Mr. Heater MHVFB20TB LP Operations Instructions download pdf (Page 11)

Installation Instructions and Owner’s Manual

Unvented LP-Gas Vent Free Room Heaters

9. To select the desired heat level, turn the

temperature setting knob counterclockwise to

between 1 & 5.

THERMOSTAT CONTROL OPERATION

FOR IR20LPT / IR30LPT: The thermostatic control

used simply turns on and off the burner.

FOR BF20LPT / BF30LPT: The thermostatic control

used modulates the 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 ame pattern and burner ame pattern

often.

PILOT FLAME PATTERN

Figure 21 shows a correct pilot ame pattern. Figure

22 shows an incorrect pilot ame pattern. The incorrect

pilot 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 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 quali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 qualied service technician or gas supplier.

Force or attempted repair may result in a re or

explosion.

D. Do not use this appliance if any part has been

underwater. Immediately call a quali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 gure 19).

4. Wait ve (5) minutes. Then smell for gas includ-

ing near the 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 ve (5) sec-

onds.

Note: The 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 qualied

service person of gas supplier for repairs.

• If control knob does not pop up when released,

contact a quali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

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Mr. Heater MHVFB20TB LP Operations Instructions Page 11

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