IO-231
6/03
18
MOTOR LUBRICATION AND MAINTENANCE
The circulating air blower is equipped with bearings that are
permanently lubricated by the motor manufacturer and
require no additional lubrication. At the time of the monthly
filter inspection clean the exterior of the circulating air motor,
especially around the perimeter air holes to prevent the
possibility of overheating due to an accumulation of dust or
dirt on the windings and motor casing. As suggested
elsewhere in these instructions, the air filters are to be
kept clean. Dirty filters will restrict the airflow over the motor
windings and possibly cause an overheating condition. The
venter motor has bearings, which are prelubricated by the
motor manufacturer and require no attention.
SERVICE INSTRUCTIONS
•
DO
keep the circulating air filters clean. The heating
system will operate more efficiently and economically.
•
DO
arrange drapes and furniture so that the supply
air registers and return air grilles are unobstructed.
•
DO
close doors and windows. This will reduce the heat
load on the system.
•
DO
avoid excessive use of bathroom and kitchen
exhaust fans.
•
DO NOT
let heat generated by televisions, lamps,
direct sunlight, etc. influence the thermostat operation.
•
DO NOT
use the furnace room as a storage area.
•
DO NOT
store gasoline or other flammable liquids or
vapors in the vicinity of the furnace.
•
Exclusive of the mounting platform, keep all
combustible materials at least 3 feet from the Furnace.
SEQUENCE OF OPERATION
This appliance is controlled by the thermostat. Within this
section, the term lockout is referenced. This lockout is a
“soft” lockout, which will reset after one hour. It is the
obligation of the installer to educate the user on the proper
use of the thermostat and the sequence of operation in
both the heating and cooling modes. It is also important
that any repair or service be performed by a QUALIFIED
service person, not by the user.
Heating Mode
•
The furnace control checks for an open main limit (this
limit is normally closed). If the limit is open, the furnace
will remain inoperable until the limit is closed. During
an open limit the circulating air blower will be
energized. The status light will blink four (4) times.
•
The room thermostat reacts to a demand for heat.
•
The control will then check to insure that the vent
pressure switch is open. If, at this point, the vent
pressure switch is closed the control will blink two (2)
times and will remain inoperable until this situation is
corrected.
•
The venter blower is energized.
•
The vent pressure switch will close when it detects a
pressure in excess of its setting. If the pressure switch
fails to close the status light will flash three (3) times.
The sequence cannot continue until the pressure switch
closes.
•
After a pre-purge of about ten (10) seconds the electronic
ignition device will be energized.
•
After a slight delay the gas valve will open.
•
The burners will ignite and the flame sensor will detect
the presence of flame. The ignition device will
deenergize. If the sensor does not detect the burner
flame, the gas valve will close and the ignition cycle
will be repeated for a total of three attempts. If, after
the third attempt, the presence of flame is not detected,
the furnace will go into a lockout condition for one (1)
hour. It will then repeat the ignition cycle. This one (1)
hour lockout and retry will occur indefinitely.
•
Thirty (30) seconds after the main valve is energized
the circulating air blower will be activated.
•
The furnace will remain in operation until the demand
for heat is satisfied.
•
Once the demand is satisfied the venter will shut off,
and the circulating air blower will shut off after the field
selectable time off is attained.
•
The furnace will remain dormant until the next demand
for heat.
Cooling Mode
•
The control checks for an open limit. If an open limit is
detected the furnace will remain inoperable until the
condition is corrected. During an open limit condition
the circulating air blower will be energized. The status
light will blink four (4) times.
•
A demand for cooling is initiated.
•
The condenser contactor will close.
•
After approximately five (5) seconds the circulating air
blower will start on the cooling speed.
•
After the room thermostat is satisfied the condenser
contactor will open.
•
The circulating air blower will remain in operation for
approximately forty-five (45) seconds.
REMOVING AN EXISTING APPLIANCE
When replacing an existing appliance, the resulting
installation must comply with all local codes, or in the
absence of local codes, to the National Fuel Gas Codes
ANSI Z223.1 and/or CAN/CGA B149 Installation Codes
as well as these installation instructions.
If the installation of this GMNTE furnace requires that an
existing appliance be removed from a venting system,
which still serves another gas, fired appliance this may
require that the existing vent be re-sized. The following
steps shall be performed with each appliance connected
to the venting system placed in operation while any other
appliance connected to the venting system are not in
operation;