
*. Units are rated with 25 fl. (7.6 m) of linesct. See Product Data sheet for
performance data when using dillerent size and length linesets.
Notes:
I. Do not apply capillary tube indoor coils to these units.
2. For Tubing Set lengths between 80 and 200 fl. (24.38 and 60.96 m) horizontal or 20
11. (6.09 m) vertical differential 250 ft. (76.2 m) Total Equivalent Length, refer to
the Residential Piping and Longline Guideline— Air Conditioners and Heat Pumps
using Puron refrigerant.
Mechanical Line Set Connections
If using mechanical or crimp -type line set connections, follow crimp tool
manufacturer's instructions.
NOTE: Should the use of mechanical fittings cause failure of the fittings
or failure of the equipment, such would not be covered under the
standard warranty.
Installing with Indoor Piston
Heat pumps with piston indoor ratings are shipped with the correct
indoor piston size in the accessory bag. Check piston size shipped with
indoor unit to see if it matches required indoor piston size. If it does not
match, replace indoor piston with correct piston size which is listed on
the rating plate.
NOTE: Heat pumps without piston indoor ratings may be installed as a
replacement component in a piston system. When installing a
non -piston rated heat pump with with a piston indoor the correct indoor
piston must be installed. When not listed on the rating plate the correct
piston size is listed in the product data. Replacement pistons can be
ordered from Replacement Components.
13/16" BRASS HEX NUT
TEFLON@ SEAL
TEFLON@ 3/4" BRASS HEX BODY
INGS
"H" DISTRIBUTOR
PISTON
PISTON RETAINER
Fig. 6 — Indoor Piston Installation A 10342
Install Liquid Line Filter Drier Indoor
Refer to Fig. 7 and install filter drier as follows:
1. Braze 5 in. (127 mm) liquid tube to the indoor coil.
2. Wrap filter drier with damp cloth.
3. Braze filter drier to 5 in. (127 mm) long liquid tube from step 1.
4. Connect and braze liquid refrigerant tube to the filter drier.
IMPORTANT: Installation of the filter drier in liquid line is required.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
25HBC5, 25HCE4: Installation Instructions
Fig. 7 — Liquid Line Filter Drier
n05227
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage
improper operation.
Installation of filter drier in liquid line is required.
Evacuate Refrigerant Tubing and Indoor Coil
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage or
improper operation.
Never use the system compressor as a vacuum pump.
Refrigerant tubes and indoor coil should be evacuated using the
recommended deep vacuum method of 500 microns. The alternate triple
evacuation method may be used (see triple evacuation procedure in
service manual). Always break a vacuum with dry nitrogen.
Deep Vacuum Method
The deep vacuum method requires a vacuum pump capable of pulling a
vacuum of 500 microns and a vacuum gage capable of accurately
measuring this vacuum depth. The deep vacuum method is the most
positive way of assuring a system is free of air and liquid water. A tight
dry system will hold a vacuum of 1000 microns after approximately 7
minutes. (See Fig. 8.)
5000
4500
4000
3500
Ln
ZO 3000
LEAKIN
SYSTEM
V_ 2500
2000
1500
VACUUM TIGHT
T00 WET
1000
500
TIGHT
DRY SYSTEM
0 1 2 3 4 5 6 7
MINUTES
Fig. 8 — Deep Vacuum Graph n95424
Final Tubing Check
IMPORTANT: Check to be certain factory tubing on both indoor and
outdoor unit has not shifted during shipment. Ensure tubes are not
rubbing against each other or any sheet metal. Pay close attention to
feeder tubes, makings sure wire ties on feeder tubes are secure and tight.
Make Electrical Connections
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or death.
Do not supply power to unit with compressor terminal box cove
removed.
Be sure field wiring complies with local and national tire, safety, and
electrical codes, and voltage to system is within limits shown on unit
rating plate. Contact local power company for correction of improper
voltage. See unit rating plate for recommended circuit protection device.
NOTE: Operation of unit on improper line voltage constitutes abuse and
could affect unit reliability. See unit rating plate. Do not install unit in
system where voltage may fluctuate above or below permissible limits.
NOTE: Use copper wire only between disconnect switch and unit.
NOTE: Install branch circuit disconnect of adequate size per NEC to
handle unit starting current. Locate disconnect within sight from and
readily accessible from unit, per Section 440-14 of NEC.
