Desa Tech RADIANT FLAME RFN28TD - Manual (Page 14)

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VENT-FREE NATURAL GAS HEATER
15,000 TO 28,000 BTU/HR
TO TURN OFF GAS
TO APPLIANCE
Shutting Off Heater
1. Turn control knob clockwise
Clockwise
to the OFF position.
2. Turn off all electric power to the ap-
pliance if service is to be performed.
Shutting Off Burner Only (pilot
stays lit)
Turn control knob clockwise
Clockwise
to
the PILOT position.
MANUAL LIGHTING
PROCEDURE
1. Remove front panel (see Figure 2,
page 4).
2. Follow steps 1 through 5 under
Lighting Instructions.
3. With control knob pressed in, strike
match. Hold match to pilot until pi-
lot lights.
4. Keep control knob pressed in for 30
seconds after lighting pilot. After 30
seconds, release control knob.
5. Replace front panel.
4. Wait five (5) minutes to clear out any
gas. Then smell for gas, including near
the floor. If you smell gas, STOP! Fol-
low “B” in the safety information on
page 13, column 3. If you don’t smell
gas, go to the next step.
5. Turn control knob counterclockwise
C-clockwise
to the PILOT position. Press
in control knob for five (5) seconds
(see Figure 23).
Note: You may be running this
heater for the first time after hook-
ing up to gas supply. If so, the con-
trol knob may need to be pressed in
for 30 seconds. This will allow air to
bleed from the gas system.
6. With control knob pressed in, push
down and release ignitor button. This
will light pilot. The pilot is attached
to the front of burner. If needed, keep
pressing ignitor button until pilot
lights.
Note: If pilot does not stay lit, refer
to Troubleshooting, pages 16 through
18. Also contact a qualified service
person or gas supplier for repairs.
Until repairs are made, light pilot
with match. To light pilot with match,
see Manual Lighting Procedure.
7. Keep control knob pressed in for 30
seconds after lighting pilot. After 30
seconds, release control knob.
• If control knob does not pop up
when released, contact a qualified
service person or gas supplier for
repairs.
Note: If pilot goes out, repeat steps
3 through 7. This heater has a safety
interlock system. Wait one (1) minute
before lighting pilot again.
8. Turn control knob counterclockwise
C-clockwise
to desired heating level. The
main burner should light. Set control
knob to any heat level between HI
and LO.
Thermocouple
Pilot Burner
Figure 24 - Pilot
Ignitor Electrode
OPERATING
HEATER
Continued
CAUTION: Do not try to adjust
heating levels by using the
manual shutoff valve.
PILOT
LO
OFF HI
IGNITOR
LIGHTING
INSTRUCTIONS
1. STOP! Read the safety information
on page 13, column 3.
2. Make sure manual shutoff valve is
fully open.
3. Turn control knob clockwise
Clockwise
to the OFF position.
Ignitor Button Control Knob
Figure 23 - Control Knob In The OFF
Position
THERMOSTAT
CONTROL
OPERATION
The thermostatic control used on this
heater differs from standard thermostats.
Standard thermostats simply turn on and
off the burner. The thermostat used on
this heater senses the room temperature.
The thermostat adjusts the amount of gas
flow to the burner. This increases or de-
creases the burner flame height. At times
the room may exceed the set tempera-
ture. If so, the burner will shut off. The
burner will cycle back on when room
temperature drops below the set tem-
perature.
The control knob can be set to any heat
level between HI and LO.
Note: The thermostat sensing bulb mea-
sures the temperature of air near the
heater cabinet. This may not always agree
with room temperature (depending on
housing construction, installation loca-
tion, room size, open air temperatures,
etc.). Frequent use of your heater will let
you determine your own comfort levels.