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Furnace High Fire Rating
Plate Input (Btu/h)
60,000
80,000
100,000
120,000
Table 8. Natural and LP Gas Orifice Sizes
for Elevations between
zero and 4999 ft. Above Sea Level
LP/Propane Gas Sea Level and
High Altitude Conversion
Conversion to LP/propane gas can be
accomplished by first replacing the natural gas
orifices with the appropriate LP/propane orifices
shown in Table 8 or 9 Note: for installations
between zero and 5000 ft. above sea level, refer
to Table 8. For installations above 5000 ft. above
sea level, refer to Table 9. After changing the
orifices, use Tables 7 and 9 to determine the
appropriate manifold pressure for your
installation.
Conversion to LP/propane, sea level, and high
altitude is detailed in the installation instructions
provided with the conversion kit. Approved
conversion kits are listed below.
United States LP/Propane Gas Sea Level and
High Altitude Conversion Kit - P/N 904404
This kit is for LP/propane conversion in the United
States at altitudes between zero and 10,000 ft.
above sea level. Follow the installation instructions
supplied with the kit for proper installation.
Canadian LP/Propane Gas Sea Level and High
Altitude Conversion Kit - P/N 904405
This kit is for LP/propane conversions in Canada
at altitudes between zero and 4500 ft. above sea
level. Follow the installation instructions supplied
with the kit for proper installation.
!
CAUTION:
To avoid electric shock, personal in-
jury, or death, turn off the power at the
disconnect or the main service panel
before making any electrical connec-
tions.
Orifice Drill Size
Nat.
LP
49
56
45
55
45
55
45
55
Table 9. Natural and LP gas Orifice Sizes
for Elevations between 5000 and 10,000 ft.
ELECTRICAL WIRING
Electrical connections must be made in accor-
dance with all applicable local codes and ordi-
nances, and with the current revision of the
National Electric Code (ANSI/NFPA 70).
For Canadian installations electrical connec-
tions and grounding must be done in accor-
dance with the current Canadian Electrical Code
(CSA C22.1 Part 1) and/or local codes. If any
of the original wire as supplied with the furnace
must be replaced, it must be replaced with wire
having a minimum temperature rating of 105°C.
Refer to the furnace nameplate and Table 10 for
electrical requirements.
Line Voltage Wiring
The line voltage (115 volt) to the furnace must
be supplied from a dedicated branch circuit
containing the correct fuse or circuit breaker for
the furnace. See Table 10. An electrical switch
should be readily accessible from and within
sight of the furnace. (See the Wiring Diagram
label in the furnace and Figure 21.)
The furnace cabinet must have an uninter-
rupted, unbroken ground to minimize injury
should an electrical fault condition occur. The
controls used in this furnace require an earth
ground to operate properly. Acceptable meth-
ods for grounding are electrical wire or conduit
approved for electrical ground service. Do not
use gas piping as an electrical ground.
NOTE: Proper line voltage polarity must be
maintained in order for the control system
to operate correctly. Verify that the incom-
ing neutral line is connected to the white
wire and the incoming "hot" line is con-
nected to the black wire in the junction box.
These furnaces will not operate unless po-
larity and ground are properly connected.
See Figure 21.
Furnace High Fire Rating
Plate Input (Btu/h)
60,000
80,000
100,000
120,000
Above Sea Level
Orifice Drill Size
Nat.
LP
49
57
45
56
45
56
46
56
25
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