BLD2022-1727_Manufacturer_Specifications_and_Installation_Instructions_12.19.2022_2.55.23_PM_3276719Installation Instructions
Fig. 1 —Size 36K
1.,1 ,� W
Fig. 2 —Sizes 48K and 58K
NOTE: Read the entire instruction manual before starting
the installation.
NOTE: Images are for illustration purposes only. Actual
models may differ slightly.
TABLE OF CONTENTS
SAFETY CONSIDERATIONS........................................................2
PARTSLIST....................................................................................3
SYSTEM REQUIREMENTS...........................................................4
WIRING...........................................................................................4
DIMENSIONS..................................................................................5
CLEARANCES................................................................................7
INSTALLATION TIPS....................................................................8
ELECTRICAL DATA......................................................................10
CONNECTION DIAGRAMS..........................................................10
SYSTEM VACUUM AND CHARGE.............................................10
START-UP.......................................................................................11
OUTDOOR UNIT DIAGNOSTIC GUIDES...................................12
Specifications subject to change without notice.
SAFETY CONSIDERATIONS
Installing, starting up, and servicing air- conditioning equipment
can be hazardous due to system pressures, electrical components,
and equipment location (roofs, elevated structures, etc.).
Only trained, qualified installers and service mechanics should
install, start- up, and service this equipment.
Untrained personnel can perform basic maintenance functions such
as coil cleaning. All other operations should be performed by
trained service personnel only.
When working on the equipment, observe the precautions in the
literature and on tags, stickers, and labels attached to the
equipment.
Follow all safety codes.Wear safety glasses and work gloves. Keep
a quenching cloth and a fire extinguisher nearby when brazing.
Use care in handling, rigging, and setting bulky equipment.
Read these instructions thoroughly and follow all warnings or
cautions included in literature and attached to the unit. Consult
local building codes and National Electrical Code (NEC) for
special requirements. 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.
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.
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage or
improper operation.
Do not bury more than 36 in. (914 mm) of refrigerant pipe in the
ground. If any section of pipe is buried, there must be a 6 in. (152 mm)
vertical rise to the valve connections on the outdoor units. If more
than the recommended length is buried, refrigerant may migrate to the
cooler buried section during extended periods of system shutdown.
This causes refrigerant slugging and could possibly damage the
compressor at start-up.
Specifications subject to change without notice. 38MBR-03SI
PARTS LIST
Table 1 —Parts List
PART NO.
PART NAME
QTY.
1
Outdoor unit
1
-
Literature package including installation instructions and warranty
1
-
Grommet to secure the outdoor unit (helps with vibration prevention during unit operation)
4
-
Drain Joint
1
-
Drain Hose
1
Fig. 3 —Parts List
NOTE:
- If the outdoor unit is higher than the indoor unit, prevent rain from flowing into the indoor unit along the connection pipe by making a
downward arc in the connection pipe before it enters the wall to the indoor unit. This ensures that rain drips from the connection pipe
before it enters the wall.
- Piping and the interconnecting wiring are field supplied.
- The illustration above is only a sketch. Different models may be slightly different.
The following units are covered in these installation instructions.
Table 2 — Unit Sizes
SYSTEM TONS
KBTUH
VOLTAGE - PHASE
OUTDOOR MODEL
3
36,000
208/230 - 1
38MBRQ36A- - 3
4
48,000
208/230 - 1
38MBRQ48A- - 3
5
58,000
208/230 - 1
38MBRQ58A- - 3
38MBR-03SI Specifications subject to change without notice.
SYSTEM REQUIREMENTS
Allow sufficient space for airflow and service of the unit. See Fig. 6 for the required minimum distances between the unit, walls or ceilings.
Piping
IMPORTANT: Both refrigerant lines must be insulated separately.
Table 3 contains piping information for the product covered within this document.
