12
PYROMASTER
®
UVHB20 Vent-Free Heaters
20001540
Maintenance
Keep the control compartment, logs and burner area
surrounding the logs clean by vacuuming or brushing at
least twice a year. THE LOGS CAN GET VERY HOT
— HANDLE ONLY WHEN COOL.
Always turn off gas to the pilot before cleaning. For
relighting, refer to lighting instructions located on the
front cover plate.
Never obstruct the flow of combustion and ventilation
air. Keep the front of the heater clear of all obstacles
and materials.
Leave at least 36" clearance from front of heater to
combustibles.
Cleaning the Standing Pilot
Control System
The burner and control system consists of:
• main burner
• pilot burner
• gas orifice
• thermopile
• combination millivolt gas valve
Most of these components may require only an occa-
sional checkup and cleaning and some may require
adjustment. If repair is necessary, it should be per-
formed by a qualified technician.
In order to properly clean the burner and pilot assembly,
turn off the gas to the unit, remove the logs exposing
the burner and pilot assembly. Clean all foreign materi-
als from the top of the burner. Check to make sure that
burner parts are clean. Visually inspect pilot. Brush or
blow away any dust or lint accumulation If pilot orifice is
plugged, disassembly may be required to remove any
foreign material from the orifice or tubing.
To obtain proper operation, it is imperative that the pilot
and burner's flame characteristics are steady, not lifting
or floating.
Typically, the top 1/8" of the thermopile should be
engulfed in the pilot flame. (Fig. 11)
The air shutter is set at the factory, no adjustment
should be necessary.
