035-19656-003 Rev. A (1004)
Unitary Products Group
9
HIGH ALTITUDE GAS ORIFICE CONVERSION
This furnace is constructed at the factory for natural gas-fired operation
at 0 – 2,000 ft. (0 m – 610 m) above sea level.
The gas orifices on this furnace must be changed in order to maintain
proper and safe operation, when the furnace is installed in a location
where the altitude is greater than 2,000 ft. (610 m) above sea level on
natural gas or the altitude is greater than 4,000 ft. (1219 m) above sea
level on propane (LP) gas. Refer to Table 7 or the instructions in the
high altitude conversion kit for the proper gas orifice size.
The unit may also be converted for altitudes up to 10,000 ft. (3048 m)
on natural and propane (LP) gas with additional derate as shown in
Table 7 or refer to ANSI Z223.1 NFPA 54 National Fuel Gas Code or in
Canada CAN/CGA-B149.1-00 Natural Gas and Propane Installation
Code.
HIGH ALTITUDE PRESSURE SWITCH CONVERSION
For installation in locations where the altitude is less than 4,500 feet
(1372 m), it is not required that the pressure switch be changed. For
altitudes above 4,500 feet (137 m), refer to Instructions in the Acces-
sory High Altitude Kit.
SECTION V: ELECTRICAL POWER
Electrical Power Connections
Field wiring to the unit must be grounded. Electric wires that are field
installed shall conform to the temperature limitation for 63°F (35°C) rise
wire when installed in accordance with instructions. Refer to Table 8 in
these instructions for specific furnace electrical data.
Annual Fuel Utilization Efficiency (AFUE) numbers are determined in accordance with DOE Test procedures.
Wire size and over current protection must comply with the National Electrical Code (NFPA-70-latest edition) and all local codes.
The furnace shall be installed so that the electrical components are protected from water.
PROPANE AND HIGH ALTITUDE CONVERSION KITS
It is very important to choose the correct kit and/or gas orifices for the altitude and the type of gas for which the furnace is being installed.
Only use natural gas in furnaces designed for natural gas. Only use propane (LP) gas for furnaces that have been properly converted to use pro-
pane (LP) gas. Do not use this furnace with butane gas.
Incorrect gas orifices or a furnace that has been improperly converted will create an extremely dangerous condition resulting in premature heat
exchanger failure, excessive sooting, high levels of carbon monoxide, personal injury, property damage, a fire hazard and/or death.
High altitude and propane (LP) conversions are required in order for the appliance to satisfactory meet the application.
An authorized distributor or dealer must make all gas conversions.
In Canada, a certified conversion station or other qualified agency, using factory specified and/or approved parts, must perform the conversion.
The installer must take every precaution to insure that the furnace has been converted to the proper gas orifice size when the furnace is installed.
Do not attempt to drill out any orifices to obtain the proper orifice size. Drilling out a gas orifice will cause misalignment of the burner flames,
causing premature heat exchanger burnout, high levels of carbon monoxide, excessive sooting, a fire hazard, personal injury, property damage
and/or death.
TABLE 7:
High Altitude Conversion
Type
Of Gas
Orifice at
Sea Level
2,000 ft.
(610 m)
3,000 ft.
(914 m)
4,000 ft.
(1219 m)
5,000 ft.
(1524 m)
6,000 ft.
(1829 m)
7,000 ft.
(2134 m)
8,000 ft.
(2438 m)
9,000 ft.
(2743 m)
10,000 ft.
(3048 m)
Natural
#45
#46
#47
#47
#47
#48
#48
#49
#49
#50
Propane
#55
#55
#55
#55
#56
#56
#56
#56
#56
#57
Use copper conductors only.
TABLE 8:
Ratings & Physical / Electrical Data - Upflow Models
Input
Output
Nominal
Cabinet Width
Air Temp. Rise
MBH kW MBH kW CFM cmm In.
cm
AFUE
°F
°C
40 11.7 32
9.4 1200 34.0
14-1/2 36.8
80.0
25-55
13-31
60 17.6 48 14.1 1200 34.0
14-1/2 36.8
80.0
25-55
13-31
80 23.5 64 18.8 1200 34.0
14-1/2 36.8
80.0
35-65
19-36
80 23.5 64 18.8 1600 45.3
17
1/2 44.5
80.0
25-55
13-31
80 23.0 64 18.8 2200 62.3 21
53.3
80.0
25-55
13-31
100 29.3 80
23.4 1200 34.0 17
1/2 44.5
80.0
40-70
22-39
100 29.3 80
23.4 1600 45.3 17
1/2 44.5
80.0
35-65
19-36
100 29.3 80
23.4 2000 56.6 21
53.3
80.0
25-55
13-31
115 33.7 92
26.9 1600 45.3 21
53.3
80.0
35-65
19-36
115 33.7 92
26.9 2000 56.6 21
53.3
80.0
30-60
17-33
130 38.1 104 30.5 2000 56.6 24-1/2 62.2
80.0
35-65
19-36
Input
Max. Outlet
Air Temp
Blower
Blower
Size
Total
Unit
Max Over-current
Size (awg) @ 75 ft.
Min.
Wire
Operation
WGT.
Operation
WGT.
MBH kW
°F
°C
Hp Amps In.
cm
amps
protect
one
way LBS
Kg
40
11.7
155
68.3
1/2
7.1
10 x 8
25.4 x 17.7
9.0
20
14
107
48.5
60
17.6
155
68.3
1/2
7.1
10 x 8
25.4 x 17.7
9.0
20
14
112
50.8
80
23.5
170
76.7
1/2
7.1
10 x 8
25.4 x 17.7
9.0
20
14
119
54.0
80
23.5
155
68.3
3/4
11.5
11 x 8
27.9 x 20.3
12.0
20
14
129
58.5
80
23.0
165
73.9
1.0
14
11 x 11 27.9 x 25.4
14.0
20
12
144
65.3
100
29.3
170
76.7
1/2
7.1
10 x 8
25.4 x 20.3
12.0
20
14
131
59.4
100
29.3
165
73.9
3/4
11.5
11 x 8
25.4 x 25.4
12.0
20
14
137
62.1
100
29.3
155
68.3
1.0
14
11 x 11 27.9 x 25.4
14.0
20
12
149
67.6
115
33.7
170
76.7
3/4
11.5
10 x 10 25.4 x 25.4
12.0
20
14
149
67.6
115
33.7
170
76.7
1.0
14
11 x 11 27.9 x 25.4
14.0
20
12
151
68.5
130
38.1
165
73.9
1.0
14
11 x 11 27.9 x 25.4
14.0
20
12
163
73.9
