PCB0001C-01-BHP-PDII0614
V. Wiring Guide
1. Regular System, 1 Heating Unit
The first category of wiring configuration
schemes follows a single compressor, single
heating unit (non-Heat Pump) system, with
either a single shared transformer or two
separate transformers connected to RC1 and
RH1, respectively.
First, you will need to choose whether your
system has a separate transformer for the
Heating Unit and for the Compressor.
Optional outputs include Heating Stage 2,
Cooling Stage 2, Heating Stage 3, and
Economizer Damper Control. Refer to the
following chartswhile wiring up your system.
Screw
Terminal
Number
Connect To
Function
Std.
Wire Color*
1
Jumper to 4
RC2
Red
2
Jumper to 3
RH2
Red
3
*Either Jumper to 4
(Single Transformer)
OR
Heater Transformer
+24VAC (Dual
Transformer)
RH1
Red
4
Compressor
Transformer
+24VAC
RC1
Red
5
Compressor Control
Y
Yellow
6
Fan Control
G
Green
7
Heat Control
W
White
15
-24VAC (Ground)
C
Brown/Black
**
16
Indoor Temp Probe
T1in
Black*
17
Indoor Temp Probe
T2in
Yellow*
19
Indoor Temp Probe
T3in
Red*
Screw
Terminal
Number
Connect To
Function Proprietary
Wire Color
9
Heat Stage 2 Control
W2
N/A
10
Compressor Stage 2
Control
Y2
N/A
11
Outside
Temp/Humidity Probe
OT2in
Yellow
12
Heat Stage 3 Control
W3
N/A
13
Outside
Temp/Humidity Probe
OH1in
Green
14
Economizer Damper
Control
ECD
N/A
16
Outdoor
Temp/Humidity Probe
OT1in
Black
18
Humidifier Output
HUM
NA
19
Outdoor
Temp/Humidity Probe
OT3in
Red
**Note: Brown or Black are the most common
colors for 24VAC ground; however, white and
blue are also frequently used.
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Chart 3: Required Wiring for Single
Compressor, Single Heater Installations
Chart 4: Optional Wiring for Single
Compressor, Single Heater Installations
*
*
*Caution!
While there are some industry-wide
color-coding conventions, some thermostat makers do
color-coding conventions, some thermostat makers do
not follow these conventions, so it is imperative to record
the previous configuration (both color and function) so the
correct wire can be connected to the appropriate location
on Comfort Window's wall-plate.