J801X Installation Manual

10
casing, bend the flanges on the coil casing upward 90°
before attaching the supply air duct.
• Position the supply air ductwork onto the furnace ensuring
even alignment of furnace air opening and supply air duct.
NOTE: The ductwork must have an opening equal to that
of the supply air opening of the furnace. See Figure 16 for
supply air opening size.
Acoustical Treatments
Damping ducts, flexible vibration isolators, or pleated media-
style filters on the return air inlet of the furnace may be used
to reduce the transmission of equipment noise eminating
from the furnace. These treatments can produce a quieter
installation, particularly in the heated space. However, they
can increase the pressure drop in the duct system. Care
must be taken to maintain the proper maximum pressure rise
across the furnace, temperature rise and flow rate. This may
mean increasing the duct size and/or reducing the blower
speed. These treatments must be constructed and installed in
accordance with NFPA and SMACNA construction standards.
Consult with local codes for special requirements. For best
sound performance, be sure to install all the needed gaskets
and grommets around penetrations into the furnace, such
as for electrical wiring.
FURNACE INSTALLATION
These Installation procedures are suggested for typical
furnace installations. Since each installation is different,
the sequence of instructions may differ from the actual
installation. Only qualified HVAC technicians should
install this furnace.
The installer must be familiar with and comply with all codes
and regulations applicable to the installation of these heating
appliances and related equipment. In the absence of local
codes, the installation must be in accordance with the current
provisions of one or more of the following standards.
• American National Standard (ANSI-Z223.1/NFPA-54).
• American National Standard (ANSI-C1/NFPA-70).
About The Furnace
The Ultra-Low NOx series furnace is designed only for indoor
dry installations and can be readily connected to the high
static duct system of a home. Ultra-Low NOx series gas
furnaces are shipped ready for installation in the upflow or
horizontal right or left positions. Units are approved for single
/ multistory residential structures in freestanding /closet /
alcove configurations.
This appliance will provide many years of safe and dependable
comfort, providing it is properly installed and maintained.
Abuse, improper use, and/or improper maintenance can
shorten the life of the appliance and create unsafe hazards.
Please read all instructions before installing the unit.
Approved installation, operation, and maintenance of this
appliance must be in accordance with the listed specifications
contained in these instructions and other documents supplied
with the furnace and/or optional air conditioning equipment.
Unless it is noted differently in this manual, only use factory
authorized kits and accessories on this appliance. Refer to
local authorities having jurisdiction for further information.
Before You Install the Furnace
√ This equipment is securely packaged at the time of
shipment and upon arrival should be carefully inspected
for damage prior to installing the equipment at the job site.
Claims for damage (apparent or concealed) should be filed
immediately with the carrier.
√ Check the electrical supply and verify the power supply
is adequate for unit operation. The system must be wired
and provided with circuit protection in accordance with
local building codes. If there is any question concerning
the power supply, contact the local power company.
√ Verify the air delivery of the furnace is adequate to handle
the static pressure drop of the coil, filter, and duct work.
Locating the Furnace
• The dimensions of the room or alcove must be able to
accommodate the overall size of the furnace and required
clearances to combustible materials listed in Figure 1,
(page 5). Access for positioning and servicing must
also be considered when locating the unit. To determine
the required clearances needed for installation, refer to
Figure 16, (page 18) for overall dimensions.
• The furnace must be installed on a solid surface and must
be level front-to-back and side-to-side at installation. The
surface that the furnace is mounted on must provide sound
physical support of the unit. Secure the furnace to the floor.
• The furnace should be installed as close to the center of
the air distribution system as possible and attached to a
properly installed duct system. Do not use the back of
the furnace for return air. See page 9 for circulating
requirements.
• The furnace must be installed so that all electrical
components are protected from water.
• The plenum attached to the A/C coil box and ductwork
within 3 ft. of the furnace must be installed so that surfaces
are at least 1” from combustible construction.
• When installed in a residential garage, the furnace must
be positioned so the burners and the source of the ignition
are located no less than 18 inches above the floor and
protected from physical damage by vehicles.
• The furnace must be installed upstream from a refrigeration
system.
• The furnace requires special venting materials and
installation procedures. See page 8 & page 9 for
venting guidelines and specifications.
Upflow Furnaces
WARNING:
The furnace must not be installed directly on
carpeting, tile, or any combustible material other
than wood flooring. Failure to comply may result
in fire, property damage or personal injury.
Ultra-Low NOx series gas furnaces are shipped with the
bottom panel installed as shown in Figure 16, (page 18).
If the furnace is installed with only side return air, the bottom
panel must not be removed. If the furnace is installed with
bottom return air, the bottom panel must be removed. See
Bottom Panel Removal on page 11.