Lennox SL280DF110V60C User Manual

Page 43
High Altitude
The manifold pressure, gas orice and pressure switch
may require adjustment or replacement to ensure proper
operation at higher altitudes. Tables 19 through 22 shows
manifold pressure, pressures switch and gas conversion
kits at all altitudes.
TABLE 19
Manifold Pressure Settings
Unit
Input
Gas
Orice Size
0 - 7500 ft.
Orice Size
0 - 7500 ft
1.
Manifold
Pressure in. wg.
0 - 4500 ft
Manifold
Pressure in. wg.
4500 - 7500 ft
Manifold Pressure
in. wg. 7500 -
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 .063 .055. 1.7 3.5 1.6 3.4 1.7 3.5 4.5 13.0
LP/propane
3
.034 .032 4.9 10.0 4.9 10.0 4.9 10.5 11.0 13.0
090
Natuarl .063 .055 1.7 3.5 1.5 3.2 1.7 3.5 4.5 13.0
LP/propane
3
.034 .032 4.9 10.0 4.9 10.0 4.9 10.0 11.0 13.0
110
Natural .063 .055 1.7 3.5 1.5 3.2 1.7 3.5 4.5 13.0
LP/propane
3
.034 .032 4.9 10.0 4.9 10.0 4.9 10.0 11.0 13.0
135
Natuarl .063 .055 1.7 3.5 1.6 2.8 1.7 3.5 4.5 13.0
LP/propane
3
.034 .032 4.9 10.0 4.9 10.0 4.9 10.0 11.0
1
This is the only permissible derate for these units.
2
Natural gas high altitude orice 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 conversion
procedure.
NOTE - Units may be installed at altitudes up to 4500 ft. above sea level without modications.
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 Gas Valve Conversion Kits
Unit
Input
High
Altitude
Natural Gas
Orice 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 73W37 51W02 73W38 69W79
110 73W37 51W02 73W38 69W79
135 73W37 51W02 73W38 69W79
TABLE 22
White Rodgers Gas Valve Conversion Kits
Unit
Input
High Altitude
Natural Gas
Orice 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

Lennox SL280DF110V60C Specifications

General

Brand	Lennox
Model	SL280DF110V60C
Category	Furnace
Language	English