Mastic Spark Modern Fires 91P - Manual (Page 34)

34 L100001 37
Figure 45 - Pilot Flame
Thermopile
Thermocouple
BURNER FLAME
The flames from the burner should be visually checked as
soon as the heater is installed and periodically during normal
operation. In normal operation, at full rate, and after operat-
ing for about 15 to 30 minutes, the flame should be yellow
and up to 8 inches high. See Figure 46.
NOTE: The type of installation, vent system
configuration, and wind effects may cause the flame
patterns to vary.
AIR SHUTTER ASSEMBLY
Air shutter is adjusted at factory: 1 /
8
" for natural gas and
propane gas
If necessary, change this by loosening nut and opening or
closing the air shutter more. See Figure 47.
Figure 46 - Burner Flame Appearance
CLEANING AND MAINTENANCE
BURNER, PILOT AND CONTROL COMPARTMENT
Keep the control compartment and burner areas clean by vacuuming or brushing at least twice a year.
Make sure the burner porting, pilot air opening and burner air opening are free of obstructions at all times.
PILOT FLAME
The flames from the pilot should be visually checked as soon as the heater is installed
and periodically during normal operation. The pilot flame must always be present
when the fireplace is in operation. See Figure 45. The pilot flame has three distinct
flames, one engulfing the thermopile, one engulfing the thermocouple, and the other
reaching to the main burner.
BURNER
Inspect area around the injector. Remove any lint or foreign material with a brush
or vacuum.
Turn off gas before servicing fireplace. It
is recommended that a qualified service
technician perform these check-ups at the
beginning of each heating season.
WARNING
Figure 47 - Adjusting Air Shutter
Nut
Shutter Opening