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CONDENSATE DRAIN
A condensate trap must be installed in the condensate drain. The
plumbing must conform to local codes.
CAUTION
!
Hand tighten only.
Use Teflon tape or pipe thread compound if needed.
SERVICE ACCESS
WARNING
!
Wear safety glasses and gloves when handling refrigerants. Failure
to follow this warning can cause serious personal injury.
Access to all serviceable components is provided at the following loca-
tions:
• Coil guards
• Unit top panel
• Corner posts
• Blower access panel
• Control access panel
• Indoor coil access panel
• Compressor access panel
• Heat section access panel
See Figure 3 for the location of these access locations and see Table 5
for minimum clearances.
CAUTION
!
This system uses R-410A Refrigerant which operates at higher pres-
sures than R-22. No other refrigerant may be used in this system.
Gauge sets, hoses, refrigerant containers and recovery systems
must be designed to handle R-410A. If you are unsure, consult the
equipment manufacturer. Failure to use R-410A compatible servicing
equipment may result in property damage or injury.
See Figure 13 for the R-410A Quick Reference Guide.
THERMOSTAT
The room thermostat should be located on an inside wall approximately
60 in. above the floor where it is not subject to drafts, sun exposure, or
heat from electrical fixtures or appliances. Sealant should be used
behind thermostat to prevent air infiltration. Follow manufacturer's
instructions enclosed with the thermostat for general installation proce-
dure. Color coded insulated wires (minimum No. 18 AWG) should be
used to connect thermostat to unit. See Figure 6. Do not use power
stealing thermostats.
POWER AND CONTROL WIRING
Field wiring to the unit must conform to provisions of the current NEC
ANSI/NFPA No. 70 or CEC and/or local ordinances. The unit must be
electrically grounded in accordance with local codes or, in their
absence, with the NEC/CEC. Voltage tolerances that must be main-
tained at the compressor terminals during starting and running condi-
tions are indicated on the unit Rating Plate and Table 1.
Johnson Controls Ducted Systems
The wiring entering the cabinet must be provided with mechanical
strain relief.
A fused disconnect switch should be field provided for the unit. If any of
the wire supplied with the unit must be replaced, replacement wire must
be of the type shown on the wiring diagram.
Electrical service must be sized properly to carry the load. Each unit
must be wired with a separate branch circuit fed directly from the main
distribution panel and properly fused.
Single point wiring requires the use of the single point wiring kit acces-
sory.
See Figures 6 and 7 for typical field wiring and refer to the appropriate
unit wiring diagram for control circuit and power wiring information.
Unit comes wired for 230-V power. If supply power is 208 V, wires con-
nected to the control transformer 230-V tap must be moved to the 208-
V tap.
Minimum wire size of 18 AWG wire should be used for all field
installed control wiring.
THERMOSTAT
W2
W
Y
O
R
C
G
NOTE:
Heat Anticipator should be set at 0.35 AMPS for all models
FIGURE 6: Typical Field Control Wiring Diagram for Heat Pump
Models
FIGURE 7: Typical Field Power Wiring Diagram
NOTICE
In some horizontal applications, the service disconnects on the elec-
tric heat kits must be rotated 180° so the up position of the discon-
nect is the ON position. This service disconnect orientation change is
required by UL1995, Article 26.19 (in reference to all circuit break-
ers).
5151094-UIM-H-0220
CONTROL HARNESS
BROWN
W2
WHITE
W
YELLOW
Y
ORANGE
O
RED
R
BLUE
C
GREEN
G
A0377-001
7
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