Page 26
TABLE 11
Manifold Pressure Settings at all Altitudes
Model
Input Size
Gas 0 - 4500 ft. 4501 - 7500 ft . 7501 - 10,000 ft.
Line Pressure in. wg.
Min Max
045
Nat 3.5 3.5 3.5 4.5 13.0
LP/Propane 10.0 10.0 10.0 11.0 13.0
070
Nat 3.5 3.3 3.5 4.5 13.0
LP/Propane 10.0 10.0 10.0 11.0 13.0
090
Nat 3.5 3.3 3.5 4.5 13.0
LP/Propane 10.0 10.0 10.0 11.0 13.0
110
Nat 3.5 3.3 3.5 4.5 13.0
LP/Propane 10.0 10.0 10.0 11.0 13.0
TABLE 12
Pressure Switch and Gas Conversion Kits at all Altitudes
Model
Input Size
High Altitude Pressure Switch Kit
High Altitude
Natural Gas
Natural Gas to LP/Propane
LP/Propane
to
Natural
Gas
Burner
0-4500 ft 4501-7500 ft 7501-10,000 ft 7501- 10,000 ft 0 - 7500 ft 7501- 10,000 ft 0 - 7500 ft
045
No
Change
No Change
80W51
73W37 11K49 11K44 73W81
070 80W52
090 No Change
110 80W52
NOTE - A natural to L.P. Propane gas changeover kit is necessary to convert this unit. Refer to the changeover kit instal-
lation instruction for the conversion procedure.
Other Unit Adjustments
Primary and Secondary Limits
The primary limit is located on the heating compartment
vestibule panel. The secondary limits (if equipped) are lo-
cated in the blower compartment, attached to the back
side of the blower. These auto reset limits are factory-set
and require no adjustment.
Pressure Switch
The pressure switch is located in the heating compartment
adjacent to the combustion air inducer. The switch checks
for proper combustion air inducer operation before allow-
ing ignition trial. The switch is factory-set and requires no
adjustment.
Temperature Rise
After the furnace has been started, and supply and return
air temperatures have been allowed to stabilize, check the
temperature rise. If necessary, adjust the blower speed
to maintain the temperature rise within the range shown
on the unit nameplate. Increase the blower speed to de-
crease the temperature. See TABLE 13 for allowable
heating speeds. Decrease the blower speed to increase
the temperature rise. Failure to adjust the temperature
rise may cause erratic limit operation.
Fan Control
Ignition Control 103217-03
The heat fan-on time of 30 seconds is not adjustable. The
-
pins on the integrated control. The unit is shipped with a
-
air temperature between 90° and 110°F at the moment
provide lower return air temperatures; shorter settings
Ignition Control 107163-01
The heat fan-on time of 30 seconds is not adjustable The
-
adjusted by changing the two position dip switch on the
-
settings, please refer to the following chart:
To Next Page
Loading...
