Vanguard Heating WMH26TNB installation manual Inspecting Burner, Operating Fireplace, Continued

Models: WMH26TNB

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Shutting Off Fireplace

18

OPERATING FIREPLACE

To Turn Off Gas To Appliance

 

Thermostat Control Operation

 

Manual Lighting Procedure

 

Operating Blower

 

INSPECTING BURNER

 

Pilot Flame Pattern

 

OPERATING FIREPLACE

Continued

TO TURN OFF GAS

TO APPLIANCE

Shutting Off Fireplace

1. Turn control knob clockwise ClockwiseShutting Off Burner Only (pilot stays lit) to the OFF position.

2.Turn off all electric power to the appliance if service is to be performed.

Shutting Off Burner Only (pilot stays lit)

Turn control knob clockwise ClockwiseINSPECTING BURNER to the PILOT position.

THERMOSTAT

CONTROL OPERATION

The thermostatic control used on this fireplace differs from standard thermostats. Standard thermostats simply turn on and off the burner. The thermostat used on this fireplace senses the room temperature. 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 measures the temperature of air near the fireplace cabinet. This may not always agree with room temperature (depending on housing construction, instal- lation location, room size, open air temperatures, etc.). Fre- quent use of your fireplace will let you determine your own comfort levels.

MANUAL LIGHTING

PROCEDURE

1.Follow steps 1 through 5 under Lighting Instructions, page 17.

2.With control knob pressed in, strike match. Hold match to pilot until pilot 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.

OPERATING

BLOWER

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 in- crease 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.

ON

OFF

Auto/Off/On

Switch

Figure 32 - Auto/Off/On Switch

INSPECTING BURNER

Check pilot flame pattern and burner flame pattern often.

PILOT FLAME PATTERN

Figure 33 shows a correct pilot flame pattern. Figure 34 shows an incorrect pilot flame pattern. The incorrect pilot flame is not properly heating the thermocouple. This will cause the thermocouple to cool. When the thermocouple cools, the fireplace will shut down.

If pilot flame pattern is incorrect, as shown in Figure 34

turn fireplace off (see To Turn Off Gas to Appliance)

see Troubleshooting, pages 20 through 22

Note: The pilot flame on natural gas units will have a slight curve, but flame should be blue and have no yellow or orange color.

Pilot Burner

Thermocouple

Pilot Burner

 

 

Thermocouple

Figure 33 - Correct Pilot

Figure 34 - Incorrect Pilot

Flame Pattern (Propane/LP

Flame Pattern (Propane/LP

Shown)

Shown)

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111043-01A

Page 18
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Vanguard Heating WMH26TNB installation manual Inspecting Burner, Operating Fireplace, Continued, Shutting Off Fireplace