BLD2021-1214_Manufacturer_Specifications_and_Installation_Instructions_9.1.2021_7.53.57_AM_2386983Installation 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
CSA 22.1.
Recognize safety information. This is the safety —alert symbol A.
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.
INSTALLATION RECOMMENDATIONS
NOTE: 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 un-
necessary turns and bends.
4. Leave some slack between structure and unit to absorb vi-
bration.
5. When passing refrigerant tubes through the wall, seal open-
ing 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 sur-
rounds vapor tube.
9. 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.
OUTDOOR WALL INDOOR WPLL
CAULK
r LIOUID TUBE
IIIL_- LSUCTIONTUBE
INSULATION
THROUGH THE WALL
OIST
HANGER STRAP
(AROUNOCTION
BE ONLY INSULATION
ONLY) 0
SUCTIONTUBE
0
1'(]5.d mm)�
MIN LIOUIDTUBE
SUSPENSION
A07588
Fig. 1 — Connecting Tubing Installation
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.
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 metal 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 determine 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.
NOTE: Unit must be level to within ±2° (±3/8 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 1 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. Position
so water, snow, or ice from roof or eaves cannot fall directly on
unit.
On rooftop applications, locate unit at least 6 in. above roof
surface.
3/8-in. (9.53 mm) Dia.
Tiedown Knockouts in
Basepan(2) Places
View From Top
UNIT BASE PAN
Dimension in. (mm)
TIEDOWN KNOCKOUT LOCATIONS in. (mm)
A
B
C
31-1/2 X 31-1/2
(800 x 800)
9-1/8 (231.8)
6-9/16 (166.7)
24-11/16 (627.1)
35 X 35
(889 x 889)
9-1/8 (231.8)
6-9/16 (166.7)
28-7/16 (722.3)
A05177
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). The maximum
outdoor operating ambient in heating mode is 66 °F (18.89°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.
FEEDER TUBE
STUB TUBE
DEFROSTO
THERMOSTAT
A97517
Fig. 3 — Defrost Thermostat Location
Elevate Unit
UNIT OPERATION HAZARD
Failure to follow this caution may result in equipment
damage or 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.
2
Table 1— Accessory Usage
REQUIRED FOR LOW -AMBIENT
REQUIRED FOR
REQUIRED FOR
Accessory
COOLING APPLICATIONS
LONG LINE APPLICATIONS*
SEA COAST APPLICATIONS
(Below 55°F / 12.8°C)
(Within 2 miles / 3.22 km)
Accumulator
Standard
Standard
Standard
Ball Bearing Fan Motor
Yest
No
No
Compressor Start Assist Capacitor and
Relay
Yes
Yes
No
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 200 ft. (24.38 and 60.96 m) and/or 20 ft. (6.09 m) vertical differential, refer to Residential Piping and Longline Guideline.
t Additional requirement for Low -Ambient Controller (full modulation feature) MotorMaster® Control.
f In units equipped with ECM OD motor, motor needs to be replaced per unit accessory 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 Service Valves
PERSONAL INJURY AND 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.
If ANY 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 mm). 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 ADDroved 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 4 — Additional Subcooling Required, check
refrigerant charge for maximum efficiency
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 or outdoor TXV 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 1/2 turn only [15-ft lbs (20.3 N-m)]. Over
tightening may damage the plastic washer and service
valve's piston body.
If the unit is equipped with an outdoor TXV, the liquid service
valve will not contain a piston body. The liquid lineset can be
brazed directly to the liquid service valve, and no piston is needed.
BRASS NUT
ADAPTER TUBE
PLASTIC WASHER
PISTON
PISTON BODY
LIQUID SERVICE VAL
A14235
Fig. 4 — Liquid Service Valve with Heating Piston and
Adapter Tube
ALVE
VALVE CORE
A14236
Fig. 5 — Vapor Service Valve
Brazing Connections
Connect vapor tube to fitting on outdoor unit vapor service valves
(see Table 2). Connect liquid tubing to adapter tube on liquid
service valve if the valve contains a piston body or connect directly
to the liquid service valve if the unit uses an outdoor TXV.