Table 3 — Piping and Refrigerant Information
SYSTEM SIZE
Min. Piping Length
36K
48K
58K
ft(m)
10(3)
10(3)
10(3)
Standard Piping Length
ft(m)
25(7.5)
25(7.5)
25(7.5)
Max. outdoor - indoor height difference (OU higher than IU)
ft(m)
98(30)
98(30)
98(30)
Max. outdoor - indoor height difference (IU higher than OU)
ft(m)
98(30)
98(30)
98(30)
PIPING
Max. Piping length with no additional refrigerant charge
ft(m)
26(8)
26(8)
26(8)
Max. Piping Length
ft(m)
213(65)
213(65)
213(65)
Additional refrigerant charge
(between Standard - Max piping length)
Oz/ ft(g/m)
0.32 (30)
0.32(30)
0.32(30)
Gas Pipe (size - connection type)
in(mm)
5/8(16)
5/8(16)
3/4(19)
Liquid Pipe (size- connection type)
in(mm)
3/8(9.52)
3/8(9.52)
3/8(9.52)
REFRIGERANT
Refrigerant Type
- -
R410A
R410A
R410A
Charge Amount
Lbs(kg)
6.72(3.05)
9.26(4.2)
10.19(4.62)
All outdoor units have an electronic expansion valve to manage the refrigerant flow of the fan coil connected.
WIRING
All wires must be sized per NEC (National Electrical Code) or
CEC (Canadian Electrical Code) and local codes. Use Electrical
Data table MCA (minimum circuit amps) and MOCP (maximum
over current protection) to correctly size the wires and the
disconnect fuse or breakers respectively.
SIZES 36 - 58 RECOMMENDED
CONNECTION METHOD FOR POWER AND
COMMUNICATION WIRING
Power and Communication Wiring:
The main power is supplied to the outdoor unit. The field supplied
power wiring from the outdoor unit to the indoor unit consists of
three (3) wires and provides the power for the indoor unit. Two
wires are high voltage AC power and one is a ground wire. To
minimize voltage drop, the factory recommended wire size is 14/2
stranded with a ground.
Communication Wiring:
A separate shielded stranded copper conductor only, with a 600 volt
rating and double insulated copper wire, must be used as the
communication wire from the outdoor unit to the indoor unit.
Please use a separate shielded 16GA stranded control wire.
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage or
improper operation.
Wires should be sized based on NEC and local codes.
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage or
improper operation.
Be sure to comply with local codes while running wire from the
indoor unit to the outdoor unit.
Every wire must be connected firmly. Loose wiring may cause the
terminal to overheat or result in unit malfunction. A fire hazard may
also exist. Ensure all wiring is tightly connected.
No wire should touch the refrigerant tubing, compressor or any
moving parts.
Disconnecting means must be provided and shall be located within
sight and readily accessible from the air conditioner.
Connecting cable with conduit shall be routed through the hole in the
conduit panel.
4 Specifications subject to change without notice. 38MBR-03SI
DIMENSIONS
Size 36K
Ln
N
Fig. 4 —Size 36K
Table 4 — Dimensions 36K
UNIT SIZE
WIDTH IN (MM)
DEPTH IN (MM)
HEIGHT IN (MM)
L1 IN (MM)
L2 IN (MM)
WEIGHT LB (KG)
36K
37.24 (946)
16.14 (410)
31.89 (810)
26.50 (673)
15.87 (403)
136.47 (61.9)
38MBR-03SI Specifications subject to change without nofice.
Sizes 48K and 58K
52AS In
(t3}imN
i
i
I
1
i
,
1
I
I
I
I
I
17.6t1n
-----i.46mRa ---.
DETAIL 8 kiln
(67M*
0
37.22 In
((lllu.!,�1u111(,,, r.�;vi�>�,n„1„um111111'I
\ r
illU!!f{ii(u(w!!�.�f���� nmtn11111V11111ti�
I,ii1111114tntu,�, ��,�p„ 'nlu011�j!!!!lI!l
LI 2196In
I (634 awn) _..
