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7
RC
V
R
Y1
6
Y
F
G
GYO BWRH RC
1-STAGE, COOLING ONLY
Factory RH-RC Jumper Wire Installed
FAN
24V
POWER
COMMON
AIR
CONDITIONER
3, 4 WIRES
BLACK TERMINAL LETTERS ARE TYPICAL, GRAY TERMINAL LETTERS ARE BRAND SPECIFIC
2
X
C
WIRING DIAGRAM NOTES:
1. The BOLD lines are what you should be connecting to the terminals on this new thermostat.
2. The DASHED lines are optional depending upon your system type.
3. In many cases, the thin lines shown as “SYSTEM COMMON” will not be visible at the thermostat
location, they are located with your heating and cooling equipment.
4. For Heat Pumps, use the “B” or “O” wire, NOT BOTH. Typically neither are used in a conventional
system.
5. If “Y” and “C” wires are both present, then “C” is a common wire.
6. If you have a “B” wire in your system which is used as a common wire, connecting it to the “B”
terminal on this thermostat may damage your system and/or the thermostat.
W1
4
W
RH
V
R
F
G
GYO BWRH RC
HEATING ONLY (INCLUDING MILLIVOLT)
(2-WIRE HEAT USE “RH” & “W”)
Factory RH-RC Jumper Wire Installed
FAN
24V
POWER
COMMON
HEATER
2, 3, 4 WIRES
BLACK TERMINAL LETTERS ARE TYPICAL, GRAY TERMINAL LETTERS ARE BRAND SPECIFIC
FAN WIRE
MAY NOT BE
PRESENT IN
ALL SYSTEMS
1
X
C