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). Consult local code requirements.
NOTE: Some outdoor units contain a mechanical fitting at the
liquid distributor. This connection is not field serviceable and
should not be disturbed.
NOTE: For Liquid Service Valve with Piston Body - 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 Valves and Liquid Service Valves with No
Piston Body - 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.
Clean line set tube ends with emery cloth or steel brush. Remove
any grit or debris.
Insert line set tube ends into service valve tube stubs.
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.
Braze joints using a Sil-Fos or Phos-copper alloy.
Table 2 — Refrigerant Connections and Recommended Liquid
and Vapor Tube Diameters (In.)
UNIT SIZE
LIQUID
RATED VAPOR
Connection
Diameter
Tube
Diameter
Connection
Diameter
Tube
Diameter
25HCC5,25HPB6
18,24
3/8
3/8
5/8
5/8
30, 36,
3/8
3/8
3/4
3/4
42,48
3/8
3/8
7/8
7/8
60
3/8
3/8
7/8
1-1/8
25HCC5 ONLY
37 3/8 3/8 3/4 3/4
* Units are rated with 25 ft. (7.6 m) of lineset. See Product Data sheet for performance
data when using different size and length linesets.
Notes:
1. Do not apply capillary tube or piston indoor coils to these units.
2. For Tubing Set lengths between 80 and 200 ft. (24.38 and 60.96 m) horizontal or
20 ft. (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.
Install Liquid Line Filter Drier Indoor
Refer to Fig. 6 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.
A05227
Fig. 6 — Liquid Line Filter Drier
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage
or improper operation.
Installation of filter drier in liquid line is required.
Evacuate Refrigerant Jbbing 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. 7.)
5000
4500
4000
3500 LEAK IN
SYSTEM
0 3000
W 2500
i 2000
1500 VACUUM TIGHT
1000 TOO WET
5TIGHT
00
DRY SYSTEM
0 1 2 3 4 5 6 7
MINUTES
A95424
Fig. 7 — Deep Vacuum Graph
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
cover removed.
Be sure field wiring complies with local and national fire, 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. 8.
DISCONNECT
PER N. E. C. AND/OR
LOCALCODES
� CONTACTOR
_FIELD POWER] - - - - - �00
WIRING
- - - - - 000
FIELD GROUND
WIRING GROUND LUG
A91056
Fig. 8 — Line Connections
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. 9.)
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 minimum.
NOTE: Use of available 24v accessories may exceed the
minimum 40va power requirement. Determine total transformer
loading and increase the transformer 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
COOLIHEAT
STAGE 1
INDOOR FAN
RVS COOLING
EMERGENCY
HEAT
R
-
-
*
'j-t hJ
-
G
nn
G
OE
IF AVAILABLE
LEGEND
24 V FACTORY WIRING
----
24VFIELDWIRING
FIELD SPLICE CONNECTION
OUTDOOR THERMOSTAT
EMERGENCY HEAT RELAY
SUPPLEMENTAL HEAT RELAY
A02325 / A97413
Fig. 9 — Generic Wiring Diagrams
(See thermostat 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.
5
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 (24.38m), or when outdoor unit is 20 ft (6.10m) 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.
ENVIRONMENTAL HAZARD
Failure to follow 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.
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this caution may result in personal injury,
equipment damage or improper operation.
• Do not overcharge system with refrigerant.
• Do not operate unit in a vacuum or at negative pressure.
• Do not disable low pressure switch in scroll compressor
applications.
• Compressor dome temperatures may be hot.
Follow these steps to properly start up system:
1. After system is evacuated, fully open liquid and vapor ser-
vice valves.
2. Unit is shipped with valve stem(s) front seated (closed) and
caps installed. Replace stem caps after system is opened to
refrigerant flow (back seated). Replace caps finger —tight and
tighten with wrench an additional 1/12 turn.
