Installation Manual

13
1. Slide the standard 18”x18”x1” filter into the space
between the combustion air pipe and the blower
assembly. See Figure 7 (page 12). NOTE: Make
sure the airflow arrows on the filter point towards the
blower assembly.
2. Push the filter to the rear of the furnace cabinet and
angle it up over the blower. Make sure the filter is
pushed back as far as possible.
3. Position the filter retainer under the filter and insert
the stepped ends into the 0.25 holes in the rear of
the furnace. NOTE: The stepped ends should be
facing upwards in the holes.
4. Evenly align the filter over the opening in the top of
the furnace cabinet and position the other end of
filter retainer up over the flange in the furnace’s top
panel. NOTE: To properly secure the filter, make
sure the filter retainer is properly positioned in the
top panel of the furnace. There should be no visible
air gaps. The retainer may slide left or right slightly,
but must not have any movement between the front
and rear. See Figure 7.
Replacement filters are available at most local retailers.
Inspect filters frequently and replace when necessary
with filter of same dimensional size. Filters designed to
remove smaller particles such as pollen, may require
additional maintenance.
Dampers
An automated shut off damper is required when the home
is air conditioned by a self-contained unit. A damper
is required to prevent chilled air from flowing over the
furnace heat exchanger. This damper is designed to fit
in the feeder duct cavity, directly under the furnace. For
proper installation, refer to the instructions provided with
the damper. See replacement parts list provided online.
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,
install all the needed gaskets and grommets around
penetrations into the furnace, such as for electrical wiring.
FURNACE INSTALLATION
NOTE: 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.
Federal Manufactured Home Constructions & Safety
Standard (H.U.D. Title 24, Part 3280.707[a][2])
American National Standard (ANSI-119.2/NFPA-501C)
for all recreational vehicle installations.
American National Standard (ANSI-Z223.1/NFPA-54)
and/or CAN/CSA B149 for all gas-fired furnace models.
American National Standard (ANSI-Z95.1/NFPA-31)
and/or CSA B139 for all oil-fired furnace models.
American National Standard (NFPA-70) and/or CSA
22.1 Canadian Electric Code Part 1 for all electrical
field wiring.
Units have been researched under standards UL 307A
& B, UL727-1999, ANSI Z21.47b/CSA 2.3b-2008, and
CSA B140.10.
About The Furnace
The MG2R furnace is designed only for indoor installations
and can be readily connected to the high static duct
system of a home. Units are approved for single/multistory
residential or mobile/modular/manufactured structures in
freestanding/closet/alcove downflow only 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 this 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.