Armstrong Air Conditioning A96DS2V - Proper Combustion

507405-05Page 54 of 72 Issue 1621
High Altitude Information
NOTE: In Canada, certication for installations at elevations
over 4500 feet (1371 m) is the jurisdiction of local authorities.
Units may be installed at altitudes up to 10,000 ft. above
sea level without manifold adjustment. Units installed at
altitude of 4501 - 10,000 feet (1371 to 3048 m) may require
a pressure switch change which can be ordered separately.
Table 17 list conversion kit and pressure switch requirements
at varying altitudes.
The combustion air pressure switch is factory-set and
requires no adjustment.
NOTE: A natural to LP/propane gas changeover kit is
necessary to convert this unit. Refer to the changeover kit
installation instruction for the conversion procedure.
Proper Combustion
Furnace should operate minimum 15 minutes with correct
manifold pressure and gas flow rate before checking
combustion. Take combustion sample beyond the ue
outlet and compare to Table 22. The maximum carbon
monoxide reading should not exceed 100 ppm.
A96DS2V
Gas
Manifold Pressure in w.g.
Supply Line
Pressure in
w.g.
0 - 10000 ft.
0 - 4500 ft. 4501 - 5500 ft. 5501 - 6500ft. 6501 - 7500ft. 7501-10000ft.
Low
Fire
High
Fire
Low
Fire
High
Fire
Low
Fire
High
Fire
Low
Fire
High
Fire
Low
Fire
High
Fire
Min. Max.
All Models
Natural 1.7 3.5 1.6 3.3 1.5 3.2 1.5 3.1 1.7 3.5 4.5 13.0
Lp/Propane 4.9 10.0 4.6 9.4 4.4 9.1 4.3 8.9 4.9 10.0 11.0 13.0
Manifold and Supply Line Pressures Altitudes
Table 21
Table 23
A96DS2V
Natural to LP/
Propane
High Altitude
Natural Burner
Orice Kit
High Altitude
LP/Propane Burner
Orice Kit
High Altitude Pressure switch
0 - 7500 ft
(0 - 2286m)
7501 - 10000 ft
(2286 - 3048m)
7501 - 10000 ft
(2286 - 3048m)
4501 - 7500 ft
(1371 - 2286m)
7501 - 10000 ft
(2286 - 3048m)
045
11K48 *51W01 11K47
14A47 14A50
070 14A55 14A56
090 14A54 14A53
110 14A46 14A51
Conversion Kit Fan Pressure Switch Requirements at Varying Altitudes
*Conversion requires installation of a gas valve manifold spring which is provided with the gas conversion kit.
Pressure switch is factory set. No adjustment necessary. All models use the factory-installed pressure switch from 0-4500 feet (0-1371 m).
Table 22
A96DS2V
CO
2
% for Nat CO
2
% for L.P.
Low Fire High Fire Low Fire High Fire
045 5.6 - 6.6 7.8 - 8.8 6.6 - 7.6 9.1 - 10.1
070 5.5 - 6.5 7.3 - 8.3 6.5 - 7.5 8.6 - 9.6
090 5.9 - 6.9 7.8 - 8.8 6.9 - 7.9 9.1 - 10.1
110 6.3 - 7.3 8.2 - 9.2 7.3 - 8.3 9.5 - 10.5
The maximum carbon monoxide reading should not exceed 100 ppm.