Location Requirements And Considerations - Rheem Gra Series Installation Instructions Manual

LOCATION REQUIREMENTS AND CONSIDERATIONS

GENERAL INFORMATION
WARNING
!
DO NOT USE THIS FURNACE
DURING CONSTRUCTION IF AIR
LADEN CORROSIVE
COMPOUNDS ARE PRESENT
SUCH AS CHLORINE AND
FLUORINE. OTHERWISE,
PROVISIONS MUST BE TAKEN TO
PROVIDE CLEAN,
UNCONTAMINATED
COMBUSTION AND VENTILATION
AIR TO THE FURNACE. FURNACE
COMBUSTION AND VENTILATION
AIR CONTAMINATED WITH THESE
COMPOUNDS FORMS ACIDS
DURING COMBUSTION WHICH
CORRODES THE HEAT
EXCHANGER AND COMPONENT
PARTS. SOME OF THESE
CONTAMINANTS ARE FOUND IN,
BUT NOT LIMITED TO, PANELING,
DRY WALL, ADHESIVES, PAINTS,
STAINES, VARNISHES, SEALERS,
AND MASONRY CLEANING
MATERIALS.
WARNING
!
DO NOT INSTALL THIS FURNACE
IN A MOBILE HOME!! This furnace
is not approved for installation in a
mobile home. Doing so could cause
FIRE, PROPERTY DAMAGE,
PERSONAL INJURY OR DEATH.
WARNING
!
WHEN THIS FURNACE IS
INSTALLED IN A RESIDENTIAL
GARAGE, IT MUST BE INSTALLED
SO THE BURNERS AND IGNITION
SOURCE ARE LOCATED NO LESS
THAN 18 INCHES ABOVE THE
FLOOR. THIS IS TO PREVENT
THE RISK OF IGNITING
FLAMMABLE VAPORS WHICH
MAY BE PRESENT IN A GARAGE.
ALSO, THE FURNACE MUST BE
LOCATED OR PROTECTED TO
AVOID PHYSICAL DAMAGE BY
VEHICLES. FAILURE TO FOLLOW
THESE WARNINGS CAN CAUSE A
FIRE OR EXPLOSION, RESULTING
IN PROPERTY DAMAGE,
PERSONAL INJURY OR DEATH.
8 8
1. IMPORTANT: If installing the
unit over a finished ceiling or
living area, be certain to install an
auxiliary condensate drain pan
under the entire unit. This
auxiliary drain pan should extend
under any evaporator coil
installed with the furnace and the
open portion of the condensate
drain assembly. See
"Condensate Drain/Neutralizer"
section for more details.
2. IMPORTANT: If using a cooling
evaporator coil with this furnace:
a. be sure the air passes over
the heat exchanger before
passing over the cooling
coil. The cooled air passing
over the warm ambient air
inside the heat exchanger
tubes can cause
condensation inside the tubes
resulting in corrosion and
eventual failure.
b. install a parallel duct system
to divert all the air from the
furnace allowing it to pass
over the cooling coil only. Use
dampers or other means to
prevent chilled air from
passing over the heat
exchanger.
If these are manual dampers, they
must be equipped to prevent heating
or cooling operation unless the
damper is in the full heat or cool
position.
FIGURE 4
HORIZONTAL FURNACE W/HEAT TAPE ON CONDENSATE TRAP
DRAIN
PIPE
HEAT
TAPE
3. IMPORTANT: Install the furnace
level. If it is not level, condensate
cannot drain properly, possibly
causing furnace shut down.
NOTE: These furnaces are approved
for installation in attics, as well as
alcoves, utility rooms, closets and
crawlspaces. Provisions must be
made to prevent freezing of
condensate.
CAUTION
4.
!
If this furnace is installed in a
garage, attic and/or any
unconditioned space, install a
self-regulating heat tape
around the condensate trap
and along the entire length of
the condensate drain in the
unconditioned space. See
Figure 4.
When the condensing horizontal
gas furnace is installed in an
unconditioned space where the
temperature would be capable of
reaching close to or below 32°F
(0°C). a self-regulating heat tape
is required on the condensate
drain, along with an insulation
wrap. The heat tape should meet
the following requirements:
a. The heat tape must be UL
listed.
b. The heat tape must be
installed per the
manufacturer's instructions
for the entire length of drain
pipe in the unconditioned
space.
TRAP
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