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NOTE: This thermostat does not
have a setting for steam/
gravity air. Cycles would
not be long enough for
accurate temperature
control.
IMPORTANT
When using a high
efficiency furnace such as
a 90% or greater AFUE
(Average Fuel Utilization
Efficiency) unit, adjust
DIP switch 1 Off and
DIP switch 2 On.
THERMOSTAT BACK
1
1
DISPLAY F
3 - ON
2
2
DISPLAY C
3 - OFF
3
3
OFF ON
FUEL SWITCH
E
F
14
ON
HEATING
DIP SWITCH
SYSTEM
POSITION
WARM AIR
1 - ON
2 - ON
FURNACE
HOT WATER OR
1 - OFF 2 - ON
HIGH EFFICIENCY
ELECTRIC
1 - ON 2 - OFF
FURNACE
W
Y
G
W
Y
G
C
R
R
C
C
FUEL SWITCH
POSITION
F
F
E
R
C
M20638
69-1636-1
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