ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS
PROCEDURE
CAUTION:
Electrostatic discharge can affect electronic
components. Take precautions during furnace installation
and servicing to protect the furnace electronic control.
Precautions will prevent electrostatic discharges from
personnel and hand tools which are held during the
procedure. These precautions will help to avoid exposing
the control to electrostatic discharge by putting the
furnace, the control, and the person at the same electro-
static potential.
1. Disconnect all power to the furnace. DO NOT TOUCH
THE CONTROL OR
ANY
WIRE CONNECTED TO THE
CONTROL PRIOR TO DISCHARGING YOUR BODY’S
ELECTROSTATIC CHARGE TO GROUND.
2. Firmly touch a clean, unpainted, metal surface of the
furnace chassis which is close to the control. Tools held in
a person’s hand during grounding will be satisfactorily
discharged.
3. After touching the chassis you may proceed to service the
control or connecting wires as long as you do nothing that
recharges your body with static electricity (for example; DO
NOT move or shuffle your feet, DO NOT touch un-
grounded objects, etc.).
4. If you touch ungrounded objects (recharge your body with
static electricity), firmly touch furnace again before touch-
ing control or wires.
5. Use this procedure for installed and uninstalled (un-
grounded) furnaces.
6. Before removing a new control from its container, dis-
charge your body’s electrostatic charge to ground to protect
the control from damage. If the control is to be installed in
a furnace, follow items 1 through 5 before bringing the
control or yourself into contact with the furnace. Put all
used AND new controls into containers before touching
ungrounded objects.
7. An ESD service kit (available from commercial sources)
may also be used to prevent ESD damage.
CARE AND MAINTENANCE
For continuing high performance and to minimize possible equip-
ment failure, periodic maintenance must be performed on this
equipment. Consult your local dealer about proper frequency of
maintenance and the availability of a maintenance contract.
WARNING:
Never store anything on, near, or in contact
with the furnace, such as:
1. Spray or aerosol cans, rags, brooms, dust mops,
vacuum cleaners, or other cleaning tools.
2. Soap powders, bleaches, waxes or other cleaning
compounds, plastic or plastic containers, gasoline,
kerosene, cigarette lighter fluid, dry cleaning fluids, or
other volatile fluids.
3. Paint thinners and other painting compounds, paper
bags, or other paper products.
A failure to follow this warning could result in
corrosion of the heat exchanger, fire, personal injury,
or death.
WARNING:
Turn off the gas and electrical supplies to
the unit before performing any maintenance or service.
Follow the operating instructions on the label attached to
the furnace. A failure to follow this warning could result
in personal injury.
The minimum maintenance on this equipment is as follows:
1. Check and clean air filter each month or more frequently if
required. Replace if torn.
2. Check blower motor and wheel for cleanliness each heating
and cooling season. Clean as necessary.
3. Check electrical connections for tightness and controls for
proper operation each heating season. Service as necessary.
CAUTION:
Personal injury can result from sharp metal
edges, etc. Be careful when removing parts.
I. CLEANING AND/OR REPLACING AIR FILTER
The air filter arrangement may vary depending on the application.
NOTE:
If the filter has an airflow direction arrow, the arrow must
point towards the blower.
WARNING:
Never operate unit without a filter or with
filter access door removed. A failure to follow this
warning could result in fire, personal injury, or death.
To clean or replace filter, proceed as follows:
-Filters installed in media cabinet adjacent to furnace (See Fig. 3):
a. Turn off electrical supply to furnace before removing
filter access door.
b. Remove filter cabinet door.
c. Slide filter out of cabinet.
d. If equipped with permanent, washable filter, clean filter
by spraying cold tap water through filter in opposite
direction of airflow. Rinse filter and let dry. Oiling or
coating of the filter is not recommended.
e. If equipped with factory-specified disposable media
filter, replace only with media filter having the same part
number and size.
Fig. 2—Multipoise Orientation
A93041
UPFLOW
DOWNFLOW
HORIZONTAL
LEFT
AIRFLOW
AIRFLOW
AIRFLOW
AIRFLOW
HORIZONTAL
RIGHT
TABLE 1—FILTER SIZE INFORMATION (IN.)
FURNACE
CASING WIDTH
FILTER QUANTITY AND SIZE
FILTER
TYPE
Side Return
Bottom Return
17-1/2
(1) 16 X 25 X 1* (1) 16 X 25 X 1* Cleanable
*
Factory-provided with the furnace.
—2—
