Mr. Heater MHVFRD20NGBT Operating Instructions And Owner's Manual page 11

D. Do not use this appliance if any part has been
underwater. Immediately call a qualifi ed service
technician to inspect the appliance and to
replace any part of the control system which
has been underwater.
LIGHTING INSTRUCTIONS
1. STOP! Read the all safety information included
with and on the side of heater.
2. Turn off all electric power to the appliance and
make sure the equipment shutoff valve is fully open.
3. Push in gas control knob and slightly turn clock-
wise to the OFF position (see fi gure 16).
4. Wait fi ve (5) minutes to clear out any gas.
Then smell for gas including near the fl oor. If
you smell gas, STOP! Follow "B" in the safety
information above. If you do not smell gas, go
to the next step.
5. Push in and turn control knob counterclockwise
to PILOT. Press in control knob for fi ve
(5) seconds.
Note: The fi rst time that the heater is operated after
connecting the gas supply, the control knob should
be depressed for about 30 seconds. This will allow
air to bleed from the gas system. This may take
longer in some installations
Ignitor Button
Control Knob
Figure 16.
6. With control knob pressed in, push down and
release the ignition button. This will light pilot. If
needed keep pressing igniter button until pilot
lights.
7. Keep control knob pressed in for (30) seconds
after lighting pilot. After 30 seconds, release
control knob.
•
If pilot does not stay lit, refer to Troubleshoot-
ing, pages 14 & 15. Also, contact a qualifi ed
service person of gas supplier for repairs.
•
If control knob does not pop up when released,
contact a qualifi ed service person or gas
supplier for repairs.
8. When the pilot is lit, turn control knob
counterclockwise
main burner should light.
9. To select the desired heat level, turn the
temperature setting knob counterclockwise
to between 1 & 5.
Unvented Natural Gas Vent Free Room Heaters
to heating level. The
11
THERMOSTAT CONTROL OPERATION
FOR IR20NGT / IR30NGT: The thermostatic control
used simply turns on and off the burner.
FOR BF20NGT / BF30NGT: The thermostatic control
used modulates the fl ame size as the temperature gets
closer to set point, then it turns off the burner upon
reaching temperature.
The burner will cycle back on when room temperature
drops below the set temperature. The control knob can
be set to any heat level between 1 and 5. Selecting the
HI setting will cause the burner to remain on.
TO TURN OFF GAS TO APPLIANCE
SHUTTING OFF HEATER
1. Turn control knob clockwise
position.
2. Turn off all electrical power to the appliance if
servicing is to be preformed.
3. Turn off equipment shutoff valve.
SHUTTING OFF BURNER ONLY (PILOT STAYS LIT)
1. Turn control knob clockwise
PILOT/IGN position.
INSPECTING BURNER
Check pilot fl ame pattern and burner fl ame pattern
often.
PILOT FLAME PATTERN
Figure 17 shows a correct pilot fl ame pattern and an
incorrect pilot fl ame pattern. The incorrect pilot fl ame
pattern is not touching thermocouple. This will cause
the thermocouple to cool. When the thermocouple
cools, the heater will shut down. If pilot fl ame pattern is
incorrect, as shown in Figure 17:
•
Turn heater off (see To Turn OFF Gas to
Appliance, above.
•
See Troubleshooting, pages 14-15.
Correct pilot position.
Figure 17
Installation Instructions and Owner's Manual
to the OFF
to the
Incorrect pilot position.