035-14446-000 Rev. B (1002)
Unitary Products Group
3
5.
Install the high altitude conversion labels as described in
the LABELS sections of this instruction on Page 4.
6.
Refer to the unit installation instructions to complete the
installation before continuing with these procedures.
TESTS AND ADJUSTMENTS
The following tests must be performed at the time of conver-
sion following completion of the installation.
1.
Connect a manometer to the pressure tap on both the
inlet and outlet side of the gas valve. Connect a power
supply and a gas supply to the unit, if not already con-
nected.
2.
Turn on the gas supply and bleed air from the gas supply
lines at a point as close to the inlet or the gas valve as is
practical.
3.
Turn the gas valve control knob to the ON position.
4.
Make sure unit electrical disconnect switch is in the OFF
position.
5.
Set the room thermostat to call for heat.
Table 3:
ALTITUDE/NATURAL GAS HEATING VALUE ORIFICE SELECTION
NATURAL GAS
HEATING VALUE
(MANIFOLD
PRESSURE
3.5" W.C.)
ORIFICE
SHIPPED
WITH UNIT
RECOMMENDED ORIFICE
ALTITUDE (FT. ABOVE SEA LEVEL)
0
2,000
3,000
4,000
5,000
6,000
7,000
8,000
9,000
10,000
1200 BTU/CU Ft.
45
48
49
49
50
50
50
51
51
52
52
43
45
46
47
47
47
48
48
49
49
49
1100 BTU/CU.FT.
45
47
48
48
49
49
49
50
50
51
51
43
44
45
45
45
46
47
47
48
48
49
1000 BTU/CU.FT.
45
45
46
47
47
47
48
48
49
49
50
43
43
44
44
44
45
45
46
47
47
48
900 BTU/CU.FT.
45
44
45
45
45
46
47
47
48
48
49
43
42
42
43
43
43
44
44
45
46
47
800 BTU/CU.FT.
45
43
44
44
44
45
45
46
47
47
48
43
39
40
41
41
42
42
43
43
44
44
Table 4:
ALTITUDE/PROPANE (LP) GAS HEATING VALUE ORIFICE SELECTION
PROPANE GAS HEATING
VALUE (MANIFOLD
PRESSURE 10.0” W.C.)
PROPANE
ORIFICE @
SEA LEVEL
RECOMMENDED ORIFICE
ALTITUDE (FT. ABOVE SEA LEVEL)
0
2,000
3,000
4,000
5,000
6,000
7,000
8,000
9,000
10,000
2516 BTU/CU FT.
54
54
54
55
55
55
55
55
56
56
56
55
55
55
55
55
56
56
56
56
56
57
56
56
56
56
57
57
57
58
59
59
60
Table 5:
ORIFICE PART NUMBERS
BURNER ORIFICES
Size #
Source 1 Part Number
Blank
029-20423-000
41
029-20423-041
42
029-20423-042
43
029-24243-043
44
029-20423-044
45
029-20423-045
46
029-20423-046
47
029-20423-047
48
029-20423-048
49
029-20423-049
50
029-20423-050
51
029-20423-051
52
029-20423-052
55
029-20423-055
56
029-20423-056
57
029-20423-057
58
029-20423-058
59
029-20423-059
60
029-20423-060
Make sure both gas and power supplies are shut
off before proceeding.
Make sure the space is free of gas before pro-
ceeding.