Route Ground and Power Wires
Remove access panel to gain access to unit wiring. Extend wires from
disconnect through power wiring hole provided and into unit control
box.
Connect Ground and Power Wires
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or death.
The unit cabinet must have an uninterrupted or unbroken ground to
minimize personal injury if an electrical fault should occur. The ground
may consist of electrical wire or metal conduit when installed in
accordance with existing electrical codes.
Connect ground wire to ground connection in control box for safety.
Connect power wiring to contactor as shown in Fig. 9.
DISCONNECT
PER N.E.C. AND/OR
LOCAL CODES
CONTACTOR ---7O
---------- ---_-O O
WIRING O
3 PHASE ONLY BLUE
FIELD GROUND —
------------
WIRING _ --J GROUND LUG
Fig. 9 — Line Connections ne402s
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
25HBC5, 25HCE4: Installation Instructions
JNT A --TO F, [-'.
::.:. CDM
c r'
:;
c r'
:;
1FF3IND -'IVEC
0 rd:i'I<
Pig. 10 — 3—Phase Monitor Control Aono U1
(Applies to 3—Phase Units Only)
Table 3 —3-Phase Monitor LLD Indicators
--I
__._ ...... .... -_______ . l
OFF No call for compressor operation
FLASHING Reversed phase
ON Normal
........................
Connect Control Wiring
Route 24v control wires through control wiring grommet and connect
leads to control wiring. See Thermostat Installation Instructions for
wiring specific unit combinations. (See Fig. 11.)
Use No. 18 AWG color —coded, insulated (35°C minimum) wire. If
thermostat is located more than 100 ft (30.5 m) from unit, as measured
along the control voltage wires, use No. 16 AWG color —coded wire to
avoid excessive voltage drop.
All wiring must be NEC Class 2 and must be separated from incoming
power leads.
Use furnace transformer, fan coil transformer, or accessory transformer
for control power, 24v/40va mininnun.
Use of available 24v accessories may exceed the minimum 40va power
requirement. Determine total transformer loading and increase the
transfonmer capacity or split the load with an accessory transformer as
required.
TYPICAL HEAT
HP THERMOSTAT FAN COIL PUMP
24 VAC HOT
24 VAC COM
HEAT STAGE 2
W2
1-_ W2- _ _ W2
COOL/HEAT
STAGE 1
Y
E
pe --* --
INDOOR FAN
G
G
RVS COOLING
nn j�j
EMERGENCY
HEAT
* IF AVAILABLE
LEGEND
----
24-V FACTORY WIRING
----
24-V FIELD WIRING
'Tr
FIELD SPLICE CONNECTION
�qT
OUTDOOR THERMOSTAT
EMERGENCY HEAT RELAY
SUPPLEMENTAL HEAT RELAY
A02325 l a97413
Fig. 11 — Generic Wiring Diagrams
(See tstat Installation Instructions for specific unit combinations)
Final Wiring Check
IMPORTANT: Check factory wiring and field wire connections to
ensure terminations are secured properly. Check wire routing to ensure
wires are not in contact with tubing, sheet metal, etc.
Compressor Crankcase Heater
When equipped with a crankcase heater, furnish power to heater a
minimum of 24 hr before starting unit. To furnish power to heater only,
set thermostat to OFF and close electrical disconnect to outdoor unit.
A crankcase heater is required if refrigerant tubing is longer than 80 ft
(24.38 m), or when outdoor unit is 20 11 (6.10 m) below indoor unit.
Refer to the Residential Piping and Long Line Guideline.
Install Electrical Accessories
Refer to the individual instructions packaged with kits or accessories
when installing.
Start —Up
PERSONAL INJURY HAZARD
Failure to follow this caution may result in personal injury.
Wear safety glasses, protective clothing, and gloves when handling
refrigerant and observe the following:
• Front seating service valves are equipped with Schrader valves.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
25HBC5, 25HCE4: Installmion Instructions
ENVIRONMENTAL HAZARD
Failure to fellow this caution may result in environmental damage,
Federal regulations require that you do not vent refrigerant to the
atmosphere. Recover during system repair or final unit disposal,
KNIT OPERATION AND SAFETY HAZARD
Failure to follow this caution may result in personal igjury, equipment
damage or improper operation.
