Table of Contents
Advertisement
•
A room thermostat must control the furnace. The use
of fixed jumpers that will provide continuous heating is
not allowed.
•
The return air duct must be provided and sealed to the
furnace.
•
Return air temperature range between 60°F (16°C)
and 80°F (27°C) must be maintained.
•
Air filters must be installed in the system and must be
maintained during construction.
•
Air filters must be replaced upon construction
completion.
•
The input rate and temperature rise must be set per
the furnace rating plate.
•
One hundred percent (100%) outdoor air must be
provided for combustion air requirements during
construction.
•
The furnace heat exchanger, components, duct system,
air filters and evaporator coils must be thoroughly
cleaned following final construction cleanup.
•
All furnace operating conditions (including ignition,
input rate, temperature rise and venting) must be
verified according to these installation instructions.
General
These units should not be installed in areas normally
subject to freezing temperatures.
These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
having jurisdiction before installation.
In addition to the requirements outlined previously, the
following general recommendations should be considered
when installing one of these furnaces:
•
Place the furnace as close to the center of the air
distribution system as possible. The furnace should
also be located close to the vent termination point.
•
When the furnace is installed in an attic or other
insulated space, keep insulation away from the
furnace.
•
When the furnace is installed in an unconditioned
space, consider provisions required to prevent freezing
of condensate drain system.
Page 6 of 66
CAUTION
Installation – Setting Equipment
Do not install the furnace on its front or its back. See
Figure 4.
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.
Upflow Applications
This gas furnace can be installed as shipped in the upflow
position. Refer to Figure 10 for clearances.
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, for proper
operation. It is recommended to tilt the unit slightly toward
the drain to insure proper drainage. See Figure 5.
GUH97M applications which include side return air and a
condensate trap installed on the same side of the cabinet
(trap can be installed remotely within 5 feet) require either a
return air base or field fabricated transition to accommodate
an optional IAQ accessory taller than 14.5". See Figure 6.
Issue 1809
WARNING
WARNING
Figure 4.
507028-03
Advertisement
Table of Contents
