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18 U35 FPI Direct Vent Gas Insert
WIRING DIAGRAMS
INSTALLATION
CAUTION: Label all wires prior
to disconnection when servicing
controls. Wiring errors can cause
improper and dangerous operation.
This heater does not require a 120V A.C. supply
for operation. However, a 120V A.C. power
supply is needed for the fan/blower operation.
WARNING: Electrical Grounding Instructions
This appliance is equipped with a three pronged
(grounding) plug for your protection against shock
hazard and should be plugged directly into a properly
grounded three-prong receptacle. Do not cut or remove
the grounding prong from this plug.
Caution: Ensure that the
wires do not touch any
hot surfaces and are
away from sharp edges.
For NATURAL GAS Units and Units NOT Equipped with DC Spark Boxes