Samsung SER 450, Installation Manual

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18
fantech
W
R
G
C
Y
W R G Y
Alternate Furnace Interlock Wiring
THERMOSTAT
TERMINALS
FURNACE
24-VOLT
TERMINAL BLOCK
FOUR
WIRE
TWO WIRE
heating only
TWO
WIRE
COOLING SYSTEM
RV-CTRL
24VAC
Alternate Furnace Interlock Wiring (w/Damper)
W
R
G
C
Y
W
R G
Y
THERMOSTAT
TERMINALS
FURNACE
24-VOLT
TERMINAL BLOCK
FOUR
WIRE
TWO WIRE
heating only
TWO
WIRE
COOLING SYSTEM
SHUTOFF
DAMPER
SHUTOFF
DAMPER
RV-CTRL
24VAC
NC
COIL
CONTROL RELAY
(TERMINAL LABELING MAY VARY)
R C
NO COM
WIRING DIAGRAM
(CONT'D)
WIRING DIAGRAM TO
FURNACE
ALTERNATE FURNACE
CONNECTION:
On some newer furnaces and older
thermostats, energizing the R and G
terminal at the furnace has the effect
of energizing the Y at the thermostat
and thereby turning on the cooling
system. If you identify this type of
thermostat, you must use the
“Alternate Furnace Interlock Wiring”
As per building codes and installation requirements for combustion appliances:
Air return ducts, or openings for air return, should not be placed in enclosed spaces containing combustion
appliances that are subject to spillage.