Maintenance; Annual Inspection; Filters; Filter Maintenance - Intertek MES80 Installation Instructions Manual

Filters

T
O AVOID PROPERTY DAMAGE
DISCONNECT ELECTRICAL POWER BEFORE REMOVING FILTERS
OPERATE FURNACE WITHOUT A FILTER INSTALLED BECAUSE DUST AND
LINT WILL BUILD UP ON INTERNAL PARTS RESULTING IN LOSS OF
,
EFFICIENCY EQUIPMENT DAMAGE AND POSSIBLE FIRE
A return air filter is not supplied with this furnace; however,
there must be a means of filtering all of the return air. The
installer will supply filter(s) at the time of installation.

Filter Maintenance

Improper filter maintenance is the most common cause of
inadequate heating or cooling performance. Filters should
be cleaned (permanent) or replaced (disposable) every
two months or as required. When replacing filter, it must be
replaced with a filter of the same type and size.
Become familiar with filter location and procedures for removal,
cleaning and replacing them. If help is needed, contact the
installer of the furnace or a qualified servicer.

Filter Removal

HIGH VOLTAGE!
T
O PREVENT PROPERTY DAMAGE
DEATH DUE TO ELECTRICAL SHOCK
ELECTRICAL POWER TO THE FURNACE
REMOVING THE FILTER OR PERFORMING ANY OTHER
.

MAINTENANCE

Depending on the installation, differing filter arrangements
can be applied. Filters can be installed in either the central
return register or a side panel external filter rack (upflow
only). A media air filter or electronic air cleaner can be
used as an alternate filter. Follow the filter sizes given in
the Recommended Minimum Filter size table or instruction
provided by the media or electronic air cleaner manufacturer
to ensure proper unit performance.
To remove filters from an external filter rack in an upright upflow
installation, follow the directions provided with external filter
rack kit. For further details, see your distributor.

Horizontal Unit Filter Removal

Filters in horizontal installations are located in the central
return register or the ductwork near the furnace.
To remove:
1. Turn OFF electrical power to the furnace.
2. Remove filter(s) from the central return register or
ductwork.
3. Replace filter(s) by reversing the procedure for removal.
4. Turn ON electrical power to the furnace.
WARNING
, ,
PERSONAL INJURY OR DEATH
. N
.
WARNING
,
PERSONAL INJURY OR
,
DISCONNECT
BEFORE
Induced Draft and Circulator Blower
Motors
The bearings in the induced draft blower and circulator blower
motors are permanently lubricated by the manufacturer. No
EVER
further lubrication is required. Check motor windings for
accumulation of dust which may cause overheating. Clean
as necessary.

Flame Sensor (Qualified Servicer Only)

Under some conditions, the fuel or air supply can create a
nearly invisible coating on the flame sensor. This coating acts
as an insulator causing a drop in the flame sense signal. If the
flame sense signal drops too low the furnace will not sense
flame and will lock out. The flame sensor should be carefully
cleaned by a qualified servicer using steel wool. The flame
sense signal should be 1 to 3 microamps.

Igniter (Qualified Servicer Only)

At room temperature, the igniter ohm reading should be from
20 - 100 ohms.
Burner
T
O PREVENT PERSONAL INJURY OR DEATH
INTERNAL COMPARTMENT COVERS OR ATTEMPT ANY ADJUSTMENT
E
LECTRICAL COMPONENTS ARE CONTAINED IN BOTH COMPARTMENTS
C
ONTACT A QUALIFIED SERVICE AGENT AT ONCE IF AN ABNORMAL
OPERATION SHOULD DEVELOP
The Ultra low NOx furnace uses a premix burner. The burner
box is sealed to achieve safe and reliable operation.

Cleaning (Qualified Servicer Only)

1. Shut off electric power and gas supply to the furnace.
2. Disconnect the rollout limit wires, flame sensor wire,
and disconnect the igniter plug.
L
ABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING
. W
CONTROLS IRING ERRORS CAN CAUSE IMPROPER AND DANGEROUS
. V
OPERATION
3. Do not remove burner or other components.
4. Clean cabinet and around the inducer blower, moter
and burner box.
5. Reconnect wiring.
6. Turn on electric power and gas supply to the furnace.
7. Check furnace for proper operation. Refer to
"Operational Checks" section to verify burner flame
characteristics.
27
WARNING
,
DO NOT REMOVE ANY
.
CAUTION
ERIFY PROPER OPERATION AFTER SERVICING
.
.
.