Page 50
TABLE 19
Manifold Pressure Settings
Unit
Input
Gas
Orifice Size
0 - 7500 ft.
Orifice Size
7501 -
10,000 ft
1.
Manifold
Pressure in. wg.
0 - 4500 ft
Manifold
Pressure in.
wg. 4501 -
7500 ft
Manifold Pressure
in. wg. 7500 -
7501 - 10,000 ft
2
Supply Line
Pressure
in. w.g.
Low
Firer
High
Fire
Low
Fire
High
Fire
Low
Fire
High
Fire
Min
Max
070
Natural
0.63
0.55
1.7
3.5
1.6
3.4
1.7
3.5
4.5
13.0
LP/propane
3
0.34
0.32
4.5
10.0
4.5
10.0
4.5
10.0
11.0
13.0
090
Natuarl
0.63
0.55
1.7
3.5
1.5
3.2
1.7
3.5
4.5
13.0
LP/propane
3
0.34
0.32
4.5
10.0
4.5
10.0
4.5
10.0
11.0
13.0
110
Natural
0.63
0.55
1.7
3.5
1.5
3.2
1.7
3.5
4.5
13.0
LP/propane
3
0.34
0.32
4.5
10.0
4.5
10.0
4.5
10.0
11.0
13.0
135
Natural
0.63
0.55
1.7
3.5
1.6
2.8
1.7
3.5
4.5
13.0
LP/propane
3
0.34
0.32
4.5
10.0
4.5
10.0
4.5
10.0
11.0
13.0
1
This is the only permissible derate for these units.
2
Natural gas high altitude orifice kit required.
3
A natural to L.P. propane gas changeover kit is necessary to convert this unit. Refer to the changeover kit installation instruction for the conver
-
sion procedure.
NOTE - Units may be installed at altitudes up to 4500 ft. above sea level without modifications
.
TABLE 20
Unit
Input
High Altitude Pressure Switch Kit
0 - 4500 ft. 4501 - 7500 ft. 7501 - 10,000 ft.
070 No Change
No Change
73W35
090 No Change
69W56
73W35
110
No Change
69W56
73W35
135 No Change
73W33
73W34
TABLE 21
Honeywell / Resideo Gas Valve Conversion Kits
Unit
Input
High Altitude
Natural Gas
Orifice Kit
Natural Gas to LP/
Propane Kit
LP/
Propane
to Natural
Gas Kit
7501 -
10,000 ft
0 - 7500 ft
7501 -
10,000 ft 0 - 7500 ft
070
73W37
51W02
73W38
69W79
090
110
135
TABLE 22
White Rodgers Gas Valve Conversion Kits
Unit
Input
High Altitude
Natural Gas
Orifice Kit
Natural Gas to LP/
Propane Kit
LP/
Propane
to Natural
Gas Kit
7501 -
10,000 ft
0 - 7500 ft
7501 -
10,000 ft 0 - 7500 ft
070
73W37
11K51
11K46
77W09
090
110
135
