11
RFSUV34 Vent-Free Heater
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 and operating
instruction.
PILOT CONTROL SYSTEM
The burner and control system consists of:
• main burner • pilot burner
• gas orifice
• combination millivolt gas valve
Most of these components may require only an
occasional checkup and cleaning and some may
require adjustment. If repair is necessary, it
should be performed by a qualified technician.
In order to properly clean the burner and pilot
assembly, turn off the gas to the unit, remove the
window frame panel and logs exposing the burner
and pilot assembly. Clean all foreign materials
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.
Fig. 9. Proper pilot flame height.
PILOT ASSEMBLY
The air shutter is set at factory no adjustment
should be necessary.
It is important to periodically per-
form a visual check of the pilot and
the burner flames. See Figures 9
and 11.
Fig. 11. Approximate flame heights
RFSUV34
FLAME ADJUSTMENT
For units equipped with Hi/Lo valves, flame
adjustment is accomplished by rotating the Hi/Lo
adjustment knob located near the center of the
gas control. See Figure 10.
Fig. 10 Flame adjustment on gas valve (standing pilot only).
GF390
L
O
H
I
Turn
counterclockwise
to decrease
flame height.
Turn clockwise
to increase
flame height.
Turn
counterclockwise
to decrease flame
height
Turn clockwise to
increase flame
height
