Lennox Merit Series Installation Instructions

Page 45
TABLE 15
Manifold and Supply Line Pressure 0-10,000ft.
ML196
Unit
Gas
Manifold Pressure in. wg. Supply Line Pressure
in. w.g.
0 - 10000 ft.
0 - 4500 ft 4501 - 5500 ft 5501 - 6500 ft 6501 - 7500 ft 7501 - 10,000 ft
All
Models
Natural 3.5 3.3 3.2 3.1 3.5 4.5 13.0
L.P. Propane 10.0 9.4 9.1 8.9 10.0 11.0 13.0
NOTE - 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.
TABLE 16
Conversion Kit and Pressure Switch Requirements at Varying Altitudes
ML196 Model
Natural to LP/
Propane
High Altitude
Natural Burner
Orice Kit
High Altitude
LP/Propane Burner
Orice Kit
High Altitude Pressure Switch
0 - 7500 ft
(0 - 2286m)
7501 - 10,000 f t
(2286 - 3038m)
7501 - 10,000 ft
(2286 - 3038m)
4501 - 7500 ft
(1373 - 2286m)
7501 -10,000 ft
(2286 - 3048m)
-030 17H63 14C90 17H66 11U65 11U66
-045
*11K49 73W37 *11K44
11U65 11U66
-070 11U71 11U67
-090 11U70 11U64
-110 11U71 11U64
-135 11U70 11U68
Pressure switch is factory set. No adjustment necessary. All models use the factory-installed pressure switch from 0-4500 feet (0-
1370 m).

Lennox Merit Series Specifications

General

Brand	Lennox
Model	Merit Series
Category	Furnace
Language	English