PILOT ADJUSTMENT MAIN BURNER ORIFICE
The pilot flame can be obsel_Ted by opening the pilot lighting
hole cover. The pilot flame should surround the top 3/8 to V_,
inch of the thennocouple (see Fimlre 2). If the flame needs
adjusting, first locate the pilot adjustment screw cap and relnove.
Adjustment screw is underneath (see Fire,re 1). To increase the
flame, turn the pilot adjustment screw counterclockwise I_'-N.
To decrease the flame, mm the screw cloc_vise i"'A. NOTE:
The pilot is unremllated. If incoming line pressure is more than
7" w.c. Natural Gas or 11" w.c. for L.R Gas, the pilot flame size
should be decreased.
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.
FIGURE 1
_I " Pilot Adj.
Screw
o÷N ?
PILOT FLAME
ADJUST-
MENT
Pilot tlmne
should
envelop
3/8 to 1/2
inch on the
tip of the
enerator.
t3/8 TO
1/2INCH
FIGURE 2
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 liom under top of opening in
bezel t_rameassembly.
STEP2. Pull top ofbezeI down and lay aside.
STEP 3. Remove glass liom bottom pad in shipping carton.
STEP 4. Remove carton containing radiants liom cavity of
combustion chamber.
STEP 5. Remove radiants from carton and install by tilting
backwards and lilting 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 liont or rear. Continued
The input rate may need to be adjusted for elevation. See the
following charts to determine the correct orifice size t\3ryour
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 sate 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 0to 2,000- 4,000- 6,000- 8,000'
No. 2,000' 4,000' 6,000' 8,000' 10,000'
VC201 45 47 48 49 50
VC351 35 37 38 40 42
VC501 30 31 31 32 35
VC701 25 27 28 29 30
VCR351 35 37 38 40 42
VCR501 30 31 31 32 35
VCR701 25 27 28 29 30
ORDER KIT #49820 45-1 HIGH ALTITUDE KIT
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 1.31rnn 55 56 56 57
VC352 1.651rnn 53 53 54 54
VC502 47 49 49 50 51
VC702 41 42 43 44 46
VCR352 1.651rnn 53 53 54 54
VCR502 47 49 49 50 51
VCR702 41 42 43 44 46
ORDER KIT #49820 45-1 HIGH ALTITUDE KIT
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. Re-install bezel by placing bezel tabs over lower liont
and swing bezel into position and secure with three screws.
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