11
Installation Instructions and Owner’s Manual
Unvented LP-Gas Vent Free Heaters
9. To select the desired heat level, turn the
temperature setting knob counterclockwise to
between 1 & 5.
THERMOSTAT CONTROL OPERATION
FOR MHVFG30LP:
The thermostatic control used mod-
ulates 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 to the OFF posi-
tion.
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 to the PILOT/IGN
position.
INSPECTING BURNER
Check pilot fl ame pattern and burner fl ame pattern
often.
PILOT FLAME PATTERN
Figure 21 shows a correct pilot fl ame pattern. Figure
22 shows 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 thermo-
couple cools, the heater will shut down. If pilot fl ame
pattern is incorrect, as shown in Figure 22:
•
Turn heater off (see
To Turn OFF Gas to Appli-
ance
, above.
•
See Troubleshooting, pages 14-15.
CLEANING AND MAINTENANCE
WARNING:
Turn off heater and let cool before
servicing.
CAUTION:
You must keep control areas, burner
and circulation air passageways of heater clean.
Inspect these areas of heater before use. Have
the heater inspected yearly by a qualifi ed service
person. Heater may need more frequent cleaning
due to excess lent from carpeting, bedding material,
pet hair, etc.
Make sure grille guard is in place before running
heater. If screen or grille guard is removed for
servicing it must be replaced prior to operating the
heater.
push in or turn by hand, don’t try to repair it call
a qualifi ed service technician or gas supplier.
Force or attempted repair may result in a fi re or
explosion.
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 re-
place 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. 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 19).
4. Wait
fi ve (5) minutes. Then smell for gas includ-
ing near the fl oor. If you smell gas, STOP! Fol-
low “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) sec-
onds.
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
Figure 19.
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 sup-
plier for repairs.
8.
When the pilot is lit, turn control knob coun-
terclockwise to heating level. The main burner
should light.
Ignitor Button
Control Knob