3. Close electrical disconnects to energize system.
4. Set room thermostat at desired temperature. Be sure set
point is below indoor ambient temperature.
5. Set room thermostat 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.
Cooline
On a call for cooling, thermostat makes circuits R—O and R—Y, and
R—G. 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 satisfied, its contacts open, de —energizing
contactor and blower relay. Compressor and motors should stop.
NOTE: If indoor unit is equipped with a time —delay relay circuit,
the indoor blower will run an additional 90 seconds to increase
system efficiency.
Heating
On a call for heating, thermostat makes circuits R—Y and R—G.
Circuit R—Y energizes contactor, starting outdoor fan 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 thermostat. 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 of outdoor thermostat (field
installed option), contacts close to complete circuit and bring on
second bank of supplemental electric 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 is a field selectable defrost mode (factory set to OFF),
which will reduce the 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 following 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 -energized for
approximately 1 minute, then the 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 time/temperature control which has field
selectable settings of 30, 60, 90, or 120 minutes, factory set to 90
minutes. These settings represent the amount of time that must pass
after closure of the defrost thermostat before the defrost sequence
begins.
**F 1 •
00�
DO
Ih Ih (ILl
OF2
I I I I I
0 0
I
ON
120 KI
0 ❑
QUIET
0 30 30 SHIFT
90
INTERVAL TIMER OFF
DFT III OFa
T2CCO T1 Y
P1 J1 DFT
O R W,YC
C SPEEDUP `��J
A05378
Fig. 10 - Defrost Control HK32EA008
The defrost thermostat senses coil temperature throughout the
heating cycle. When the coil temperature reaches the defrost
thermostat setting of approximately 32°F (0°C), it will close,
which energizes the DFT terminal and begins the defrost timing
sequence. When the DFT has been energized for the selected time,
the defrost cycle begins. Defrost cycle is terminated when defrost
thermostat opens, or automatically after 10 minutes.
Defrost Speedup
To initiate a forced defrost, speedup pins (J1) must be shorted with
a flat head screwdriver for 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 speedup sequence is
approximately 3 minutes; 1 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 1 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.
lI i, s1
C uLF
3
W
1
S
PLU U
�1
�i
t,FI
o�QUIET
SHIFT
❑ F F
1 EI��DC2 ODC1 rs
T_ Y L IEDFT
o
W U R A2 Y C— SPEEDUP-M
Fig. 11- Defrost Control HK32EA010
Table 3 - Defrost Control Speedup -Timing Sequence
A170130
PARAMETER
MINIMUM
(MINUTES)
MAXIMUM
(MINUTES)
SPEEDUP
(NOMINAL)
30-minute cycle
27
33
7 sec
50-minute cycle
45
55
12 sec
90-minute cycle
81
99
21 sec
10-minute cycle
9
11
2 sec
5 minutes
4.5
5.5
1 sec
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 unit.
(see Table 4).
Charging method is shown on information plate inside unit. For
TXV, use subcooling method. For piston, use superheat method.
To properly check or adjust charge, conditions must be favorable
for subcooling or superheat charging. Favorable conditions exist
when the outdoor temperature is between 70°F and 100°F
(21.11°C and 37.78°C), and the indoor temperature is between
70°F and 80°F (21.11°C and 26.67°C). Follow the procedure
below:
Unit is factory charged for 15ft (4.57 m) of lineset. Adjust charge
by adding or removing 0.6 oz/ft (.018 kg/m) of 3/8 liquid line
above or below 15ft (4.57 m) respectively.
For standard refrigerant line lengths (80 ft/24.38 m 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
operate for 15 minutes to stabilize before declaring a properly
charged system. Refer to Table 5 or 4 for additional subcooling
required.
If the indoor temperature is above 80°F (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.
If 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.
NOTE: If line length is beyond 80 ft (24.38 m) 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 minimum of 10 minutes before checking
charge.
