Unit Support; Installation Data - Carrier 50ZH Manual To Operating And Maintaining

CHECK THE AIR FILTER
A dirty air filter will cause excessive strain on the compres-
sor and blower motor. This can cause the components to
overheat and automatically shut down. In the extreme, the
components will fail and need to be replaced. To avoid
inefficient or failed operation of your unit, CHECK THE
FILTER(S) EVERY 3 TO 4 WEEKS. Replace filter(s) when
necessary, or clean the filter(s) if you have the reusable type.
Disposable filters should be replaced by similar, new filters
of the same dimensions.
Reusable, permanent filters should be washed in a solution
of cold water and mild detergent, then rinsed and thoroughly
dried. THE FILTER MUST BE COMPLETELY DRY
BEFORE BEING REINSTALLED. To avoid prolonged
shutdown of your unit while a filter is drying, you should
have an extra filter on hand. This would allow you to rotate
between the two with minimal downtime for your comfort
system. Extra filters may be purchased from your dealer.
The filter(s) and filter rack for a packaged system are sup-
plied and installed by the contractor or dealer. Typically, the
filter(s) and rack are located in the return-air duct at the out-
door unit or behind the return-air grille(s). Have your dealer
show you the location of your filter(s) and the procedures
for removal and replacement.
If you have any questions about the removal and/or cleaning
of your filter(s), contact your dealer for assistance.
If grass clippings, leaves, shrubbery, and debris are kept away
from the unit, minimal care should be sufficient to keep the
system functioning properly. However, if the outdoor coil
becomes dirty, use a brush or vacuum cleaner and soft brush
attachment to clean the exterior surface. If dirt is trapped
deep in the coil, contact your dealer for service.

UNIT SUPPORT

Your packaged unit should be maintained at a level position.
If its support should shift or settle so that the unit is no longer
level, you should correct the condition. Relevel it promptly
to assure condensate drainage out of the unit. If you notice
that water or ice collects beneath the unit, arrange for it to
be drained away from the unit.
BEFORE YOU REQUEST A SERVICE CALL
BEFORE YOU CALL FOR SERVICE, CHECK FOR
THESE EASILY SOLVED PROBLEMS:
Check the indoor and outdoor disconnect switches. Verify
that circuit breakers are ON or that fuses have not blown.
Check for sufficient airflow. Check the air filter(s) for any
accumulations of dirt. Check for blocked return-air or supply-
air grilles. Be sure grilles are open and unobstructed.
Check the settings on your indoor thermostat. If you desire
cooling, see that the temperature control selector is set be-
low room temperature and the SYSTEM switch is on the
COOL or AUTO position. If you require warmth, be sure the
temperature control selector is set above room temperature
and the SYSTEM switch is at HEAT or AUTO. The FAN
switch should be set at ON for continuous blower operation
or AUTO if you wish the blower to function only while the
unit is operating.
If your comfort system still fails to operate, contact your ser-
vicing dealer for troubleshooting and repairs. Specify your
apparent problem, and state the model and serial numbers
of your equipment. (You should have them recorded on this
page.) With this information, your dealer may be able to
offer helpful suggestions over the phone, or save valuable
time through knowledgeable preparation for the service call.
REGULAR DEALER MAINTENANCE
In addition to the routine maintenance that you perform, your
home comfort system should be inspected regularly by a prop-
erly trained service technician. The inspection (preferably
each year, but at least every other year) should include the
following:
• Routine inspection if air filter(s). Replacement or cleaning
as required.
• Inspection and cleaning of the blower wheel, housing, and
motor. Service should include proper lubrication of these com-
ponents.
• Inspection and, if required, cleaning of indoor and out-
door coils.
• Inspection of the indoor coil drain pan, plus the drain line.
Service should include cleaning if required.
• A check of all electrical wiring and connections.
• A check for secure physical connections of individual com-
ponents within units.
• Operational check of the system to determine actual work-
ing condition. Necessary repair and/or adjustment should be
performed at this time.
WARRANTIES
The warranty is located at the back of this book. Be sure to
read the warranty carefully to determine the coverage for
your unit.
FOR THE RECORD
Record the model, product, and serial numbers of your
new equipment in the spaces provided below. This informa-
tion, along with the other ready-reference facts requested
below, will be necessary should you ever require informa-
tion or service.

Installation Data

Date Installed
Dealer Name
Address
City
State
Telephone
Product No.
Model No.
Serial No.
Heater, if applicable:
Part No.
Kilowatt Rating
4
Zip
Unit Data