PILOT ADJUSTMENT
The pilot flame can be observed by opening the pilot lighting hole cover. The pilot flame should surround the top 3/8 to ½ inch of the thermocouple (see Figure 2). If the flame needs adjusting, first locate the pilot adjustment screw cap and remove. Adjustment screw is underneath (see Figure 1). To increase the
flame, turn the pilot adjustment screw counterclockwise 
.
To decrease the flame, turn the screw clockwise 
. NOTE: The pilot is unregulated. If incoming line pressure is more than 7” w.c. Natural Gas or 11” w.c. for L.P. Gas, the pilot flame size should be decreased.
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| Pilot Adj. Screw | |
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FIGURE 1 |
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PILOT FLAME | 3/8 TO | ||
ADJUST- | |||
1/2 INCH | |||
MENT |
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Pilot flame |
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should |
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envelop |
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3/8 to 1/2 |
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inch on the |
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tip of the |
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generator. |
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FIGURE 2 |
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RADIANTS AND GLASS PANELS
FOR ALL VCR MODELS
(See Figure 9 – Replacement Parts Section)
INSTALL GLASS AND RADIANTS AS FOLLOWS:
STEP 1. Remove three screws from under top of opening in bezel frame assembly.
STEP 2. Pull top of bezel down and lay aside.
STEP 3. Remove glass from bottom pad in shipping carton. STEP 4. Remove carton containing radiants from cavity of combustion chamber.
STEP 5. Remove radiants from carton and install by tilting backwards and lifting at the same time into opening. Place the radiants on the burner radiants supports. The radiants must be straight. Never operate heater if any radiant is tilted to front or rear.
Continued
MAIN BURNER ORIFICE
This appliance was shipped from the factory with an orifice sized to give the correct gas input using the gas for which the heater was equipped. There may be local conditions, such as variation in gas pressure or BTU content of the gas, which may be cause for a change in the orifice. The gas company supplying the fuel or the installing contractor should check the gas input rate.
If the rate exceeds the “BTUH INPUT” on the rating plate by 5%, the orifice should be replaced with a smaller orifice by a qualified technician to reduce the input to the rating plate value.
The input rate may need to be adjusted for elevation. See the following charts to determine the correct orifice size for your Model Number and elevation. These orifice sizes are based on a heating value of 1020 for Natural Gas and 2500 for L.P. Gas.
CAUTION: As elevation increases, derating is necessary for the safe and proper operation of this heater. Do not increase the Btu input rate by increasing the orifice size or gas pressure. Allow for elevation derating when sizing gas heating equipment.
NATURAL GAS
SPECIFIC ELEVATIONS
Model 0 to 2,000- 4,000 - 6,000 - 8,000’ No. 2,000’ 4,000’ 6,000’ 8,000’ 10,000’
VC201 45 47 48 4950
VC351 35 37 38 4042
VC501 30 31 31 3235
VC701 25 27 28 2930
VCR351 35 37 38 4042
VCR501 30 31 31 3235
VCR701 25 27 28 2930
ORDER KIT #49820
L.P. GAS
SPECIFIC ELEVATIONS
Model 0 to 2,000- 4,000 - 6,000 - 8,000’
No. 2,000’ 4,000’ 6,000’ 8,000’ 10,000’
VC202 1.3mm 55 56 56 57
VC352 1.65mm 53 53 54 54
VC502 47 49 49 50 51
VC702 41 42 43 44 46
VCR352 1.65mm 53 53 54 54
VCR502 47 49 49 50 51
VCR702 41 42 43 44 46
ORDER KIT #49820
STEP 6. Install glass panels by inserting top edge into upper retainer and lower into bottom support, and slide glass into position. Do not allow a crack between the two glass panels. Never operate heater with either glass missing or cracked.
STEP 7.
Page 8