COMFORT-AIRE GDD92A, Руководство по установке

Страница: 9 / 52

507714-01 Page 9 of 52 Issue 1716
If this unit is being installed in an application with
combustion air coming in from a space serviced by an
exhaust fan, power exhaust fan, or other device which
may create a negative pressure in the space, take care
when sizing the inlet air opening. The inlet air opening
must be sized to accommodate the maximum volume
of exhaust air as well as the maximum volume of
combustion air required for all gas appliances serviced
by this space.
WARNING
Figure 9. Equipment in Confined Space - All Air from
Outside
Figure 10. Equipment in Confined Space - all Air from
Outside
Installation
Setting Equipment
Do not install the furnace on its front, back or in the
horizontal position. See Figure 13. Do not connect the
return air ducts to the back of the furnace. Doing so
will adversely affect the operation of the safety control
devices, which could result in personal injury or death.
WARNING
Select a location that allows for the required clearances
that are listed on the unit nameplate. Also consider gas
supply connections, electrical supply, vent connection,
condensate trap and drain connections, and installation
and service clearances [24 inches (610 mm) at unit front].
The unit must be level from side to side. Tilt the unit slightly
(maximum 1/2 in. from level) from back to front to aid in the
draining of the heat exchanger. See Figure 12.
Figure 12. Setting Equipment
Shipping Bolt Removal
Units with a 1/2 hp blower motors are equipped with three
flexible legs and one rigid leg. The rigid leg is equipped
with a shipping bolt and a flat white plastic washer (rather
than the rubber mounting grommet used with a flexible
mounting leg). See Figure 11. The bolt and washer must
be removed before the furnace is placed into operation.
After the bolt and washer have been removed, the rigid leg
will not touch the blower housing.
Figure 11.
Units with 1/2 HP Blower Motor