898150-UIM-B-0113
Johnson Controls Unitary Products
5
SECTION VI: SPECIFICATIONS
POWER SUPPLY AND INDOOR/OUTDOOR WIRE
CONNECTION
• The system should be powered from a dedicated circuit.
• Wiring work should be based on applicable technical standards.
• Wiring connections should be made following the provided
diagrams.
• Make sure all electrical connections are securely tightened.
Solid conductor AWG14 or stranded conductor AWG14 are the MINI-
MUM allowable wire sizes. There are some applications that will require
larger gauge conductors depending on the voltage and amperage rat-
ings on the data plate and the distance that the conductors will be
routed. It is the installing contractor's responsibility to properly size the
electrical conductors for the equipment and for the application.
All of the indoor units and outdoor units should have the electrical con-
ductors sized using the National Electrical Code (NEC) and the local
authority having jurisdiction whichever is more stringent. If the equip-
ment is installed outside of the United States, all local codes within the
country of origin must be followed.
The Ductless indoor units
must have a minimum of 14 gauge, 600
volt double insulated copper conductors. The conductors for the indoor
unit can be either solid or stranded copper. When possible the indoor
unit should have stranded wire for the communication to ensure proper
communication between the indoor and outdoor unit(s).
The Ductless outdoor units
must have a minimum of 12 gauge, 600
volt double insulated copper conductors with the exception of the fol-
lowing models: DHMF30CMM42Q1, DHMF36CMM42Q1 and
DHMF42CMM42Q1, which require 10 gauge wire. The conductors for
the outdoor unit should be solid or stranded copper conductors.
Connecting Wires and the Ground Wire
• Use double insulated copper wire with 600V insulation.
• Use copper conductors only.
• Follow all local electrical codes.
Power Supply Cable and Ground Wire
• Use copper conductors only.
• Follow all local electrical codes.
SECTION VII: REFRIGERANT LINE SET
REQUIREMENTS
• To prevent condensation, insulate the two refrigerant pipes.
• Refrigerant pipe bending radius must be 4 in. (100 mm) or more.
The listed wire sizes are only minimum requirements, as previously
stated, the conductors for both indoor and outdoor units must be
sized using the NEC and local authority having jurisdiction.
NOTICE
TABLE 4:
Heat Pump Electrical Specifications
INDOOR UNIT
Heat Pumps
DHPM09NWM42Q1 DHPM12NWM42Q1 DHPM18NWM42Q1
Power Supply (V, Phase, Hz)
208/230V/1
208/230V/1
208/230V/1/60HZ
Min. Circuit Ampacity
10
10
16A
Fan Motor (F.L.A)
0.2
0.2
0.28A
OUTDOOR UNIT
Heat Pumps
DHMF18CMM42Q1 DHMF24CMM42Q1 DHMF30CMM42Q1
DHMF36CMM42Q1
DHMF42CMM42Q1
Power Supply (V, Phase, Hz)
Max. Fuse Size (time delay) (A)
20A
30A
45A
product under development
40A
Min. Circuit Ampacity
15A
20A
26A
product under development
26A
Fan Motor (F.L.A)
0.54A
0.59A
0.59A
product under development
1.1A
Compressor
R.L.A
9.56A
14.69A
19.62A
product under development
19.07A
L.R.A
/
/
/
/
/
The the indoor unit is powered from the outdoor unit, depending on
local code, a disconnect switch needs to be installed to a power sup-
ply circuit.
NOTICE
Be sure to use the insulation of specified thickness (refer to Table 5).
Excessive insulation may cause incorrect installation of the indoor
unit, and too little insulation may cause condensate to form.
• The unit has flared connections on both indoor and outdoor sides
• Remove the valve cover from the outdoor unit then connect the
pipe
• Refrigerant pipes are used to connect the indoor and outdoor units
• Be careful not to crush or over bend the pipe in pipe bending
• Refrigerant adjustment
• If pipe length exceeds 25 ft. (7.5 m), additional refrigerant (R410A)
charge is required (The outdoor unit is charged with refrigerant for
pipe length up to 25 ft. [7.5 m]).
TABLE 5:
Insulation Thickness & Material Information
Pipe
Outside Diameter
Minimum Wall
Thickness
Insulation
Thickness
Insulation
Material
Inch (mm)
Liquid Line
.375 (9.52)
0.0315 (0.8)
0.315 (8)
Heat Resistant Foam Plastic
0.045 Specific Gravity
Gas Line
.625 (15.9)
0.0394 (1.0)
0.315 (8)