2. Measure liquid service valve pressure by attaching an accur-
ate gage to service port.
3. Measure liquid line temperature by attaching an accurate
thermistor type or electronic thermometer to liquid line near
outdoor coil.
4. Refer to unit rating plate for required subcooling temperat-
ure.
5. Refer to Table 5. Find the point where required subcooling
temperature intersects measured liquid service valve pres-
sure.
6. To obtain required subcooling temperature at a specific li-
quid line pressure, add refrigerant if liquid line temperature
is higher than indicated or reclaim refrigerant if temperature
is lower. Allow a tolerance of f YE
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 chart to adjust refrigerant charge.
Table 4 — 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
60
CAP**1814AL*
—
CAP**2414AL*
—
CAP**3014AL*
—
CAP**3614AL*
—
CAP**4221AL*
—
CAP**4817AL*
—
CAP**6021AL*
—
CAP**2414AL*
—
CAP**2417AL*
—
CAP**3017AL*
—
CAP**3617AL*
—
CAP**4224AL*
—
CAP**4821AL*
—
CAP**6024AL*
—
CAP**2417AL*
—
CAP**2517AL*
+5
CAP**3614AL*
—
CAP**3621AL*
—
CAP**4321AL*
+5
CAP**4824AL*
—
CAP**6124AL*
—
CNPV*1814AL*
—
CAP**3014AL*
—
CAP**3617AL*
—
CAP**4221AL*
—
CAP**4817AL*
+5
CAP**6021AL*
—
CNPV*6024AL*
—
CNPV*2414AL*
—
CAP**3017AL*
—
CAP**3621AL*
—
CAP**4224AL*
—
CAP**4821AL*
+3
CAP**6024AL*
—
CSPH*6012AL*
—
CNPV*2417AL*
—
CNPV*2414AL*
—
CAP**3717AL*
+5
CNPV*3617AL*
—
CAP**4824AL*
+3
CAP**6124AL*
+3
FB4CNP060L
—
CSPH*2412AL*
—
CNPV*2417AL*
—
CAP**3721AL*
+5
CNPV*3621AL*
—
CNPV*4217AL*
—
CNPV*4821AL*
—
FV4CNB006L
—
FB4CNF018L
—
CNPV*3014AL*
—
CNPV*3014AL*
—
CNPV*4217AL*
—
CNPV*4221AL*
—
CNPV*4824AL*
—
FX4DN(B,F)061L
—
FB4CNF024L
—
CNPV*3017AL*
—
CNPV*3017AL*
—
CNPV*4221AL*
—
CNPV*4821AL*
—
CNPV*6024AL*
—
FB4CNP018L
—
CSPH*2412AL*
—
CNPV*3617AL*
—
CSPH*3612AL*
—
CNPV*4824AL*
—
CSPH*4812AL*
—
FB4CNP024L
—
CSPH*3012AL*
—
CNPV*3621AL*
—
CSPH*4212AL*
—
CSPH*4212AL*
—
CSPH*6012AL*
—
FFMANP018
—
FB40NF030L
—
CSPH*3012AL*
—
FB40NF036L
—
CSPH*4812AL*
—
FB4CNF048L
—
FFMANP019
—
FB4CNP030L
—
CSPH*3612AL*
—
FB40NF042L
—
FB4CNF042L
—
FB4CNP048L
—
FFMANP024
—
FFMANP024
—
FB4CNF030L
—
FB40NP036L
—
FB4CNF048L
—
FB4CNP060L
—
FFMANP025
—
FFMANP025
—
FB4CNF036L
—
FB40NP042L
—
FB4CNP042L
—
FV4CN(B,F)005L
—
FPMAN*018
—
FFMANP030
—
FB4CNP030L
—
FFMANP036
—
FB4CNP048L
—
FV4CNB006L
+3
FPMAN*024
—
FFMANP031
—
FB4CNP036L
—
FFMANP037
—
FV4CN(B,F)003L
—
FX4DN(B,F)049L
—
FPMBN*018
—
FPMAN*024
—
FFMANP030
—
FPMAN*036
—
FV4CN(B,F)005L
+3
FX4DN(B,F)061L
+3
FPMBN*024
—
FPMAN*030
—
FFMANP031
—
FV4CN(B,F)003L
—
FV4CNB006L
+5
FV4CN(B,F)003L
—
FPMBN*024
—
FFMANP036
—
FV4CN(B,F)005L
+3
FX4DN(B,F)043L
—
FV4CNF002L
—
FPMBN*030
—
FFMANP037
—
FV4CNB006L
+5
FX4DN(B,F)049L
+3
FX4DNF019L
—
FV4CN(B,F)003L
—
FPMAN*030
—
FV4CNF002L
—
FX4DN(B,F)061L
+5
FX4DNF025L
—
FV4CNF002L
