Use and Care Manual

13
6-583.12
INSTALLATION - HIGH ALTITUDE ACCESSORY KIT
HIGH ALTITUDE ACCESSORY KIT
Altitude (ft)
Gas Heating Values at Altitude (BTU/ft
3
)
USA Canada
0-2,000 1,050 1,050
2,001-3,000 929
9453,001-4,000 892
4,001-4,500 874
4,501-5,000 856 856
5,001-6,000 822 822
6,001-7,000 789 789
7,001-8,000 757 757
8,001-9,000 727 727
9,001-10,000 698 698
Altitude (ft)
Gas Heating Values at Altitude (BTU/ft
3
)
USA Canada
0-2,000 2,500 2,500
2,001-3,000 2,212
2,2503,001-4,000 2,123
4,001-4,500 2,080
4,501-5,000 2,038 2,038
5,001-6,000 1,957 1,957
6,001-7,000 1,879 1,879
7,001-8,000 1,803 1,803
8,001-9,000 1,731 1,731
9,001-10,000 1,662 1,662
Table 13.1 - Natural Gas Heating Values at
Altitude jkm
Table 13.2 - Propane Gas Heating Values at
Altitude klm
Modine’s gas-fired equipment standard input ratings are
certified by ETL. For elevations above 2,000', ANSI Z223.1
requires ratings be reduced 4 percent for each 1000'. above sea
level. For units in Canada, CSA requires that ratings be reduced
10 percent at elevations above 2,000'. The high altitude
adjustment instructions and pressure switch kits listed in this
manual are for use with units that will be installed over 2,000'
These methods and kits comply with both ANSI Z223.1 and
CSA requirements.
If a unit is to be installed at higher elevations AND converted from
natural gas to propane gas operation, a propane conversion kit
must be used in conjunction with the pressure adjustment
methods and pressure switch kits listed herein. For the selection
and installation instructions for propane conversion kits, please
see the latest revision of Modine Manual 75-515.
Selection of the Proper Pressure and Kit
To determine the proper manifold pressure at altitude and if
required, the proper combustion air pressure switch kit, the full
model number of the heater, the fuel to be used, and the
altitude the unit will be installed at must be known. Refer to the
unit serial plate or carton label to obtain the necessary
information about the unit.
After obtaining this information, refer to the gas pressure and
selection charts shown in Tables 13.1 through 13.3. The pressure
charts are differentiated by elevation, fuel type, and country
the product is being installed in. The selection charts are
differentiated by product type, altitude and fuel type. If
converting from natural gas to propane gas and operation
at high altitude, both a propane conversion kit and a
pressure switch kit must be used (if applicable). Selection
charts include the proper kit suffix, when required.
Manifold Pressure Adjustment
The inlet pressure to the unit must be confirmed to be within
acceptable limits (6-7" W.C. for natural gas and 11-14" W.C.
for propane gas) before opening the shutoff valve or the
combination gas valve may be damaged.
Heaters for use with natural gas have gas valves that need to
be field set at 3.5” W.C. manifold pressure at 7.0” W.C. inlet
pressure.
Units for use with propane gas need to be field set for 10.0”
W.C. manifold pressure at 14.0” W.C. inlet pressure.
Installation above 2,000' elevation requires adjustment of the
manifold pressure as described.
Derated BTU Content Gas and Manifold Pressure
Calculation
Some utility companies may derate the BTU content (heating
value) of the gas provided at altitude to a value other than 1,050
BTU/ft
3
for natural gas or 2,500 BTU/ft
3
for propane gas to
allow certain heating appliances to be used with no manifold
pressure adjustments. For this reason it is necessary that the
supplying utility be contacted for detailed information about the
gas type and BTU content (heating value) before operating any
heater. Tables 13.1 and 13.2 show the standard derated heating
values (4% per 1,000' of elevation in the USA and 10% between
2,001' and 4,500' elevation in Canada) of natural and propane
gases at various altitudes. If the utility is supplying gas with
heating values as shown in Tables 13.1 and 13.2, the manifold
pressure should be set to 3.5" W.C for natural gas and 10.0"
W.C. for propane gas.
NOTE: Only the high fire gas pressure need be adjusted, low
fire gas pressure should remain the same.
j Values shown are for 3.5" W.C. manifold pressure, for other BTU content values (available from local utility) use Equation 14.1 to calculate manifold pressure.
k Values shown are for 10.0" W.C. manifold pressure, for other BTU content values (available from local utility) use Equation 14.1 to calculate manifold pressure.
l When installed at altitudes above 2,000', a pressure switch may need to be changed. Refer to Table 13.3 to determine if a switch change is required.
m Gas heating values are derated 4% per 1,000' of elevation in the USA and 10% between 2,000' and 4,500' elevation in Canada in accordance with ANSI Z223.1
and CSA-B149, respectively.
Table 13.3 - High Altitude Kits for HD/HDB j
j For Label Only kits, Modine part number 5H0807146005 is required to be lled out and attached to the unit by the installer.
Please contact the local Modine representative at 1.800.828.4328 (HEAT).
Model
Size
Details
U.S.A and Canada
0-2,000 ft 2,001-4,500 ft 4,501-5,500 ft 5,501-6,500 ft 6,501-7,500 ft 7,501-8,500 ft 8,501 - 9,500 ft 9,501-10,000 ft
30-60
Kit Su󰀩x
Not Required Label Only Label Only Label Only Label Only Label Only Label Only Label Only
Item Code
75
Kit Su󰀩x
Not Required Label Only Label Only Label Only Label Only Label Only
0001 0001
Item Code 68405 68405
100
Kit Su󰀩x
Not Required Label Only Label Only Label Only
0004 0004 0004 0004
Item Code 68408 68408 68408 68408
125
Kit Su󰀩x
Not Required Label Only Label Only
0004 0004 0004 0004 0004
Item Code 68408 68408 68408 68408 68408