Owner`s manual

DV450S DIRECT VENT ROOM HEATER
01-01 Page 27 29863C
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. See Table 1.
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. Reference Table 2.
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.