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SPECIFICATIONS GAS HEAT
Heat Input Type Standard Medium High
Number of Gas Heat Stages 2 2 2
Gas Heating
Performance
Input - Btuh First Stage 117,000
Second Stage 130,000 180,000 240,000
Output - Btuh Second Stage 104,000 144,000 194,000
30 - 60 40 - 70
Minimum Air Volume - cfm 2600
80% 80% 81%
Gas Supply Connections 3/4 in. NPT 3/4 in. NPT 3/4 in. NPT.
Recommended Gas Supply Pressure - Nat. / LPG 7 in. w.g. / 11 in. w.g.
Gas Supply Pressure Range
HIGH ALTITUDE DERATE
NOTE - Units may be installed at altitudes up to 2000 feet above sea level without any modications.
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 Altitude Feet
Gas Manifold Pressure
in. w.g.
Input Rate (Btuh)
Natural Gas LPG/ Propane
1.6 / 3.4 4.4 / 9.7
1.6 / 3.4 4.4 / 9.7 117,000 / 173,000
1.6 / 3.4 4.4 / 9.7
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