High Altitude - Allied Air A80DS2V Installation Instructions Manual

High Altitude

The manifold pressure, gas orifice and pressure switch may
require adjustment or replacement to ensure proper
operation at higher altitudes. See Table 22 through 25 for
manifold pressures, pressure switch and gas conversion kits
at all altitudes.
1 This is the only permissible derate for these units.
2 Natural gas high altitude orifice kit required.
3 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.
NOTE: Units may be installed at altitudes up to 4500 ft. above sea level without modifications.
High Altitude Pressure Switch Kits
U n it
In p u t
0- 450 0 ft.
070 N o C h an ge
090 N o C h an ge
110 N o C h an ge
Honeywell Gas Valve Conversion Kits
High Altitude
Natural Gas
U n it
Orifice Kit
In p u t
750 1 -
0- 750 0 ft.
10,000 ft.
070 51W 01 68W 76
090 51W 01 68W 76
110 51W 01 68W 76
Page 42 of 64
Manifold Pressure Settings
H ig h A ltitu d e
P ress u re S w itc h K it
450 1 - 7 500 ft. 750 1 - 1 0,0 00 ft.
N o C h an ge 73W 35
69W 56 73W 35
69W 56 73W 35
Table 23
L P /P ro p a n e
N atu ral G as to
L P / P ro p a n e K it N atu ral G as
K it
750 1 -
0- 750 0 ft.
10,000 ft.
73W 65 73W 32
73W 65 73W 32
73W 65 73W 32
Table 24
OPERATION
For safety, shut unit OFF and remove manometer as
soon as an accurate reading has been obtained. Take
care to replace pressure tap plug.
Table 22
White Rodgers Gas Valve Conversion Kits
U n it
In p u t
070
090
to
110
Issue 1251
WARNING
H ig h A ltitu d e
N atu ral G as N atu ral G as to
O rific e K it L P / P ro p a n e K it
750 1 -
0-7 50 0 ft.
10,000 ft. 10,000 ft.
51W 01 77W 08
51W 01 77W 08
51W 01 77W 08
Table 25
L P /P ro p a n e
to
N atu ral G as
K it
750 1 -
0- 750 0 ft.
77W 12 77W 10
77W 12 77W 10
77W 12 77W 10
506892-01