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PYROMASTER® UVHB10 Vent-Free Heaters
20004232
Operation
First Firing
Upon completing the gas line connection, a small
amount of air will be trapped in the line. When first
lighting the unit with pilot light, it will take a few minutes
to purge the trapped air. Once purging is complete, the
pilot and burner will light and operate as indicated in the
instruction manual. Subsequent lightings of the appli-
ance will not require purging.
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. After each
lighting, vapor may condense and fog the glass; this
moisture disappears within a few minutes of burning.
Flame Adjustment
Flame adjustment is accomplished by rotating the Hi/Lo
adjustment knob located near the center of the gas
control. (Fig. 10)
It is important to periodically perform a
visual check of the pilot and the burner
flames. (Figures 11 and 12)
HI
OFF
P
ILO
T
LO
Fig. 10 Flame adjustment on gas valve.
Piezo Ignitor
FP1036
Thermocouple
P103
Fig. 11 Proper pilot flame appearance.
When Used as a Heating Appliance
This appliance is equipped with a modulating valve
which controls the main burner by a thermostat. As the
room temperature increases, the flame will automati-
cally lower itself according to the control knob setting.
The thermostatic bulb is located under the log set. If the
main burner flame modulates down to a lower level
while the control knob is at a higher setting, the bulb
may need to be located outside the fireplace.
The SIT 'T' series valve operates from the full clockwise
'LOW' position to the full counterclockwise
'HIGH' position. (Refer to Page 3 for BTU rates.)
When used as an unvented heater, maximum benefit
will result when the fireplace flue damper is fully closed.
NOTE: For your safety, the appliance is equipped with
an oxygen depletion sensor. This device senses the
level of oxygen in the atmosphere and switches off the
gas supply in case the level of oxygen falls below a
safe level.
The appliance may be used as a heating appliance only
if unvented heating appliances are permitted by local,
state, and city codes. In locations that do not allow
unvented heaters, the chimney must have a permanent
chimney opening of not less than 29 square inches.
LG150
Fig. 12 Correct log flame appearance.
Yellow Tip
Blue