PRODUCT DESIGN
6
High Altitude Derate - U.S. Installations Only
I
MPORTANT NOTE:
The gas/electric units naturally derate
with altitude. Do not attempt to increase the firing rate by
changing orifices or increasing the manifold pressure. This
can cause poor combustion and equipment failure. At all
altitudes, the manifold pressure must be within 0.3 inches
W.C. of that listed on the nameplate for the fuel used. At all
altitudes and with either fuel, the air temperature rise must
be within the range listed on the unit nameplate. Refer to the
Installation Manual provided with the LP kit for conversion
from natural gas to propane gas and for altitude adjustments.
When this package unit is installed at high altitude, the ap-
propriate High Altitude orifice kit must be installed. As alti-
tude increases, there is a natural reduction in the density of
both the gas fuel and combustion air. This kit will provide the
proper design certified input rate within the specified altitude
range. High altitude kits are not approved for use in Canada.
For installations above 2,000 feet, use kit HA-02. The HA-02
kit is used for both Natural and LP gas at high altitudes.
Use LPM-06 propane conversion kit for propane conversions
at altitudes below 2000 feet. Natural gas installations below
2000 feet do not require a kit.
For propane conversions above 2000 feet, high altitude kit
HA-02 is required in addtion to LPM-05 propane conversion
kit.
2000 3000 4000 4500 5000 6000 7000 8000
U.S. BURNER ORIFICE
45/55 47/55 47/56
-
47/56 48/57 48/58 49/58
CANADA BURNER ORIFICE
45/55
-
-
48/57
-
-
-
-
2000 3000 4000 4500 5000 6000 7000 8000
U.S. BURNER ORIFICE
44/55 44/55 45/56
-
45/56 46/57 47/58 47/58
CANADA BURNER ORIFICE
44/55
-
-
47/57
-
-
-
-
2000 3000 4000 4500 5000 6000 7000 8000
U.S. BURNER ORIFICE
43/55 43/55 44/56
-
44/56 44/56 45/57 45/57
CANADA BURNER ORIFICE
43/55
-
-
46/57
-
-
-
-
ELEVATION ABOVE SEA-LEVEL (FEET)
20,000 BTUH NAT/20,OOO BTUH/L.P.
INPUT/BURNER
INPUT/BURNER
HIGH ALTITUDE
KIT
HA02
HIGH ALTITUDE
KIT
22,500 BTUH NAT/20,OOO BTUH/L.P.
ELEVATION ABOVE SEA-LEVEL (FEET)
HA02
HA02
INPUT/BURNER
25,000 BTUH NAT/20,OOO BTUH/L.P.
ELEVATION ABOVE SEA-LEVEL (FEET)
HIGH ALTITUDE
KIT
NATURAL GAS AND LP GAS INSTALLATIONS AT ALTITUDES > 2000 FT
