Lennox LGT Series Unit Information page 7

SP ECIF ICATION S
Gas Heating Input - Btuh
Performance
Output - Btuh
Recommended Gas Supply Pressure - Nat. / LPG
Gas Supply Pressure Range
HIG H A LT IT UDE DERATE
NOTE - Units may be installed at altitudes up to 2000 feet above sea level without any modifications.
At altitudes above 2000 feet units must be derated to match gas manifold pressures shown in table below.
At altitudes above 4500 feet unit must be derated 2% (130K through 180K) and 4% (240K) for each 1000 feet
above sea level.
NOTE - This is the only permissible derate for these units.
Refer to the Installation Instructions for more detailed information.
Heat Input Type
Standard (2 stage)
Medium (2 stage)
High (2 stage)
Heat Input Type
Number of Gas Heat Stages
First Stage
Second Stage
Second Stage
Temperature Rise Range - °F
Minimum Air Volume - cfm
Thermal Efficiency
Gas Supply Connections
Min./Max. (Natural)
Min./Max. (LPG)
Altitude Feet
2001 - 4500
2001 - 4500
2001 - 4500
Standard
2
84,500
130,000
104,000
15 - 45
2150
80%
3/4 in. NPT
7 in. w.g. / 11 in. w.g.
Gas Manifold Pressure
in. w.g.
Natural Gas LPG/ Propane
1.6 / 3.4
1.6 / 3.4
1.6 / 3.4
Page 7
Medium
2
117,000
180,000
144,000
30 - 60
2250
80%
3/4 in. NPT
4.7 - 10.5 in. w.g.
10.8 - 13.5 in. w.g.
Input Rate (Btuh)
4.4 / 9.7 84,500 / 125,000
4.4 / 9.7 117,000 / 173,000
4.4 / 9.7 156,000 / 221,000
G A S HEAT
High
2
156,000
240,000
194,000
40 - 70
2600
81%
3/4 in. NPT.