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8. TROUBLE SHOOTING GUIDE
SYMPTOMS
1. Pilot will not light
2. Pilot outage
3. Pilot flame will not stay lit when valve
knob is released
4. Burner goes out.
5. Main burner and pilot goes out.
6. Burner back-flashes or makes noise.
7. Yellow main burner flame.
8. Yellow pilot flame.
9. Poor thermostatic control.
10. Main burner will not light
8.1 MAINTENANCE
The efficiency of the heater can be impaired if it gets dirty. If the heaters are installed in areas where consider-
able dust is present in the air, periodic burner cleaning may be necessary. Dust may be entrained in the primary
air supply and deposited on the back side of the ceramic tiles. This can be very easily removed by cleaning the
ceramic face and the air inlet with a blast of low pressure
air, a maximum of 20 psi. Do not direct the air stream at
the gasket material between the tiles and burner body.
Occasionally pilots or the main burner refuse to function
properly after a summer shutdown. For the pilot, this prob-
lem can be corrected by removing the pilot burner and
cleaning out the gas passageways. The main burner pas-
sageways can be cleaned out by using a flexible brush
comparable to the type used to clean glass bottles. (In
several instances, small cocoons or spider webs have
been found present in these areas.) Preventative mainte-
.
nance is the best policy
a heating season.
Heaters should be cleaned once
POSSIBLE CAUSES OR CORRECTION
a. Make certain the gas supply is turned on.
b. Air in line. Continue to relight until air is purged.
c. Check for a blocked pilot orifice.
a. Improper pilot flame adjustment. Refer to Figure 7.
b. Check pilot generator contacts and tighten if necessary.
c. Defective pilot generator—replace.
d. Defective valve—replace
a. Improper pilot flame adjustment. Refer to figure 7.
b. Remove pilot orifice—check and clean—reinstall.
c. Defective thermostat—replace.
d. Defective valve—replace.
a. Thermostat satisfied—normal operation.
b. Defective valve—replace.
a. Improper venting or blocked flue. Correct venting
problem and relight.
b. Strong Wind conditions.—restart heater.
c. Make sure the gas supply is turned on.
a. Check burner and orifice for damage. Replace if necessary.
b. Check for cracked tile. Replace if necessary.
a. Check and clean burner and orifice.
b. Check line and manifold gas pressure.
a. Small yellow tip—normal operation.
b. Remove pilot orifice – check and clean—replace.
a. Check for proper setting.
b. Check wall thermostat section or gas valve assembly.
c. Replace thermostat section or gas valve assembly.
d. Check wall thermostat location.
a. Check thermostat setting.
b. Check to see if valve is in the ON position.
FIG. 7
(Thermocouple)
Page 7
ecoSchwank-MILLIVOLT / IL-MILLIVOLT Manual
IM090128
RD: JAN 2009
RL: 1D
BA
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