Purging Gas Lines
!
WARNING
NEVER PURGE A GAS LINE INTO THE COMBUS-
TION CHAMBER.
NEVER USE A MATCH, TAPER, CIGARETTE LIGHT-
ER, FLAME OR ANY OTHER IGNITION SOURCE TO
CHECK FOR LEAKS IN A GAS LINE.
FAILURE TO ADHERE TO THIS WARNING CAN
CAUSE A FIRE OR EXPLOSION RESULTING IN PROP-
ERTY DAMAGE, PERSONAL INJURY, OR LOSS OF
LIFE.
18 - CONVERSIONS
17 - GAS SUPPLY AND PIPING
HIGH ALTITUDE: In Canada, the furnace may be converted for
high altitude (2000-4500 feet) by changing the burner orifi ces. Th
e
Conversion Kit part number 550001641 contains both natural gas
and LP gas orifi ces. (
Table 9
)
In the United States, the modifi cations for high altitude are based on
a 2% reduction of input capacity for every 1000 feet above 2000 feet
above sea level.
Table 8
illustrates the impact of altitude for selected
elevations. Consult with local fuel suppliers or authorities to deter-
mine local regulations or customs.
NATURAL TO LP GAS: Th
is series furnace is manufactured as a
natural gas (sea level) appliance that may be converted to LP gas
through use of the Conversion Kit part number 550001648. Th
is
kit contains the orifi ces needed for all models, the regulator springs
for the gas valve, and a label to affi x adjacent to the appliance rating
plate to alert subsequent service technicians of the conversion.
LP TO NATURAL GAS: Although the furnace is manufactured
initially as a natural gas appliance, if, aft er an LP gas conversion it
becomes necessary to convert back to natural gas and the original
parts are unavailable, Th
e Conversion Kit part number 550001816
may be obtained.
TABLE 8 - HIGH ALTITUDE SPECIFICATIONS
(U.S.A.)
MODEL ALTITUDE
(FT)
ORIFICE SIZE (DMS)
NATURAL
LP GAS
All
0-2000
45
55
2000-3000
48
56
3000-4000
49
57
4000-5000
50
58
5000-6000
51
60
6000-7000
52
61
7000-8000
53
62
8000-9000
54
63
9000-10000
55
65
† Gas input ratings are certifi ed for elevations to 2000 ft . For elevations above
2000 ft , reduce ratings 2% for each 1000 ft above sea level.
In Canada, derate the unit 5% for elevations from 2000 to 4000 ft above sea
level.
TABLE 9- HIGH ALTITUDE SPECIFICATIONS (CANADA)
MOD-
EL
ALTITUDE
(FT)
INPUT
BTU/HR
OUTPUT
BTU/HR
ORIFICE SIZE (DMS)
QTY.
NATURAL LP GAS
60
0 - 2000
60000
57000
45
55
3
2000 - 4500
54000
51300
46
56
80
0 - 2000
80000
76000
45
55
4
2000 - 4500
72000
68400
46
56
100
0 - 2000
100000
95000
45
55
5
2000 - 4500
90000
85500
46
56
120
0 - 2000
120000
114000
45
55
6
2000 - 4500
108000
102600
46
56
† Gas input ratings are certifi ed for elevations to 2000 ft . For elevations
above 2000 ft , reduce ratings 2% for each 1000 ft above sea level.
In Canada, derate the unit 5% for elevations from 2000 to 4000 ft
above sea level.
Figure 29 - Inshot Burner Assembly
36
