Troubleshooting Guide - Millivolt; Troubleshooting The Millivolt Gas Control System - Superior DRT35STDMN Installation And Operation Instructions Manual

Innovative Hearth Products
Superior DRT35 See Through and Peninsula Direct Vent Gas Fireplace
TM

TROUBLESHOOTING THE MILLIVOLT GAS CONTROL SYSTEM

Note: Before troubleshooting the gas control system, be sure external gas shut off valve (located at gas supply inlet) is
in the "ON" position.
Important: Valve system troubleshooting should only be accomplished by a qualified service technician.
SYMPTOM
1. Spark ignitor will not light
pilot after repeated triggering
of ignitor button.
2. Pilot will not stay lit after
carefully following the light-
ing instructions.
3. Pilot burning, no gas to
burner, Valve knob "ON,"
Wall Switch "ON."
4. Frequent pilot/burner outage
problem.
64
POSSIBLE CAUSES
A. Defective ignitor
(no spark at electrode).
B. Defective or misaligned electrode
at pilot (spark at electrode).
C. Gas supply pressure errant.
D. Pilot orifice plugged.
A. Defective pilot generator
(thermocouple).
A. Wall switch or wires defective.
B. Thermopile may not be generating
sufficient millivoltage.
C. Plugged burner orifice.
A. Pilot flame may be too low or
blowing (high) causing the pilot/
valve safety to drop out.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Installation and Operation Instructions
CORRECTIVE ACTION
Check for spark at electrode and pilot; if no spark and electrode
wire is properly connected, replace ignitor.
Using a match, light pilot. If pilot lights, turn off pilot and trig-
ger the ignitor button again. If pilot lights, an improper gas
mixture caused the bad lighting and a longer purge period is
recommended. If pilot will not light – check gap at electrode and
pilot – should be 1/8" to have a strong spark. If gap measures
1/8", replace pilot (Figure 86 on page 56).
Check inlet gas pressure. It should be within the limits as
marked on the rating plate.
Clean or replace pilot orifice.
Check pilot flame, it must impinge on thermocouple (Figure
86 on page 56) Clean and/or adjust pilot for maximum flame
impingement on thermocouple. Ensure that the connection
between the valve and thermocouple are tight and secure.
Check wall switch and wires for proper connections. Jumper
wire across terminals at wall switch, if burner comes on, re-
place defective wall switch. If okay, jumper wires across wall
switch wires at valve, if burner comes on, wires are faulty or
connections are bad.
Check thermopile with millivolt meter. Take reading at thermo-
pile terminals of gas valve. Should read 325 millivolts minimum
with optional wall switch "OFF." Replace faulty thermopile if
reading is below specified minimum.
Check burner orifice for stoppage and remove.
Clean and/or adjust pilot flame for maximum flame impinge-
ment on thermocouple (Figure 86 on page 56).
900300-00, 02/2015