• Do not overcharge system with refrigerant.
• Do ni)t opel-:ite Unit ern a vacuum or ai negative pre ,urc.
• Do not disable low pressure switch in scroll compressor applications,
• Compressor dome temperatures may be hot.
Follow these steps to properly start up system:
I. After system is evacuated, fully open liquid and vapor service
valves.
2 Unit is shipped with valve stern(s) front seated (closed) and caps
installed. iteplace stem caps after system is opened to refrigeratnt
flow (back seated). Replace caps finger -tight and tighten with
wrench in additional 1112 turn,
3. Close electrical disconnects to en.ergizu system.
4. Set roost thermostat at desired temperaturc. Be sure set point is
below indoor ambient temperature for cooling mode operation_
5. Set room thcrmo.stat to HEAT or COOL and fan control to ON or
AUTO mode, as desired. Operate Unit for 15 minutes. Check
system refrigerant charge.
Sequence of Operation
Turn on power to indoor and outdoor units. Transformer is energized.
Cooling
Oil a call for cooling, thermostat makes circuits R-0 and R-Y, and R-6.
Circuit R-O energizes reversing valve, switching it to cooling position_
Circuit R Y energizes contactor, starting outdoor fan motor and
compressor circuit. R-G energizes indoor unit blower relay, starting
indoor blower motor on high speed.
When thermostat is srtisl ed, its contacts open, de -energizing contactor
and blower relay. Compressor and motors should stop,
If indoor unit is equipped With a time -delay relay circuit, the indoor
blower will run an additional 90 seconds to increase system cllicicncy.
ticaling
On a call for heating, thermostat makes circuits R-Y and R-G. Circuit
R-Y energizes contactor, starting outdoor fsrn motor and compressor.
Circuit R-G energizes indoor blower relay, starting blower motor on
high speed.
Should temperature continue to fall, R-W2 is made through second -
stage room thcrrmostat. Circuit R-W2 energizes a relay, bringing on first
bank of supplemental electric heat and providing electrical potential to
second heater relay (if used). If outdoor temperature falls below setting
ofoutdoor thermostat (field installed option), contacts close to complete
circuit and bring on second bank of supplemental cle::tric heat.
When thermostat is satisfied, its contacts open, de energizing contactor
and relay_ All heaters and motors should stop.
Quiet Shift-2
Quiet Shift-2, available on units with aluminum outdoor coils, is a field
selectable defrost mode (factory set to OFF), which will reduce file
occasional noise that could be heard at the start of defrost cycle and
restarting of heating, cycle. it is selected by placing DiP switch 3 on
defrost board in the ON position,
When Quiet Shift-2 switch is placed in ON position, and defrost is
initiated, the followin{g sequence of operation will occur:
The compressor will be de -energized for approximately 1 minute,
then the reversing valve will be energized_ A few seconds later, the
compressor will be re -energized and the normal defrost cycle starts.
Once defrost termination conditions have been met, the following;
sequence will occur:
- The compressor will be de-ener«ized for approximately i minute,
then tine reversing valve will be de -energized. A few seconds later,
the compressor will be re -energized and the normal heating cycle.
starts.
Defrost
The defrost control is a lime/temperature control which includes a field
selectable time period (either a fixed period determined by
quick -connects located at board edge for non -Quiet Shift-2 boards or an
initial period based on DIP switches then varies with defrost cycle length
for boards with Quiet Shift-2) between defrost cycles (30, 60, 90, and/or
120 minutes), factory set to either 60 or 90 minutes.
For all defrost controls, the defrost tlhernu,stat senses coil temperature
throughout tine heating cycle. When the coil temperature reaches the
defrost thermostat setting of approximately 32"F (11°C), it will close,
which energizes the DF-1' terminal and begins the defrost tinting
sequence. The timer runs only when the defrost thermostat is closed and
the contactor is energized.
Defrost mode is ident ical to cooling mode except that outdoor Ian motor
stops and second -stage heat is turned on to continue warming
conditioned spaces.
