K-Series Packaged Gas / Electric 7.5 to 12.5 Ton / Page 17
SPECIFICATIONS - GAS HEAT
Heat Input Type
Standard
Medium
High
Number of Gas Heat Stages
2
2
2
Gas Heating
Performance
Input - Btuh
First Stage
84,500
117,000
156,000
Second Stage
130,000
180,000
240,000
Output - Btuh
Second Stage
104,000
144,000
192000
Temperature Rise Range - °F
15-45
30-60
40-70
Thermal Efficiency
80%
80%
80%
Gas Supply Connections
3/4 in NPT
3/4 in NPT
3/4 in NPT
Recommended Gas Supply
Pressure - in. w.g.
Natural
7
7
7
LPG/Propane
11
11
11
HIGH ALTITUDE DERATE
Units may be installed at altitudes up to 2000 feet above sea level without any modification.
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% for each 1000 feet above sea level.
NOTE − This is the only permissible derate for these units.
Gas Heat
Type
Altitude
Gas Manifold Pressure
Input Rate
Natural Gas or LPG/Propane
Natural Gas
LPG/Propane Gas
First Stage
Second Stage
ft.
In. w.g.
In. w.g.
Btuh
Btuh
Standard
2001-4500
3.4
9.6
84,500
124,000
Medium
2001-4500
3.4
9.6
117,000
172,000
High
2001-4500
3.4
9.6
156,000
230,000
