Filters - Read This Section Before Installing The Return Air Ductwork; Upright Installations; Circulation Air Filters; Horizontal Installations - Goodman GME8 Installation Instructions Manual

A closed return duct system must be used, with the return duct
connected to the furnace. NOTE: Ductwork must never be attached
to the back of the furnace. Supply and return connections to the
furnace may be made with flexible joints to reduce noise
transmission. To prevent the blower from interfering with
combustion air or draft when a central return is used, a connecting
duct must be installed between the unit and the utility room wall. A
room, closet, or alcove must not be used as a return air chamber.
When the furnace is used in connection with a cooling unit, the
furnace should be installed in parallel with or on the upstream
side of the cooling unit to avoid condensation in the heating
element. With a parallel flow arrangement, the dampers or other
means used to control the flow of air must be adequate to prevent
chilled air from entering the furnace and, if manually operated,
must be equipped with means to prevent operation of either unit
unless the damper is in the full heat or cool position.
When the furnace is installed without a cooling coil, it is
recommended that a removable access panel be provided in the
outlet air duct. This opening shall be accessible when the furnace
is installed and shall be of such a size that the heat exchanger
can be viewed for visual light inspection or such that a sampling
probe can be inserted into the airstream. The access panel must
be made to prevent air leaks when the furnace is in operation.
When the furnace is heating, the temperature of the return air
entering the furnace must be between 55°F and 100°F.
When a furnace is installed so that supply ducts carry air circulated
by the furnace to areas outside the space containing the furnace,
the return air shall also be handled by a duct sealed to the furnace
casing and terminating outside the space containing the furnace.
F - R T S
ILTERS EAD HIS ECTION
R A D
ETURN IR UCTWORK
Filters must be used with this furnace. Discuss filter maintenance
with the building owner. Filters do not ship with this furnace, but
must be provided by the installer. Filters must comply with UL900
or CAN/ULCS111 standards. If the furnace is installed without
filters, the warranty will be voided.
NOTE: An undersized opening will cause reduced airflow. The
bottom return is set up as a knock out.
U I
PRIGHT NSTALLATIONS
Depending on the installation and/or customer preference,
differing filter arrangements can be applied. Filters can be
installed in the central return register or a side panel external filter
rack kit (upflows). As an alternative, a media air filter or electronic
air cleaner can be used as the requested filter.
C A F
IRCULATION IR ILTERS
One of the most common causes of a problem in a forced air
heating system is a blocked or dirty filter. Circulating air filters
must be inspected monthly for dirt accumulation and replaced if
necessary. Failure to maintain clean filters can cause premature
heat exchanger failure.
A new home may require more frequent replacement until all
construction dust and dirt is removed. Circulating air filters are to
be installed in the return air duct external to the furnace cabinet.
B I T
EFORE NSTALLING HE
MINIMUM FILTER SIZES
FURNACE INPUT
45M
70M
90M
115M
140M
45M
70M
90M
115M
140M
PERMANENT NOMINAL 600 F.M. FACE VELOCITY
DISPOSABLE NOMINAL 300 F.M. FACE VELOCITY
H I
ORIZONTAL NSTALLATIONS
Filters must be installed in either the central return register or in
the return air duct work.
XI. SEQUENCE OF OPERATION
(INTEGRATED IGNITION CONTROL)
Refer to Timing Charts for sequencing.
P U
OWER P
•
115 VAC power applied to furnace.
•
Integrated ignition control performs internal checks.
•
Integrated ignition LED will light.
•
Integrated ignition control monitors safety circuits
continuously.
•
Furnace awaits call from thermostat.
H M
EATING ODE
(M DIP
ODE SWITCH IS SET TO
The normal operational sequence in heating mode is as follows:
•
R and W thermostat contacts close, initiating a call for heat.
•
Integrated control module performs safety circuit checks.
•
Induced draft blower is energized for 15 second pre-purge
period causing pressure switch contacts to close.
•
Igniter warm up begins after 15 second prepurge expires.
•
Low and high-stage gas valves open at end of igniter warm
up period, delivering gas to burners and establishing flame.
•
Integrated control module monitors flame presence. Gas
valve will remain open only if flame is detected.
•
Circulator blower is energized on high heat speed following
a fixed thirty second blower on delay. Electronic air cleaner
terminals are energized with circulator blower.
•
Furnace operates; integrated control module monitors
safety circuits continuously.
•
R and W thermostat contacts open, completing the call for
heat.
•
Gas valve closes, extinguishing flame.
•
Induced draft blower is de-energized following a fifteen
second post purge.
21
FILTER SIZE TYPE
2
permanent
160 in
2
permanent
241 in
2
permanent
320 in
2
permanent
400 in
2
permanent
370 in
2
disposable
320 in
2
disposable
483 in
2
disposable
640 in
2
disposable
800 in
2
disposable
738 in
"1 STG" )
POSITION