Standard HVAC System
G Fan
W1 Heat Stage 1
Y1 Compressor Stage 1
R 24VAC Return
C 24VAC Common
Thermostat Connection
Y2 Compressor Stage 2
W2 Heat Stage 2
For single transformer systems
connect R wire to either RC or RH
terminal.
For systems with separate heating
& cooling transformers, connect
heating R to RH and cooling R to
RC.
NOTE! the RC=RH jumper
must be CUT on the thermostat
board.
Standard Gas/Electric HVAC System Wiring
Thermostat Setup:
Standard Gas/Electric HVAC Systems
For Single Stage Heat/Cool Systems:
Go to the Menu screen by pressing and holding the FAN button for 5 seconds
Press the down arrow to select the
SYSTEM
menu and press Select.
Set the following:
SYSTEM TYPE:
Set to
STANDARD
FAN TYPE:
Set to
GAS
for typical gas furnace (fan is controlled by the furnace)
Set to
ELECTRIC
for electric heat (fan on with heat call)
For Two Stage Heat/Cool Systems:
Go to
ADVANCED SYSTEMS SETTINGS
menu.
From the
Setup menu
screen, press and hold the Fan and Down arrow buttons
for 5 seconds. Use the Down arrow button to select the following:
2ND
STAGE HEAT ENABLE:
Enable second stage heating output
If a single stage heating system, leave this set to
N
If a 2 stage heating system, set to
Y
to enable.
2ND STAGE COOL ENABLE:
Enable second stage cooling output
If a single stage cooling system, leave this set to
N
.
If a two stage cooling system, set to
Y
to enable.
Default Thermostat Setup:
Type: Standard HVAC
Fan: Gas Heat
1 Stage heating
1 Stage cooling
No Setup change required for
this configuration
Thermostat back
Y2
Y1
G
RC
C
RH
W1
W2
/O
Typical thermostat wiring colors.
Caution: verify that original wiring
matches. Colors may be different.
Blue
Black/Brown
Red
White
Orange
Yellow
Green
C wire is not required for
battery operation.
C wire is required for 24VAC
operation.
Internal RC=RH jumper
DCN: 140-02121-06
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