6
T
o Operate the Indoor Blower Continuously —Set the
thermostat fan switch to ON (may be called CONT on some
thermostat models). (See Figure 1)
The indoor blower will start immediately, and will run
continually until the fan switch is reset to AUTO.
The continuous indoor blower operation can be obtained
with the thermostat system switch set in any position,
including OFF.
The continuous indoor blower operation is typically used to
circulate the indoor air to equalize a temperature unbalance
due to a solar load, cooking, or fireplace operation.
SYSTEM MAINTENANCE
!
CAUTION:
Be certain the electrical power to the unit is
disconnected and the gas is shut off before doing
the following recommended maintenance.
Proper maintenance is most important to achieve the best
performance from the appliance and should be performed by
a qualified service technician at least once a year. Follow the
maintenance schedule and the instructions below for years
of safe, trouble free operation.
•
Do not place combustible materials on or against
the cabinet.
•
Do not store gasoline or any other flammable
vapors and liquids in the vicinity of the unit.
•
Annually inspect the physical support of the unit
to ensure that it is physically sound without sag-
ging, cracks, gaps, etc., around the base so as to
provide a seal between the support and the base.
•
Annually inspect the return-air connection to
ensure that it is physically sound and is still
sealed to the casing of the unit.
•
Annually inspect the unit, ductwork, and vent
system for signs of physical deterioration.
•
Always replace the doors on the unit after servicing.
Do not operate the unit without all doors and
covers in place.
!
CAUTION:
Do not strike any of the internal electrical
components while cleaning.
1. Regular Cleaning:
•
Remove any debris from the outdoor coil, being
careful not to damage the aluminum fins.
•
Check for and remove any obstructions to condenser
airflow.
•
Clean the blower compartment regularly during the
heating and cooling seasons to remove any dust
that may have accumulated in the compartment or
on the blower and motor. Buildup of dust on the
blower and motor can create excessive loads on the
motor resulting in higher than normal operating
temperatures and possible shortened service life.
2. Air Filters:
!
WARNING:
Never operate the unit without a filter in the return
air system. Dust and lint in the return air can build
up on the internal components, resulting in a loss
of efficiency, equipment damage, and possible
fire risk.
G
R4G(M,N) units are factory equipped with pleated 2”
disposable filters. The filters should be checked periodi-
cally and replaced (or cleaned) when necessary with filters
of the same dimensional size. Replace using disposable
filters with a minimum airflow rating of 500 FPM or
permanent filters only. For 7.5 and 10 ton models only: the
filter rack is field adjustable to accommodate 1” permanent
filters. DO NOT use 1” disposable filters in GR4G(M,N)-
090/120 units.
NOTE: Filters must be ULC approved or equivalent for use
in Canada.
Always replace the filter access panels after changing
or cleaning the filters. Do not operate unit without the
filter access panels in place.
3. Motor Lubrication:
!
WARNING:
Lubrication of the motors in this unit is not
required. Do not lubricate any motor in this
product.