Defrost Speedup
uict Sh�l, � ti'ln�ii�h
To initiate a lirrced de Lost, speedup pins (J 1) must be shorted with a 11at
head screwdhiver I'm, 5 seconds and RELEASED. if the defrost
thermostat is open, a short defrost cycle will be observed (actual length
depends on Quiet Shift-2 switch position). When Quiet Shift-2 is off.
only a short 30 second defrost cycle is observed. With Quiet Shift-2 ON.
the spccdup sequence is approximately 3 minutes: I minute compressor
off period followed by 30 seconds of defrost with compressor operation,
When returning to heating mode. the compressor will turn off for an
additional minute,
If the defrost thermostat is closed, a complete defrost cycle is initiated. if
the Quiet Shift-2 switch is turned on, the compressor will be turned off
for two 1-minute intervals as explained previously.
NOTE: Forcing a defrost will reset the defrost interval to the DIP switch
setting before returning variable length intervals based on defrost cycle
lengths.
All Other Models
To initiate defrost, the defrost thermostat must be closed. This can be
accomplished as follows:
I . Turn off power to outdoor unit.
2. Disconnect outdoor fats motor lead from OF2 on control board (see.
Fig. 12). Tape lead to prevent grounding.
3. Restart unit in heating mode, allowing frost to accumulate on
outdoor coil.
4. After a few minutes in heating mode. liquid line temperature should
drop below closing point of defrost thermostat (approximately
3o°Ff- l ,1100.
S. Short between speedup terminals with a flal-blade screwdriver,
This reduces the tinning sequence to 1125th ol'original time. (See
Table 4.)
6. When you hear reversing valve change position, remove
screwdriver immediately: otherwise. control will terminate normal
10-minute defrost cycle in approximately 2 seconds.
\OTT: Length ofclefrost cycle is dependent upon length ot'druc it takes
to remove screwdriver from test pins after reversing valve has shifted.
7. Unit will remain in defrost for remainder of defrost cycle time or until
defrost thermostat reopens at approximately 65°F (1833°C) coil
temperature of liquid line,
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
25HBC5, 25HCE4: Installation Instructions
8. Turn off power to outdoor unit and reconnect fan motor lead to OF2
on control board.
T1-ENABLES DEFROST
TIMER.MUST BE
ENERGIZED FOR
DEFROST TIMER
TO START
C-COMMON
0 - REVERSING VALVE
(9 OM
9'FU1 -
0
OUTDOOR FAN
RELAY
®F2
DEFROST THERMOSTAT
MUST BE CLOSED BEFORE
DEFROST TIMER BEGINS
Y OUTPUT TO PRESSURE
SWITCHES AND CONTACTOR
o a o
V ®F'[J:1
TI000
Or
o
I o000 00 00
0
0 A W C SPEEDUP
THERMOSTAT INPUTS
Non -Quiet Shift-2 Control Board
Fig. 12 — Defrost Control
M #'F 1 00�
0
OF2
0 0 0�
120 Pu
o�IlEr
0 1 YIFT
90
INIEFWAL TIMER OFF
OFT
n @)s
099u n
T2 C C 0 T1 Y Pi DSP�EDUP
DFT
O R W.,Y C
Quiet Shift-2 Control Board
Table 4 — Defrost Control Speedup —Timing Sequence
N
N d
C U
o ti
00
mC3 L !E
av)
i
PARAMETER I MINIMUM
(MINUTES)
I
I
MAXIMUM SPEEDUP
(MINUTES) (NOMINAL)
30—minute cycle
50—minute cycle
27
33
7 sec
12 sec
45
55
90—minute cycle
81 99
21 sec
10—minute cycle
5 minutes
9 11
4.5 5.5
2 sec
1 sec
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
25HBC5, 25HCE4; Installation instructions
Check Charge
Factory charge amount and desired subcooling are shown on unit rating
plate. Additional subcooling may be required to achieve optimal heating
performance based on the installed indoor emit_ (see Table 5 or 6).
Charging method is shown on information plate inside unit. For TX1;
arse subcooling method. For piston, use superheat mcthod. To properly
check or adjust charge, conditions must be favorable lur subcooling or
superheat charging. Favorable conditions exist when the outcloor
temperature is beuveen 70'F and I00"F (2I . i VC and 37.78"C), and the
indoor temperature is bchveen 70'F and 80'F (21.11"C and 26.67=(')_
Follow the procedure below_
Unit is factory charged for 15ft (4,57 m) of linesct. Adjust charge by
adding or removing 0,6 of-fl (.018 k-g;m) of N8 liquid Line above or
below 15[t (4.57 m) respectively.
