Optional Accessories; High Altitude Derate - Lennox ML180UHE Manual

OPTIONAL ACCESSORIES - MUST BE ORDERED EXTRA
CABINET ACCESSORIES
Horizontal Suspension Kit - Horizontal only
Return Air Base - Upflow only
FILTERS
Air Filter and Rack Kit
1
VENTING
Vent Adaptor − 6 in. conn. size upflow applications only
Cleanable polyurethane, frame-type filter.
1
GAS HEAT ACCESSORIES
Pressure Switch Kit
Input
0 - 4500 ft. 4501 - 7500 ft. 7501 - 10,000 ft.
045 No Change
070 No Change
090 No Change
110 No Change
135 No Change

HIGH ALTITUDE DERATE

NOTE - Units may be installed at altitudes up to 2000 ft. above sea level without any modifications.
At altitudes above 2000 ft. units must be derated to match information in the shaded areas shown below.
NOTE - This is the only permissible derate for these units.
0 - 2000 Feet
Input
Natural LPG/
Gas Propane
045 3.5 10
070 3.5 10
090
3.5 10
110 3.5 10
135 3.5 10
Natural Gas High Altitude Orifice Kit required.
1
ML180UHE / Page 8
Horizontal (end)
Size of filter - in.
Side Return
Ten Pack
Size of filter - in.
High Altitude
80W52 80W51
80W52 80W51
80W52 80W51
80W52 80W52
80W52 80W51
Gas Manifold Pressure (Outlet) in. w.g.
2001 - 4500 Feet
Natural LPG/ Natural
Gas Propane
3.2 10
3.2 10
3.2 10
3.5 10
3.5 10
"A" Width
Models
51W10
65W75
87L95
14 x 25 x 1
44J22
Single
66K63
16 x 25 x 1
18M79
Natural Gas to
LPG/Propane Kit
0 - 7500 ft. 7501 - 10,000 ft.
70W89 76W15
70W89 76W15
70W89 76W15
70W89 76W15
70W89 76W15
4501 - 7500 Feet 7501 - 10,000 ft.
LPG/ Natural
1
Gas Propane Gas
3 10 3.5
2.8 10 3.5
2.7 9.6 3.5
3 9.6 3.5
2.9 9.6 3.5
"B" Width "C" Width
Models Models
51W10 51W10
50W98 50W99
87L96 87L97
18 x 25 x 1 20 x 25 x 1
44J22 44J22
66K63 66K63
16 x 25 x 1 16 x 25 x 1
18M79 18M79
LPG/Propane
to Natural Gas Kit
0 - 7500 ft.
73W81
73W81
73W81
73W81
73W81
Line Pressure - in. w.g.
Minimum
LPG/ Natural LPG/
Propane Gas Propane
10 4.5 11
10 4.5 11
10 4.5 11
10 4.5 11
10 4.5 11
"D" Width
Models
51W10
51W00
87L98
25 x 25 x 1
44J22
66K63
16 x 25 x 1
18M79
Natural Gas
High Altitude
Orifice Kit
7501 - 10,000 ft.
73W37
73W37
73W37
73W37
73W37
Maximum
13
13
13
13
13