GMS8 User Information Manual
7
2. Power interruption. Interrupt 115 volt power to the fur-
nace for greater than 20 seconds.
3. Thermostat cycle. Interrupt thermostat signal to the
furnace for between 0 and 20 seconds.
If the condition which originally caused the lockout still
exists, the control will return to lockout. If your furnace
frequently locks out, a problem exists which must be cor-
rected. Contact a qualified servicer.
R
OUTINE
M
AINTENANCE
Maintenance is to be performed by a qualified service tech-
nician only. User maintenance is to be restricted to fre-
quent air filter changes and to ensure the warnings and
notices found elsewhere in this manual be followed. We
recommend that at a minimum system maintenance be
performed by a qualified service technician prior to the
beginning of each heating season, and if equipped with air
conditioning, prior to air conditioning season.
P
ERSONAL
INJURY
OR
DEATH
MAY
RESULT
FROM
IMPROPER
MAINTENANCE
PERFORMED
BY
UNTRAINED
PERSONNEL
.C
ALL
YOUR
INSTALLING
DEALER
OR
OTHER
QUALIFIED
SERVICE
COMPANIES
TO
PERFORM
THE
MAINTENANCE
INSPECTION
.
WARNING
T
O
PREVENT
PERSONAL
INJURY
OR
DEATH
DUE
TO
ELECTRIC
SHOCK
,
DISCONNECT
ELECT RICAL
POWER
BEFORE
SERVICING
THIS
UNIT
.
WARNING
ANNUAL INSPECTION
The furnace should be inspected by a qualified installer, or
service agency at least once per year. This check should be
performed at the beginning of the heating season by a quali-
fied technician. This will insure that all furnace compo-
nents are in proper working order and that the heating sys-
tem functions appropriately. Particular attention should
be paid to the following items. Repair or service as neces-
sary.
Check the
Burner Flames for:
1. Stable, soft and blue.
2. Not curling, floating
or lifting off.
• Flue pipe system. Check for blockage and/or leakage.
Check the outside termination and the connections at
and internal to the furnace.
• Combustion air intake pipe system (where applicable).
Check for blockage and/or leakage. Check the outside
termination and the connection at the furnace.
• Heat exchanger. Check for corrosion and/or buildup
within the heat exchanger passageways.
• Burners. Check for proper ignition, burner flame, and
flame sense. Flames should extend directly outward
from burners without curling, floating or lifting off.
• Wiring. Check electrical connections for tightness and/
or corrosion. Check wires for damage.
• Drainage system. Check for blockage and/or leakage.
Check hose connections at and internal to furnace.
• Filters. Check that filters are clean and in the proper
placement in the furnace or duct system.
MOTORS
The combustion air motor and indoor blower motor are per-
manently lubricated and require no further lubrication.
FILTERS
T
O
AVOID
PROPE RTY
DAMAGE
,
PERSONAL
INJURY
OR
DEATH
,
DISCONNECT
ELECT RICAL
POWER
BEFORE
REMOVING
FILTERS
OR
PERFORMING
ANY
OTHER
MAINTENANCE
.N
EVER
OPERATE
FURNACE
WITHOUT
A
FILTER
INSTALLED
BECAUSE
DUST
AND
LINT
WILL
BUILD
UP
ON
INTERNAL
PARTS
RESULTING
IN
LOSS
OF
EFFICIENCY
,
EQUIPMEN T
DAMAGE
OR
POSSIBLE
FIRE
.
WARNING
A return air filter is not supplied with this furnace and can-
not be installed inside the cabinet; however, a means of
filtering all of the return air (intake) must be provided.
Your installer will supply filters at the time of installation.
Become familiar with filter location and procedures for re-
moving, cleaning and replacing them.
If you need assistance, contact the installer of your fur-
nace or another qualified servicer.
Filters must be inspected, cleaned or changed every two
months or as required. As a homeowner, it is your personal
responsibility to keep air filters clean. Remember that dirty
filters are the most common cause of inadequate heating
or cooling performance.
FILTER REMOVAL
Depending on the installation, differing filter arrangements
can be applied. Filters can be located in a central return
grille or a side panel external filter rack (upflow only). To
remove filters from an external filter rack, follow the di-
rections provided with external filter rack kit.