40.571n
--
(1030mm) -
u 15901n
(404 mm)
i
I
I
OCTAL A
Am In
—
I'611s1'1
I
--�
leis
plsrN
Pon%
` 0"00
Fig. 5
—Sizes 48K and 58K
Table 5 —
Dimensions 48K and 58K
UNIT SIZE
WIDTH IN (MM) DEPTH IN (MM)
HEIGHT IN (MM)
L1 IN (MM)
L2 IN (MM)
OPERATING
WEIGHT LB (KG)
48K
37.22 (945)
15.58 (396)
52.48 (1333)
24.96 (634)
15.90 (404)
217.4 (98.6)
58K
37.22 (945)
15.58 (396)
52.48 (1333)
24.96 (634)
15.90 (404)
217.4 (98.6)
6 Specifications subject to change without notice. 38MBR-03SI
CLEARANCES
H
Air -inlet
Fig. 6 — Outdoor Unit Clearances
Table 6 — Outdoor Unit Clearance Dimensions
UNIT
MINIMUM VALUE
IN. (MM)
A
24 (610)
B
24 (610)
C
24 (610)
D
4 (101)
E
4 (101)
931n (25cm)
or more for
properairflow
24in (61cm) or
more is
98in (25cm)'
or more for proper airflow
24in (61cm)
or more is
recommended
for service
0
more
69in(160cm) 24in(60cm)
or more 0na or more
multiple parallel
unit arrangement
24in (61cm) or more
on a single parallel
unit arrangement
Fig. 7 —Clearances for multiple units
I (48cm) or more
on a multiple parallel
unit arrangement
4in (10cm) or more on
a single parallel unit
arrangement
38MBR-03SI Specifications subject to change without notice.
INSTALLATION TIPS
Ideal installation locations include:
Outdoor Unit
• A location which is convenient to installation and not exposed to
strong winds.
• A location which can bear the weight of the outdoor unit and
where the outdoor unit can be mounted in a level position.
• A location which provides appropriate clearances (see Fig. 6).
• Do not install the indoor or outdoor units in a location with special
environmental conditions. For those applications, contact your
Ductless representative.
OUTDOOR UNIT INSTALLATION
1. Use a rigid base to support the unit in a level position.
2. Locate the outdoor unit and connect piping and wiring.
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage or
improper operation.
In regions with snowfall and cold temperatures, avoid installing the
outdoor unit in areas where it can be covered by snow. If the outdoor
unit is installed in areas where heavy snow is expected, a field
supplied ice or snow stand and/or field supplied -installed wind baffle
should be installed to protect the unit from snow accumulation and/or
blocked air intake. Blocking the air intake may result in reduced
airflow, significantly reduced performance and damage to the
equipment.
Strong
wind 0
0 X
Fig. 8 -High Wind Installation
MAKE REFRIGERANT PIPING
CONNECTIONS (OUTDOOR UNIT)
IMPORTANT: Use refrigeration grade tubing ONLY. No
other type of tubing may be used. Use of other types of
tubing will void the manufacturer's warranty.
Do not open the service valves or remove the protective caps from the
tubing ends until all connections are made.
Bend the tubing with bending tools to avoid kinks and flat spots.
Keep the tubing free of dirt, sand, moisture, and other contaminants to
avoid damaging the refrigerant system.
Avoid sags in the suction line to prevent the formation of oil traps.
Insulate each tube with a minimum 3/8-in. (10 mm) wall thermal pipe
insulation. Inserting the tubing into the insulation before making the
connections will save time and improve installation quality.
1. Remove the service valve cover, if provided with the unit.
2. Cott the pipe, with a pipe cutter, at 90 degrees (see Fig. 9).
3. Remove the service connection, if provided with the unit.
4. Remove all the burrs from the cut cross section of the pipe avoiding
any burrs inside the tubes.