For standard refrigerant line lengths (80 W24.38 in or less), allow system
to operate in cooling mode at least 15 minutes. If conditions are
favorable. check system charge by super heat method for fixed metering
device and subcooling method for TXV. If any adjustment is necessary,
adjust charge slowly and allow system to operattc for 15 minutes to
stabilize before declaring a properly charged system. Refer to Tirblr 5 or
6 for additional subcooling required.
If the indoor temperature is above 8W (26.67°C), and the outdoor
temperature is in the favorable range, adjust system charge by weight
based on line length and allow the indoor temperature to drop to 80'F
(26,67°C) before attempting to check system charge by subcooling
method as described above,
it' the indoor temperature is below 70°F (21.11*C), or the outdoor
temperature is not in the favorable range, adjust charge for line set length
above or below 15ft (4.57 m) only. Charge level should then be
appropriate for the system to achieve rated capacity. The charge level
could then be checked at another time when the both indoor and outdoor
temperatures are in a more favorable range.
If line length is beyond 80 ft (24.38 in) or greater than 20 ft (6,10 m)
vertical separation,. See Residential piping and Long Line Guideline for
special charging requirements.
Units with Cooling Mode TXV
Units installed with cooling mode TXV require charging by the
subcooling method,
1. Operate unit a mininiurn of 15 minutes before checking charge_
2. Measure liquid service valve pressure by attaching an accurate gage
to service port.
3. Measure liquid line hnrperature by attaching an accurate thermistor
type or electronic thermometer to liquid line near outdoor coil.
4. Refer to unit rating plate for required subcooling temperature.
5. Refer to Table 7. Find the point where required subcooling,
temperature intersects measured liquid service valve pressure.
6. To obtain required subcooling temperature at a specific liquid line
pressure, add refrigerant if liquid line temperature is higher than
indicated or reclaim refrigerant if temperature is lower. Allow a
tolerance of?3" F.
Units with Indoor Pistons
Units installed with indoor pistons require charging by the superheat
mcthod.
The IbIlowing procedure is valid when indoor airflow is within ?21
percent ofits rated ('FM_
I. Operate unit a minimum of 15 minutes before checking charge.
2. Measure suction pressure by attaching an accurate gage to suction
valve service port.
3. Measure suction temperature by attaching an accurate thertnistor
type or electronic thermometer to suction line at service valve.
4. Measure outdoor airdry—bulb temperature with thermometer,
5. Measure indoor air (entering indoor coil) wct—bulb temperature
with a sling psychrometer.
6. Refer to Table 8. Find outdoor temperature and evaporator entering
air wet —bulb temperature. At this intersection, note superheat.
Wilicre a dash (—) appears on the table, do not attempt to charge
system under these conditions or refrigerant slugging may occur.
Charge must be lvcighted in, adding or removing 0.6 oz'ft of 318
liquid line above or below I It (4.57 in) ropeetively.
7. Refer to Table: 9. Find Superheat leniperature locolcd in item 6 and
suction pressure, At this intersection, note suction line temperature,
8, if unit has a higher suction line temperature than charted
temperature, add refrigerant until charted temperature is reached.
9. If unit has a lower suction line temperature than chatted
temperature, reclaim refrigerant until charicd temperature is
reached.
10, When adding refrigerant, charge in liquid form into suction service
port using a flo%v—restricting device.
11. If outdoor air temperature or pressure at suction valve changes
charge to new suction line temperature indicated on chart.
12.Optimum performance will be achieved when the operating
charge produces 5' to fr°F suction superheat at suction service,:
valve with 820F outdoor ambient and 80OF (26.70C) dry bulb
670E (19.40C) wet bulb indoor temperature (DOE, "B" test
conditions) at rated airflow.
Heating Check Chart Procedure
To check system operation during heating cycle, refer to the Heating
Check Chart on outdoor unit. This chart indicates whether a correct
relationship exists between system operating pressure and air
temperature entering indoor and outdoor units. If pressure and
temperature do not match on chart. system refrigerant charge may not be
correct. Do not use char to adjust refrigerant charge.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without otrligations.
