FINAL PROCEDURE
INSTALL FURNACE DOORS
Install the lower door first by sliding the bottom of the door down until the tabs on the casing base engage the slots in the bottom door end cap. Then push the top of the lower door in until the door clips snap into place. Install the upper door in a similar manner, first engaging the slots in the top of the upper door on the tabs on the casing top. Then snap the bottom of the upper door into place against the casing.
FINISH AND TRIM
Alcove and Closet Installations may now be finished and trimmed as necessary.
/AUTOMATIC DAMPER
FURNACE
BASE
DUCT
CONNECTOR
NOTE: FOR BEST AIR DELIVERY INSTALL DAMPER WITH BLADES PARALLEL TO SUPPLY DUCT.
FIGURE 24 :
FURNACE AND AIR CONDITIONER
INSTALLATIONS
If an air conditioner is installed which does not use the blower for air distribution and operates completely independent of the furnace, the thermostat system must have an interlock to prevent the furnace and air conditioner from operating at the
same time. This interlock system usually contains a
vate either heating or cooling operation, or a positive OFF switch on the cooling thermostat.
When used in connection with a cooling unit the furnace shall be installed parallel with or on the upstream side of the cool- ing unit to avoid condensation in the heat exchanger.
For installations with a parallel flow arrangement, the furnace must be equipped with a damper to prevent cold air from being discharged up around the heat exchanger. Cold air causes condensation inside the exchanger and can cause it to rust out which can allow products of combustion to be cir- culated into the living area by the furnace blower resulting in possible asphyxiation. An air flow activated automatic damper, PIN
NOTE: See label on coil panel for conversion and lighting instructions. Obtain a temperature rise within the ranges specified on the name plate.
20 | Unitary Products Group |