5. Remove the flare nuts attached to the indoor and outdoor units.
6. Install the correct size flare nut onto the tubing and make a flare
connection. Refer to Table 7 for the flare nut spaces.
Table 7 - Flare Nut Spacing
OUTER DIAM. (MM)
A (MM)
MAX.
MIN.
01/4"(6.35)
0.05 (1.3)
0.03 (0.7)
03/8"(9.52)
0.06 (1.6)
0.04 (1.0)
01/2"(12.7)
0.07 (1.8)
0.04 (1.0)
05/8"(15.88)
0.09 (2.2)
0.08 (2.0)
HZBar.
ndle
a
Bar Yoke
Cone
Copper pipe
Clamp handle Red arrow mark
Fig. 10 -Flare Nut Spacing
7. Apply a small amount of refrigerant oil to the flare connection on
the tubing.
8. Align the center of the pipes and/or service valve.
Indoor unit tubing " Flare nut Piping
Fig. 11 -Align Pipe Center
9. Connect both the liquid and gas piping to the indoor unit.
10. Tighten the flare nut using a torque wrench as specified in Table 8.
11. Complete the installation.
Table 8 - Tightening Torque
PIPE DIAMETER
INCH (MM)
TIGHTENING
TORQUE
FT -LB
N-M
01/4" (6.35)
10 to 13
13.6 to 17.6
03/8" (9.52)
24 to 31
32.5 to 42.0
01/2" (12.7)
37 to 46
50.1 to 62.3
05/8" (15.88)
50 to 60
67.7 to 81.3
Flare nut
I
Coppertube
Fig. 12 -Tighten the Flare Nut
q� 90°
/
X X
oblique Roughness
X
Burr
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage or
improper operation.
Excessive torque can break the flare nut depending on installation
Fig. 9 -Cut
the pipe
conditions.
Specifications subject to change without notice. 38MBR-03SI
Install All Power and Interconnecting Wiring to
Outdoor Units
1. Mount the outdoor power disconnect.
2. Run the power wiring from the main box to disconnect per NEC
and local codes.
3. Remove the field wiring cover from the unit by loosening the
screws.
4. Remove the caps on the conduit panel.
5. Connect the conduit to conduit panel (see Fig.13).
6. Properly connect both the power supply and control lines to the
terminal block per the connection diagram for the appropriate unit
capacity and voltage.
7. Ground the unit in accordance with NEC and local electrical codes.
8. Use the lock nuts to secure the conduit.
9. Reinstall the field wiring cover.
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage or
improper operation.
Be sure to comply with local codes while running wire from indoor
unit to outdoor unit.
Every wire must be connected firmly. Loose wiring may cause the
terminal to overheat or result in unit malfunction. A fire hazard may
also exist. Therefore, ensure all wiring is tightly connected.
No wire should be allowed to touch the refrigerant tubing,
compressor or any moving parts.
Disconnecting means must be provided and shall be located within
sight and readily accessible from the air conditioner.
Connecting cable with the conduit shall be routed through hole in the
conduit panel.
Outdoor unit
Terminal B
Ore
r�s n )
'gym
Conduit
Fig. 13 —Field Wiring
panel
Drain Connections
Install drains must meet local sanitation codes.
Install the outdoor unit drain joint
Fit the seal into the drain joint, then insert the drain joint into the base
pan hole of the outdoor unit. Rotate 90' to securely assemble them.
Connect the drain joint with an extension drain hose to avoid
condensate from draining off the outdoor unit during the heating
mode.
—/Seal
Seal
Base pan Drain
joint
Fig. 14 —Drain Joint
NOTE: Images are for illustration purposes only.
EQUIPMENT DAMAGE HAZARD
In cold climates, ensure the drain hose is as vertical as possible to
ensure swift water drainage. If water drains too slowly, it can freeze
in the hose and flood the unit.
NOTE: Basepan built-in with multiple holes for proper
draining during defrost. For applications where it
is required to seal these holes, and re -direct the
condensate drain, rubber plugs are available
through RCD.