25HBC5.25HCE4: Installation Instructions
Table 5 — Additional Subcooling Required - Model 2511**4
Indoor Unit I Additional Subcooling Required
18 I 24 30 36 42 48 ^ . _ 60
CAP"2414AL' CAP--2414AL' CAP'30'14AL' CAP"3617AL' _:r1F"4211AL GAP"4821AL 3
__ _
CAP"24-17AL'_ GAP"2417AL- CAP '3Di7AL` GAS '362•A ' CAP"4224AL - GAP"4824AL- - 3 C A G 124 A
CNPV'1814AL' GAP"2517AL' +5 C AP"3677AL` CA-"422'+\ ' -3 C,'SP"d321AL' +5 CAP"6024AL' �5 t NF'J'ol2 i L' -
CNPV'2414AL' +3 GAP"3014AL C AP"3621AL- CA="4224AL' -3 CAP-4u IAL' +:1 GAP"6124AL' 5 CSPI 1-6 "12AL' t .
CNPV'241TAL' +3 GAP-3017AL • CAP"371 AL' +5 GNPV'3617AL' CAP"4624AL' +3 CNPV'4821AL' F134GNF o0L
CSPH'2412AL' +3 ChJPV-2414AL' I CAP"3121AL' +5 CNPV'3621AL' - ;:NPV'4217k CNPV'4824AL'
FB4CNF0,BL CNPV'2417rL' GPP1'3114\L' - CNPJ'4217AL' -3UNPV'4221AI CNPt-6024AL' -3 I XF+-;['4) G,"hJ11F0W0tCiL11- i
FB4CNFW4L CNPV'3014AL - GNPV" 3017AL' - CNPV-4221AL- -3 '.NPV'4R21AL* CSPH'4812AL'
F84CNP018L CNPV-3017AL' • GN!"."3617AL' CSPH-3612AL- -3 ,NPV-4524AL' - CSPIi'60.12AL- �31
FB4CNP024L CSPH-2412AL' GNPV-3621AL' CSPH'4212AL' -5 t-5P11-4212AL' F84CNFC46L
FV4CN(B,F}003L +5 CSPH-3012AL' GSPI13012AL' F54CNF036L-'SPH'4312AL' FU4GNP048L
FV4CNF002L +5 F84CNF030L GSPH'3612AL' +3 F54CNF042L -5 FL14CNI0421. FU4GNP06(,',L 3
1 FX40NF019L +3 F64CNP030L f FB4CNF030L F54CNP038L F84CNF04$L 1=V�CNIB.F)OOSL �3
_ - - --
FX4DNF015L F3 FV-'CN(B.F)003L i FB4CNF 0ML F84CNP042L -5 1:U4CNP042L FV4CN5006L -5 1
1-V4CNFCO2L I FB4CNP030L FV4CN(B.F)003L - F84CNP048L FX-DNlB.F1049L a3
I X'DN15 FI037L , +5 FV4CN B,F) 03L F FV4GNBrD(,L L () -5 FV4CNB FOC!rx�ON(B.F1061L L + ti
FX40NFC'25L r 14CN{B,F)005L +5 FV4CNF002L FV4CN6OC'bl_ +5
FV4CNF002L FXADN{B.F)0371- -5 FX41)N(B,F)0431-j -
F=X4DNF031L FX40N{B.F)043L -5 'F'X4DN(:B,F)0-91-1 +3
e pej, X4:JN{5 F)037L +5 FX-DMB.F)049L +5 F X4DN(5F)06-L +5� —
I I't43L +5 -
1•able 6 :additional Subcooling Required - Model 25H**5
Subcooling Delta from Rating Plate Value
Outdoor Unit Tonnage
Indoor Unit I Additional Subcooling Required
18 24 30 36 42 48 80
CAP"2414AL' CAP"2414AL' - CAP"3014AL' - CA.P"36'7AL' - CAP"4221AL' CAP-4821AL' CAP"6024AL'
CAP"2417AL' CAP"2417AL' CAP"3017AL' - CAP-3621AL' - GAP"4224AL' CAP•'4324.AL' CAP"6124AL'
