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DV425TR DIRECT VENT ROOM HEATER
02/01 Page 56 250-5533
Problem: Possible Cause: Solutions:
Thermostat/
Wall Switch
will not cycle
the Main
Burner (Cont.)
Main Burner lights
Main Operator Coil is Verify electrical resistance of the Main Operator the following
while in the defective. manner:
Pilot position. (A) Remove ALL WIRES! from the Operator Head.
(B) With an Ohm meter, measure electric resistance between
the TP and TH Terminals. If the resistance does not fall
within specification, replace the Valve.
Debris on Seat of Replace Valve.
Main Valve.
Main Seat blown out Replace Valve.
as a result of exposing
an LPG Gas Valve to
an unregulated line
pressure in excess
TROUBLE SHOOTING (continued)
Excessive Wire Make sure that all mV connections are made using wire of
Resistance. the proper size.
Valve Wired The Thermo-generator leads must be connected to the
Incorrectly. TPTH and TP connections of the Main Operator.
Thermostat Wires must be connected to
the TPTH and TP Terminals of the Valve.