Table 9 — Base Pan Base Rubber Plugs
OUTDOOR UNIT
MODEL NUMBER
PER UNIT
BASE PAN BASE
RUBBER PLUGS RCD
PART NUMBER
QUANTITY
38MBRQ36A- - 3
12600801AO0117
5
38MBRQ48A- - 3
12600801AO0118
5
38MBRQ58A- - 3
12600801AO0118
5
38MBR-03SI Specifications subject to change without notice. 9
ELECTRICAL DATA
OUTDOOF
POWER SUPPLY
COMPRESSOR
OUTDOOR FAN MOTOR
Table 10 — Electrical Data
UNIT SIZE
36K
48K
58K
208/230 - 1 - 60
208/230 - 1 - 60
208/230 - 1 - 60
Max — Min" Oper. Voltage
253 - 187
253 - 187
253 - 187
MCA
30
35
35
MOCP
50
50
50
Volts- PH- Hz
208/230 - 1 - 60
208/230 - 1 - 60
208/230 - 1 - 60
RLA
8.85
11.86
11.86
FLA
1.21
1.17
1.17
Rated HP
0.16
0.14
0.14
Output
120
85
85
`Permissible limits of the voltage range at which the unit will operate satisfactorily.
LEGEND
FLA - Full Load Amps
MCA- Minimum Circuit Amps
MOCP - Maximum Over -Current Protection
RLA - Rated Load Amps
CONNECTION DIAGRAMS
CONNECTING CABLE
OUTDOOR TO INDOOR nauro�'sd0w�.
Indoor Unite Nonpolar R 85
Power Su Iy communication
Nonpolar R 485 Ta �40o Outdoor Unit
communication POW Power Supply
208-230.1.60 1 Low volts a
Low voltage I 208.230-1-60
Fig. 15 —Connection
Diagrams
NOTES:
1. Do not use the thermostat wire for any connection between indoor and outdoor units.
2. All connections between indoor and outdoor units must be as shown.
The connections are sensitive to polarity and will result in a fault code.
SYSTEM VACUUM AND CHARGE
7. The factory charge contained in the outdoor unit is good for up to
25 ft. (8 m) of line length. For refrigerant lines longer than 25 ft. (8
m), add refrigerant, up to the allowable length, as specified in the
System Requirements section.
8. Disconnect the charge hose from the charge connection of the low
side service valve.
9. Fully open service valves B and A.
UNIT DAMAGE HAZARD
10. Securely tighten the service valve caps.
Failure to follow this caution may result in equipment damage or
improper operation.
Outdoor Unit Refrigerant Indoor Unit
Never use the system compressor as a vacuum pump.
ig i e
Refrigerant tubes and the indoor coil should be evacuated using the
recommended 500 microns deep vacuum method. The alternate triple
Service Valve
evacuation method may be used if the procedure outlined below is
Fig. 16 —Service Valve
followed.
NOTE: Always break a vacuum with dry nitrogen.
Using Vacuum Pump 500 microns Y Y
Low side valve O High side valve
1. Completely tighten flare nuts A, B, C, D, connect the manifold Charge hose
gage charge hose to a charge port of the low side service valve (see Charge hose
Fig. 16). ,Vacuum pump
2. Connect the charge hose to vacuum pump.
3. Fully open the low side of manifold gage (see Fig. 17).
Low side valve
4. Start the vacuum pump.
5. Evacuate using either the deep vacuum or triple evacuation method. Fig. 17 — Manifold
6. After evacuation is complete, fully close the low side of manifold
gage and stop the vacuum pump operation.
10 Specifications subject to change without notice. 38MBR-03SI
Deep Vacuum Method
Final Tubing Check
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 best
way to assure a system is free of air and moisture (see Fig. 18).