CNPV'1814AL` CAP"2517AL' �5 CAP"3617AL' - GAP-4221AL- (;AP"4321AL' +5 CAP'r;)24AL- CNPV'6024AL' -
CNPV`2414AL' - CAP" McAl CAP"3621A1` GAP"4?.24AI ' [ AP"4821AI ;t C,1P•'6124At 3 [ �PH'6012AL'
CNPV`2417AL` - CAP"3017AL' CAP"3717AL' *.: CNPV'3617A' CAP"4824AL' I +3 CNPV`4821AL' FB4CNP060L
i
CSPH'2412AL' - CNPV'2414AL CAP"3721AL' +5 CVP '3n"2'.A-' CNPV'4217AL' - CNPV-4824AL' FV-1CNB006L -
F&4CNF018L - CNPV'2417AL CNPV'3014AL' - j CNPV'4217A'-' CNPV'4221AL" - CNPV'6024AL'=X4DN(13,F)D61L -
F94CNF024L --CNPV'3014AL' - CNPV-3017AL' - CNPV'4221A'•_' CNPV'4821AL' CSPH'4812AL'
F64CNP018L CNPV'3017AL' - CNPV'3617AL' • CSPH'3612AL' CNPV`4824AL` - CSPH'6012r1L'
-- -...._
FB4CNP024L i CSPH'2412AL - CNPV'3621AL' C,$P1'4212A ; CSPH'4212AL` FB4CNF048'
FV4CN(B„F)003L CSPH-3012AL' CSPH`3012AL' FBdCNF03(,L CSPH'4812AL' - F84CNP048L
. -
FV4CNF002L - F84CNF030L - CSPH'3612AL' ! F64CNF042L i FB4CNF(M2L F&iCNF000L-
F%40NF019L FB4CNP030L I - FB4CNF030L FB4CNP036L F84CNF04BL - FV4CN(5,F)005L -
FX4DNF025L FV4CN(B,F)003L - F134CNF036L - FB4CNPD-'2L F84CNP042L FV4CN00061- +3
FV40NF002L - FB4CNP030L - FV4CNIB.F)G•J3L FB4CNP048L ! FX40N(B,F)049L
I _
FX40NF031L FB4CNP036L FV4 NIH Fit;:)S[ i3 F1 ^CN(B,F)003L --- -- - - +� � - FXaON{B,F)061L +3
-, FX4DN(B,F)037L +5 FV4CN(B,F)003L - FV4CN55C6L +5 FV4CNf.B,Fl0GSL +3
FX40NF025L - FV4CN(B,F)005L +, FV4CNF002L F5 ,1CNB006L +5
FV4CNF002L FX4DN{B,F)037L FX4DN(B,F)043L -
FX4DNF031 L FX4DN(13.F)043L FX4DN(B.F)049L +3
{ FX4DN(B,F)037L +3 FX4� (B.F)049L +3 FX4DN(B,F)061L +5
FX4DN(B,F)043L F3
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
25HBC5, 25HCE4: Installation Instructions
Note: 37 Size model does not require any subcooling adjustment for various indoor matches.
Table 7 — Required Liquid Line Temperatures °F
LIQUID PRESSURE AT
REQUIRED SUBCOOLING TEMPERATURE ff)
SERVICE VALVE (PSIG)
251
259
8
76
78
10
74
76
12
72
L _. 74
14
72
16
- 70 - - —
18
68
268
80
78
76
T 74
'- 72
_ 70
274
82
80
78
76
74
72
283
291
84
86
82
84
..._...
80 -
82
-- 78 ---I
80
76
744
299
88
86
84
82
80
78
_- 308
90
88
86
84
82
80
317
92
90
88
86
84
82
96
94
_ 90 -..---
92
- __88 ...
90
--�
- 86
.-.88— - -
_.....
