Specifications

TM036 Vermont Gas Fireplace & Gas Log Fire Service Instructions REV: A
D.O.I: 17/01/2008
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6. Antenna: The antenna receives transmissions from the remote control. The antenna
should hang in free air away from grounded (earthed) metal.
7. Gas type plug: There are two gas type plugs available, one for NG and one for
Propane. This plug determines the gas type the gas valve operates on (refer to „Gas
Type Conversion Procedure‟ on page 51 for more information).
8. Pilot adjustment screw: This screw is utilised to adjust the pilot flame height by
altering the gas pressure to the pilot. Remove the outer screw cap and turn the internal
screw clockwise to decrease the pilot flame and anti-clockwise to increase the pilot
flame. It should be noted that the pilot gas pressure is the only gas pressure that can be
adjusted at the log fire.
9. Inlet gas test point: The inlet gas pressure can be measured at this point using a
manometer. The test point screw is captive and cannot be removed. To connect a
manometer, unscrew the test point screw several turns in an anti-clockwise direction
and attach a ¼” ID manometer hose with the screw in place. Note: The inlet gas
pressure cannot be adjusted at the log fire.
10. Burner gas test point: The burner gas pressure can be measured at this point using
a manometer. This test point screw is also captive and should be connected to with a
manometer as per the inlet gas test point. (This test point is located behind the
modulating motor and cannot be seen in the diagram on page 8). Note: The burner gas
pressure is fixed and cannot be adjusted.
Operation
The LHEC30 and RFSDV34 utilise the same gas valve, pilot assembly, fan assembly,
igniter, transformer and remote control to provide radiant/convection heating. Although
aesthetically the log fires are quite different, operation is identical.
Sequence of Operation
Refer to „Sequence of Operation Component Diagram‟ on page 10 to view components
shown in brackets e.g. (1).
1. The incoming 240VAV power supply is converted by the transformer (1) to 115VAC.
2. The gas valve (2) LOCAL/REMOTE selector switch (3) is manually set on „LOCAL‟ and
the pilotstat knob (4) is manually turned to the „PILOT‟ position and depressed; allowing
gas entry via an internal pilot valve to the pilot (5).
3. Ignition is provided by a spark which is generated at the ignition (spark) plug (6) by
manually pressing the piezo igniter (7).
4. The gas passing through the pilot (5) is ignited by the ignition spark and the resulting
flame impinges on thermopile 1 (8) and thermopile 2 (9) which both generate a voltage
after a period of several seconds (hot start) to one minute (cold start).
5. If the blocked flue switch (10) is closed, the resulting voltage generated by thermopile 1
(8) and thermopile 2 (9) will create an electromagnetic field in the gas valves (2) internal
pilot valve solenoid which holds the internal pilot valve open after the pilotstat knob (4)
is released.