29
WIRING
WARNING:
Turn o
ff
electric power
at the fuse box or service panel before making
any electrical connections. Also, the ground
connection must be completed before making line
voltage connections. Failure to do so can result in
electrical shock, severe personal injury, or death.
Control Wiring
Running low-voltage wires in conduit with line
voltage power wires is not recommended. Low-
voltage wiring may be run through the insulated
plastic bushing provided in the 7/8" [19 mm]
hole in the base panel, up to and attached to
the pigtails from the bottom of the control box.
Conduit can be run to the base panel if desired by
removing the insulated bushing.
A thermostat and a 24-volt, 40 VA minimum
transformer are required for the control circuit
of the system. The furnace or the air handler
transformer may be used if sufficient. See the
wiring diagram for reference. Use “Wire Size” table
on this page to size the 24-volt control wiring.
Do not use phone cord to connect indoor and
outdoor units and thermostat. This could damage
the controls and may not be adequately sized for
the control’s electrical load.
FIELD WIRE SIZE FOR 24-VOLT THERMOSTAT CIRCUITS
(1) Wire length equals twice the run distance.
NOTICE: Do not use control wiring smaller than No. 18
AWG between thermostat and outdoor unit.
Typical Noncommunicating
Thermostat Wiring Diagrams
The following figures show the typical wiring
diagrams for RH1T; RHIV air handlers and 1-stage
heat pump and dual fuel applications with a gas
furnace and 1-stage heat pump. Cooling and
heat pump airflows may need to be adjusted
for homeowner comfort once the system is
operational.
Control Wiring
WIRE COLOR CODE
BK – BLACK GY – GRAY W – WHITE
BR – BROWN O – ORANGE Y – YELLOW
BL – BLUE PR – PURPLE
G – GREEN R – RED
B
W2
G
Y
W1
B
ODD
C
R
Air Handler
Y G
W2
E
Heat Pump Thermostat
Heat Pump
Outdoor Unit
C
R
Y
B
R
D
C
Y
Field Installed
Line Voltage
-
WIRING INFORMATION
Factory Standard
-
WH/BL
GR/BK
YL
WH/BK
GR/YL
BR
BL
RD
YL/BL
Optional Field Installed Jumper (see note 1)
1
*
*
* 2
*Not present on all
air-handler models.
OPTIONAL
- 1 STAGE HEAT
YL
BR
BL
RD
PR
NOTES:
1. Jumper “E” to “W2” on
thermostat to transfer
control of supplemental
heat to 1st stage when
the emergency heat
switch is on.
2. This wire turns on elec-
tric heat strip during
defrost, omit for most
economical operation.
WIRE COLOR CODE
BK = BLACK
BL = BLUE
BR = BROWN
GR = GREEN
PR = PURPLE
RD = RED
WH = WHITE
YL = YELLOW
*
*If maximum outlet temperature rise is
desired, it is recommended that W1 and
W2 be jumpered together.
TYPICAL
CONTROL WIRING FOR AIR HANDLER
Thermostat
oad (amps)
SOLID COPPER WIRE – AWG.
3.0 18 16 14 12 10 10 10
2.5 18 16 14 12 10 10 10
2.0 18 16 14 12 10 10 10
20 50 100 150 200 250 300
[6] [15] [30] [46] [51] [76] [91]
Length of Run – Feet [m] (1)
Wiring
Summary of Contents for RP13
Page 50: ...50 FOR SINGLE PHASE WITH PSC FAN MOTORS WIRING DIAGRAMS Wiring Diagrams...
Page 51: ...51 Wiring Diagrams WIRING DIAGRAMS 3 PHASE 208 230V MODELS...
Page 52: ...52 Wiring Diagrams WIRING DIAGRAMS FOR 3 PHASE 460 575V...
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