Desa FMH26TP User Manual download pdf (Page 18)

18

107106

PROPANE/LP VENT-FREE FIREPLACE SYSTEM

INSPECTING

BURNER

Thermocouple

Pilot Burner

Figure 32 - Correct Pilot Flame Pattern

Thermocouple

Pilot Burner

Figure 33 - Incorrect Pilot Flame Pattern

Check pilot flame pattern and burner flame

pattern often.

PILOT FLAME PATTERN

Figure 32 shows a correct pilot flame pattern.

Figure 33 shows an incorrect pilot flame

pattern. The incorrect pilot flame is not prop-

erly heating the thermocouple. This will cause

the thermocouple to cool. When the thermo-

couple cools, the fireplace will shut down.

If pilot flame pattern is incorrect, as shown

in Figure 33

• turn fireplace off (see To Turn Off Gas to

Appliance)

• see Troubleshooting, pages 20 through 22

TO TURN OFF GAS

TO APPLIANCE

The thermostatic control used on this fire-

place differs from standard thermostats.

Standard thermostats simply turn on and

off the burner. The thermostat used on

this fireplace senses the room tempera-

ture. The thermostat adjusts the amount

of gas flow to the burner. This increases or

decreases the burner flame height. At times

the room may exceed the set temperature.

If so, the burner will shut off. 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 HI and LO.

Note:

The thermostat sensing bulb mea-

sures the temperature of air near the fire-

place cabinet. This may not always agree

with room temperature (depending on

housing construction, installation location,

room size, open air temperatures, etc.).

Frequent use of your fireplace will let you

determine your own comfort levels.

Shutting Off Fireplace

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.

THERMOSTAT

CONTROL OPERATION

1. Follow steps 1 through 5 under Light-

ing Instructions, page 17.

2. With control knob pressed in, strike

match. Hold match to pilot until pi-

lot lights.

3. Keep control knob pressed in for 30

seconds after lighting pilot. After 30

seconds, release control knob. Now

follow step 8, page 17.

MANUAL LIGHTING

PROCEDURE

OPERATING

FIREPLACE

Continued

OPERATING BLOWER

O

F

F

O

N

Auto/Off/On Switch

This blower has three settings: ON, OFF,

and AUTO. In the ON position, the blower

will operate constantly. In the OFF posi-

tion, the blower will not operate. In the

AUTO position, the blower will start when

the thermostat senses a sufficient increase

in firebox temperature.

Note:

Your fireplace and thermostat

blower will not turn on and off at the

same time. The fireplace may run for

several minutes before the blower turns

on. After the heater modulates to the pilot

position, the blower will continue to run.

The blower will shut off after the firebox

temperature decreases.

Note:

It is safe to operate fireplace with

blower turned off. However, the blower

helps distribute heated air from the

fireplace.

Figure 31 - Auto/Off/On Switch

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