Proper Combustion; High Altitude - Aire-Flo 95AF2DF045V12B Installation Instructions Manual

Proper Combustion

Furnace should operate minimum 15 minutes with correct
manifold pressure and gas flow rate before checking com­
bustion. Take combustion sample beyond the flue outlet
and compare to the tables below.
TABLE 16
CO %
95AF2
2 For Nat
Model
Low Fire High Fire
045 5.6 - 6.6 7.8 - 8.8
070 5.5 - 6.5 7.3 - 8.3
090 5.9 - 6.9 7.8 - 8.8
110 6.3 - 7.3 8.2 - 9.2
The maximum carbon monoxide reading should not exceed 50 ppm.
95AF2
Unit
All Sizes
NOTE -
A natural to L.P. propane gas changeover kit is necessary to convert this unit. Refer to the changeover kit installation instruction for the conversion
procedure.
LP/Propane Conversion Kit and Pressure Switch Requirements at Varying Altitudes
Natural to
LP/Propane
95AF2
Unit
0 - 7500 ft
(0 - 2286m)
-045
-070
*78W93
-090
-110
* 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 (0-1370 m).
CO %
2 For L.P
Low Fire High Fire
6.6 - 7.6 9.1 - 10.1
6.5 - 7.5 8.6 - 9.6
6.9 - 7.9 9.1 - 10.1
7.3 - 8.3 9.5 - 10.5
Manifold and Supply Line Pressure 0-10,000ft.
Manifold Pressure in.wg.
Gas
Low Fire
Natural 1.7
LP/propane 4.9

High Altitude

Natural Burner
Orifice Kit
7501 - 10,000 ft
(2286 - 3038m)
78W37
High Altitude
NOTE - In Canada, certification for installations at eleva­
tions over 4500 feet (1372 m) is the jurisdiction of local au­
thorities.
Units may be installed at altitudes up to 10,000 ft. above
sea level without manifold adjustment. Units installed at al­
titude of 4501 - 10,000 feet (1373 to 3048m) may require a
pressure switch change which can be ordered separately.
Table 18 lists conversion kit and pressure switch require­
ments at varying altitudes.
The combustion air pressure switch is factory-set and re­
quires no adjustment.
TABLE 17
High Fire
3.5
10.0
TABLE 18
High Altitude
LP/Propane Burner
Orifice Kit
7501 - 10,000 ft
(2286 - 3038m)
*78W96
Page 43
Supply Line Pressure in. w.g.
Min
4.5
11.0
High Altitude Pressure Switch
4501 - 7500 ft 7501 -10,000 ft
(1373 - 2286m) (2286 - 3048m)
93W81 93W84
93W80 93W85
93W82 93W80
93W80 93W85
Max
10.5
13.0