—
FPMAN*036
—
FX4DN(B,F)037L
—
FX4DN(B,F)031L
—
FPMBN*030
—
FX4DN(B,F)043L
—
FX4DN(B,F)037L
+5
FV4CN(B,F)003L
—
FX4DN(B,F)049L
+3
FX4DNF025L
—
FV4CN(B,F)005L
+5
FV4CNF002L
—
FX4DN(B,F)031L
—
FX4DN(B,F)037L
+3
FX4DN(B,F)043L
1 +3
Note: 37 Size model does not require any subcooling adjustment for various indoor matches.
Table 5 — Required Liquid Line Temperatures °F
LIQUID PRESSURE AT
SERVICE VALVE (PSIG)
REQUIRED SUBCOOLING TEMPERATURE (° F)
g
10
12
14
16
18
251
76
74
72
70
68
66
259
78
76
74
72
70
68
266
80
78
76
74
72
70
274
82
80
78
76
74
72
283
84
82
80
78
76
74
291
86
84
82
80
78
76
299
88
86
84
82
80
78
308
90
88
86
84
82
80
317
92
90
88
86
84
82
326
94
92
90
88
86
84
335
96
94
92
90
88
86
345
98
96
94
92
90
88
354
100
98
96
94
92
90
364
102
100
98
96
94
92
374
104
102
100
98
96
94
384
106
104
102
100
98
96
395
108
106
104
102
100
98
406
110
108
106
104
102
100
416
112
110
108
106
104
102
427
114
112
110
108
106
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
112
486
124
122
120
118
116
114
499
126
124
122
120
118
116
511
128
126
124
122
120
118
FINAL CHECKS
CARE AND MAINTENANCE
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 1/12—turn past finger
tight.
4. Leave Owner's Manual with owner. Explain system opera-
tion and periodic maintenance requirements outlined in
manual.
5. Fill out Dealer Installation Checklist and place in customer
file.
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.
PURON® (R-410A) QUICK REFERENCE GUIDE
• Puron refrigerant operates at 50-70 percent higher pressures than R-22. Be sure that servicing equipment and replacement
components are designed to operate with Puron
• Puron refrigerant cylinders are rose colored.
• Recovery cylinder service pressure rating must be 400 psig, DOT 4BA400 or DOT BW400.
• Puron 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 psig high side and 180 psig low side with 550 psig low —side retard.
• Use hoses with 700 psig service pressure rating.
• Leak detectors should be designed to detect HFC refrigerant.
• Puron, 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 Puron 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 filter 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 or properly sized Puron piston metering device..
• If indoor unit is equipped with an R-22 TXV or piston metering device sized for R-22 application, it must be changed to a hard
shutoff Puron 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 Puron into the atmosphere.
• Do not use capillary tube coils.
• Observe all warnings, cautions, and bold text.
Copyright 2017 Carrier Corp. • 7310 W. Morris St. • Indianapolis, IN 46231 Edition Date: 07/17
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
10
Catalog No: 25HCC—HPB-01SI
Replaces: 25HBC—CC—CE-01 SI