84
---- 86 -
335
--
345
98
96
94
92
90
88
- 354
100
98
96
94
L 92
90
364
-
_ 102
100 -
-- — 98
-
96
98
! 94
96
—
92 -
94
374
104
1D2
;- - 100-
384
106
104�
102
100
98
96
395
108
106
104
102
100
98
406
110
106
104
102
�100
416
427
- 112 -..—
114
-- 110 -
112
- - -- - 108
110
106
108
_... 104
106
-- 102 --
104
439
116
114
112
110
108
106
450
118
116 '
114
112
110
108
462
120
118
116
114
112
110
474
122
120
118
-116
114
488
124
122
120
118
116
[_ 114
499
126
124
122
120
118
116
- 511
128
t26 -
124
122
120
- 118
Table 8 — Superheat Charging (Meat Pump Only)
OUTDOOR TEMP ff)
EVAPORATOR ENTERING AIR TEMPERATURE (°F WS)
50
52
54
56
-- 58 --
- - 60
62
64
67
BS -
_ _-70
-72---
74 --1---
7fi-
55
11
11
12
12
12
13
17
20
24
24
25
25
25
1 25
60
6
6
7
7
7
7
12 _
18
22
-23
23
23
23
65
-
-
-
-
-
-
3
7
12
18
19
21
21
22
22
70
_
_
--_
_-1-----
-...._._--
7
14
16
18
20
-20-......._
20
75
-.._-._.-82 ---
-
-
--
-
-
-
-
-
3
11
13
16
18
18
19
-
-
--
-
---
-
- -_- -
6
8
12
15---
16
17
85
-
-
-
-
-
-
-
-
4
7
11
14
15
16
90
--
-
-
-
-
-
-
- - -
---
4
6
12
14
15
95
--
-
-
-
- !
-
-
-
-
-
-
6
10
12 ---
- 14
100
-
-
-
-
-
-
-
-
-
-
4
8
11
12
105
110
-
-
-
--
-
-
-
-
-
-
-
-
-
-
--_
-
-.-��-
-
_
3
-
6
- 5
9
7
11
10
'. Optimum perfotnwnce point, 82°F outdoor ambient and (80°F dry bulb),( 67°F wet bulb) indoor conditions. (DOE Brest Conditions)
Where a dash (--) appears do not attempt to charge system under these conditions or refrigerant slugging may occur. Charge must be weighed in.
Note: Superheat °F is at low -side service port, Allow a tolerance oft YF
Note: Indoor dry bulb between 70°F and 80°F
Table 9 — Required Suction —Line Temperature
SUCTION PRESSURE AT SERVICE PORT (PSIG)
SUPERHEAT TEMP °F
107.8 112.2 118.8 121.2 126 130.8 138.8 140.81 145.8
0
35
37
39
41
43
45
47
49
51
2
37
39
41
43
45
47
49
51
53
4
39
41
43
45
47
49
51
53
55
6
41
43
45
47
49
51
53
55
57
B
43
45
47
49
51
53
55
57
59
10
45
47
49
51
53
55
57
59
61
12
47
49
51
53
55
57
59
61
63
--
14
-
-49---
-- 51
--- 53 ---
_
- -55 --
--- 57 ..._.....
-- - 59
- 61
-._._..63 �...
- 65
16
51
53
55
57
59
I 61
63
65
I 67
-
18
53
55
57
59
61
63
65
67
69
_ ....__
20
55
s7
59
61
63
65
67
1_.-__69
71
22
57
-_, 59 _,
._._.... 61
...... _.63
65
67
69
71
t 73
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
25HBC5, 25HCE4: Installation Instructions
Table 9 — Required Suction —Line Temperature
24
59
61
63
65
I 67
69
71
j 73
75
26
61 _._.-.._.
_._ 63
65 -
67 --
69
71 - —
— 73
75
77
28
63
65
67
69
71
73
75
77
79
30
1 65 1
67
69
71
73
75
77
79
81
Final Checks
IMPORTANT: Before leaving job, be sure to do the following:
1. Ensure that all wiring is routed away from tubing and sheet metal
edges to prevent rub —through or wire pinching.
2. Ensure that all wiring and tubing is secure in unit before adding
panels and covers. Securely fasten all panels and covers.
3. Tighten service valve stem caps to I/ 12—turn past finger tight,
4. Leave Owner's Manual with owner. Explain system operation and
periodic maintenance requirements outlined in manual.
5. Fill out Dealer Installation Checklist and place in customer tile.
care and maintenance
For continuing high performance and to minimize possible equipment
failure, periodic maintenance must be performed on this equipment.
Frequency of maintenance may vary depending upon geographic areas,
such as coastal applications. See Users Manual for information.
Training
My Learning Center is your central location for professional residential HVAC training resources that help strengthen careers and businesses. We
believe in providing high quality learning experiences both online and in the classroom.
Access My Learning Center with your EIVACpartners credentials at www.mlcti-aining.coni, Please contact us a mylcaming@carrier.com with
questions.
02020 Carrier Edition Date: 05/20 Catalog No: 25HRC-HCF,-03SI
Replaces:25 H BC-HCE-02SI
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.