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Idiomas disponibles
CAU T I O N : THERE MAY BE MOMENTARY AND SPASMODIC ORANGE FLASHES IN THE FLAME.
This is caused by the burning of air borne dust particles and is not to be confused with the yellow tipping
which is a stable or permanent situation when there is insufficient primary air.
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 supply 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 must be replaced with a smaller orifice by a
qualified service technician to reduce the input to the rating
plate value.
The input rate will need to be adjusted for elevation above
2,000 Feet. See the Specific Elevations chart (to the right)
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.
Fig. I: Proper Burner Flame
Inner Mantle 1/4"
MAIN BURNER ORIFICE
3" to 5"
1/4"
Outer Mantle 3 - 5"
Specific Elevations
Model
0 to
No.
2,000'
NATURAL GAS
VC201
45
VC351
35
VC501
30
L.P. GAS
VC202
1.3mm
VC352
1.65mm
VC502
47
ORDER KIT #49820 45-1 High Altitude Kit
Page 9
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2,000' -
4,000' -
6,000' -
4,000'
6,000'
8,000'
47
48
49
37
38
40
31
31
32
55
56
56
53
53
54
49
49
50
8,000' -
10,000'
50
42
35
57
54
51
1017480-A
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