IM 861
13
IMPORTANT NOTE FOR ALTITUDES ABOVE 2,000 FEET (610
METERS):
The main burner orifices in your furnace and in these
kits are sized for the nameplate input and intended for
installations at elevations up to 2,000 feet in the USA or Canada,
or for elevations of 2,000 - 4,500 feet (610 -1,373 meters) in
Canada if the unit has been derated at the factory. For elevations
above 2,000 feet (610 meters)
IN THE USA ONLY
(see ANSI-
Z223.1), the burner orifices must be sized to reduce the input 4%
for each 1,000 feet (305 meters) above sea level.
NOTICE:
Derating of the heating input for high altitude in the
field is unlawful in canada (refer to can/cga 2.17). Units installed
in altitudes greater than 2,000 feet (610 meters) must be shipped
from the factory or from a factory authorized conversion station
with the heating input derated by 10% so as to operate properly
in altitudes from 2,000 - 4,500 feet (610 - 1,373 meters).
Condensate Drain
The condensate drain connection of the evaporator is threaded
3/4
ⴖ
nominal P.V.C. pipe.
IMPORTANT:
Install a condensate
trap to ensure proper condensate drainage. See Figure 15.
Wiring
Power Supply
1
All wiring should be made in accordance with the
National Electrical Code.
Consult the local power
company to determine the availability of sufficient power
to operate the unit. Check the voltage at power supply to
make sure it corresponds to the unit’s RATED
VOLTAGE REQUIREMENT. Install a branch circuit
disconnect near the rooftop, in accordance with the
N.E.C., C.E.C. or local codes. A bracket is provided with
the unit for mounting of the disconnect. See Figure 16.
2
It is important that proper electrical power is available at
the unit. Voltage should not vary more than 10% from
that stamped on the unit nameplate. On three phase units,
phases must be balanced within 3%.
3
For branch circuit wiring (main power supply to unit
disconnect), the minimum wire size for the length of run
can be determined from Table 5 using the circuit
Figure 13: LP Conversion Kit
Figure 14
MANIFOLD PIPE
ONE
1
21
1
30
1
34
1
39
3
45
40,000
TEN
13
30
15
0
15
36
16
30
37
30
ONE
0
54
1
0
1
3
1
6
2
30
60,000
TEN
9
0
10
0
10
24
11
0
25
0
ONE
0
41
0
45
0
47
0
50
1
53
80,000
TEN
6
45
7
30
7
48
8
15
18
45
ONE
0
33
0
36
0
38
0
40
1
30
100,000
TEN
5
24
6
0
6
15
6
36
15
0
METER TIME IN MINUTES AND SECONDS FOR NORMAL
INPUT RATING OF FURNACES EQUIPPED FOR NATURAL
OR LP GAS
INPUT
BTU/HR
METER
SIZE
CU. FT.
HEATING VALUE OF GAS BTU PER CU. FT.
900
1000
1040
1100
2500
MIN. SEC. MIN. SEC. MIN. SEC. MIN. SEC. MIN. SEC.
Table 4
Figure 15: Condensate Drain
DO NOT OVERTIGHTEN DRAIN FITTING
Turn off the main electrical power at the branch circuit
disconnect closest to the unit before attempting any wiring.
Failure to do so can cause electrical shock resulting in
personal injury or death.
▲
▲
DANGER
!