3500
LEAK IN
cn
SYSTEM
p 3000
L) 2500
2000
1500
VACUUM TIGHT
TOO WET
SYSTEM
0 1 2 3 4 5 6 7
MINUTES
Fig. 18 — Deep Vacuum Graph
Triple Evacuation Method
The triple evacuation method should only be used when the vacuum
pump is only capable of pumping down to 28 in. of mercury vacuum
and the system does not contain any liquid water.
Refer to Fig. 19 and proceed as follows:
1. Pump the system down to 28 in. of mercury and allow the pump to
continue operating for an additional 15 minutes.
2. Close the service valves and shut off the vacuum pump.
3. Connect a nitrogen cylinder and regulator to the system and open
until the system pressure is 2 psig.
4. Close the service valve and allow the system to stand for 1 hr.
During this time, dry nitrogen can diffuse throughout the system
absorbing moisture.
5. Repeat this procedure as indicated in Fig. 19. The system will then
be free of any contaminants and water vapor.
EVACUATE
BREAK VACUUM WITH DRY NITROGEN
WAIT
EVACUATE
BREAK VACUUM WITH DRY NITROGEN
WAIT
EVACUATE
CHECK FOR TIGHT, DRY SYSTEM
(IF IT HOLDS DEEP VACUUM)
RELEASE CHARGE INTO SYSTE
Fig. 19 — Triple Evacuation Method
IMPORTANT: Check to be certain factory tubing on both
the 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 the feeder tubes,
making sure wire ties on feeder tubes are secure and tight.
START-UP
Test Operation
Perform a test operation after completing a gas leak and electrical
safety check. See the indoor unit installation instructions and owner's
manual for additional start up information.
System Checks
1. Conceal the tubing where possible.
2. Make sure that the drain tube slopes downward along its entire
length.
3. Ensure all tubing and connections are properly insulated.
4. Fasten the tubes to the outside wall, when possible.
5. Seal the hole through which the cables and tubing pass.
Outdoor Unit
Are there unusual noises or vibrations during operation?
Explain the Following Items to the Customer (with
the aid of the Owner's Manual):
1. Explain care and maintenance.
2. Present the installation instructions to the customer.
38MBR-03SI Specifications subject to change without notice. l l
OUTDOOR UNIT DIAGNOSTIC GUIDES
For ease of service, the systems are equipped with a diagnostic code display LEDs on both the indoor and outdoor units. The outdoor diagnostic
is displayed on the outdoor unit microprocessor board.
There may be a few error codes displayed in the indoor unit that might relate to the outdoor unit's problems. If possible, always check the diag-
nostic codes displayed on the indoor unit first.
The diagnostic codes displayed on the outdoor units are listed on Table 11.
Table 11 — Unit Diagnostic Guides
DISPLAY
LED STATUS
E1
Communication malfunction between indoor and outdoor units.
FO
Protection of over - current
F1
Open circuit or short circuit of outdoor ambient temperature sensor T4
F2
Open circuit or short circuit of condenser coil temperature sensor T3
F3
Open circuit or short circuit of Compressor discharge temperature sensorT5
F4
Outdoor unit EEPROM error
F5
Outdoor fan speed has been out of control
PO
IPM malfunction
P 1
Over voltage or over low voltage protection
P2
High temperature protection of compressor top
P3
Outdoor low temperature protection
P4
Inverter compressor drive error
P7
Outdoor IGBT temperature sensor error
JO
High temperature protection of indoor coil in heating
11
Outdoor temperature protection of outdoor coil in cooling
J2
Discharge temperature protection
J 3
Protection of active PFC module
J4
Communication error between control board and IPM board
15
High - pressure switch protection
J6
Low- pressure switch protection
18
AC voltage protection
For additional diagnostic information, refer to the service manual.
Copyright 2018 CAC/BDP • 3300 Riverwood Parkway Atlanta GA, 30339 Edition Date: 09/18 catalog No. 38MBR-03SI
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Replaces: 38MBR-02SI