Heat & Glo Fireplace ST-38HV-AU - Manual (Page 23)

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2.0 OPERATING INSTRUCTIONS
This appliance is a balanced flue heater and is designed
to operate with all combustion air being siphoned from
the outside of the building and all exhaust gases ex-
pelled to the outside of the building.
WARNING: THIS UNIT IS NOT FOR USE
WITH SOLID FUEL.
The control system for these models is a millivolt type.
It consists of a gas control valve/variable regulator, a
standing pilot assembly, a thermopile/thermocouple
assembly, a piezo ignitor, an ON/OFF rocker switch,
and a safety high temperature limit switch. The con-
trols are located in the lower compartment behind the
lower grille. Access to this compartment is gained by
rotating the grille up. See Figure 1.
WARNING: DO NOT CONNECT 220-240
VAC TO THE GAS CONTROL VALVE OR
CONTROL WIRING SYSTEM OF THIS UNIT.
The gas control system is wired so the thermopile, when
heated with the pilot light, will provide approximately
350 to 500 millivolts. This activates the gas control valve.
See Figure 28 for appliance wiring diagram.
When lit for the first time, the appliance will emit a slight
odor for an hour or two. This is due to paint and lubri-
cants used in the manufacturing process. Additionally,
for the first few minutes after each lighting, vapor may
condense and fog the glass and the flames may be
blue. After a few minutes this moisture will disappear
and within 15-30 minutes the flames should become
yellow.
The heater may produce a noise, caused from metal
expansion and contraction as it heats up and cools
down. This noise is similar to one that a furnace or heat
duct may produce and does not affect the operation or
longevity of the heater.
FIGURE 26
FIGURE 27
MAKE SURE THE FLAMES
ARE STEADY—NOT
LIFTING OR FLOATING.
1.8 INSTALLER TESTING
The space heater must be tested and be operating ac-
cording to manufacturers specifications prior to the in-
staller leaving the site. Note: the tips of the flames
should never hit the top of the firebox after the unit has
warmed up. Please contact your dealer or a qualified
service person to replace injector or adjust valve.
Upon completing the gas line connection, a small
amount of air will be in the lines. When first lighting the
pilot light, it will take a few minutes for the lines to
purge themselves of this air. Once the purging is com-
plete, the pilot and burner will light and operate as indi-
cated in the Lighting Instructions.
Subsequent lightings of the appliance will not require
such purging.
CAUTION: DURING THE INITIAL PURGING AND
SUBSEQUENT LIGHTINGS, NEVER ALLOW THE
GAS VALVE CONTROL KNOB TO REMAIN DE-
PRESSED IN THE "PILOT" POSITION WITHOUT
PUSHING THE RED IGNITOR BUTTON AT LEAST
ONCE EVERY SECOND.
Follow the Safety Information and Lighting Instructions
pages of this manual to light the appliance.
To obtain proper operation, it is imperative that the pilot
and main burner flame characteristics are steady, not
lifting or floating. Typically, the top 3/8-inch (10mm) at
the pilot generator should be engulfed in the pilot flame.
(Figure 26.)
Burner flame patterns are shown in Figure 27.
Follow Section 3.5 TROUBLESHOOTING for adjusting
the appliance to operate properly.
Standing Pilot