Carrier Air Conditioner 50SX User Manual

50SX  
Single-Packaged Cooling Units  
A Guide to Operating and  
Maintaining Your Cooling Unit  
NOTE TO INSTALLER:  
This manual should be left with the equipment  
owner.  
Before performing recommended maintenance, be sure  
main power switch to unti is turned off. Electrical shock  
could cause personal injury.  
Models 50SX Single Packaged Cooling Units Without Base Rail  
Models 50SX Single Packaged Cooling Units With Optional Base Rail  
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.  
Book 1 PC 101 Catalog No. 535-00089 Printed in U.S.A. Form OM50-38 Pg 1 1-03 Replaces: 50SS,SX-2SO  
Tab 1b 6b  
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• More than the usual number of people are present in the  
home  
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 over-  
heat and automatically shut down. In the extreme, the com-  
ponents 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.  
• More than the normal number of electric lights are in use  
• Drapes are open on the sunny side of the home  
HEATING CYCLE  
If you own a packaged air conditioner that includes electric  
heat as an accessory, you need only program your thermo-  
stat for heating.  
With the SYSTEM switch of your indoor thermostat set to  
the HEAT position, the heating section of your home com-  
fort system will operate until room temperature is raised to  
the level you have selected. Of course, the heating unit will  
have to operate for longer periods to maintain a comfortable  
environment on colder days and nights than on moderate ones.  
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 BE-  
FORE BEING REINSTALLED. To avoid prolonged shut-  
down of your unit while a filter is drying, you should have  
an extra filter on hand. This would allow you to rotate be-  
tween the two with minimal downtime for your comfort sys-  
tem. 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 deep in the  
coil, contact your dealer for service. The outdoor fan motor  
may have to be disconnected and the top panel removed to  
gain access to the coil for thorough cleaning. Do not attempt  
this yourself.  
PERFORMING ROUTINE MAINTENANCE  
With the proper maintenance and care, your air conditioner  
will operate economically and dependably. Maintenance can  
be accomplished easily by referring to the following direc-  
tions. However, before performing maintenance, consider these  
important safety precautions:  
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.  
• DISCONNECTALL ELECTRICAL POWER TO THE AIR  
CONDITIONER BEFORE REMOVING ACCESS PAN-  
ELS TO PERFORM SERVICE OR MAINTENANCE. For  
a packaged air conditioner unit, disconnect power to the unit  
and any supplemental electric heaters.  
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.  
NOTE: THERE MAY BE MORE THAN ONE ELECTRI-  
CAL DISCONNECT SWITCH.  
• ALTHOUGH SPECIAL CARE HAS BEEN TAKEN TO  
MINIMIZE SHARP EDGES IN THE CONSTRUCTION OF  
YOUR UNIT, BE EXTREMELY CAREFUL WHEN HAN-  
DLING PARTS OR REACHING INTO THE UNIT.  
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  
page 4 of this booklet.) 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.  
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REGULAR DEALER MAINTENANCE  
FOR THE RECORD  
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:  
Record the model, product and serial numbers of your new  
equipment in the spaces provided below. This information,  
along with the other ready-reference facts requested below,  
will be necessary should you ever require information or serv-  
ice.  
• Routine inspection of air filter(s). Replacement or clean-  
ing as required.  
Installation Data  
Date Installed  
• Inspection and cleaning of the blower wheel, housing, and  
motor. Service should include proper lubrication of these com-  
ponents.  
Dealer Name  
Address  
City  
• Inspection and, if required, cleaning of indoor and out-  
door coils.  
State  
Zip  
• Inspection of the indoor coil drain pan, plus the primary  
and secondary drain lines. Service should include cleaning  
if required.  
Telephone  
• A check of all electrical wiring and connections.  
Unit Data  
• A check for secure physical connections of individual com-  
ponents within units.  
Product No.  
Model No.  
• Operational check of the air conditioner system to deter-  
mine actual working condition. Necessary repair and/or ad-  
justment should be performed at this time.  
Serial No.  
Heater, if applicable:  
Part No.  
WARRANTIES  
Unit 50SX has a separate warranty located at the  
back of this book. Be sure to read the warranty care-  
fully to determine the coverage for your unit.  
Kilowatt Rating  
Copyright 2003 Carrier Corporation  
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.  
Book 1 PC 101 Catalog No. 535-00089 Printed in U.S.A. Form OM50-38 Pg 4 1-03 Replaces: 50SS,SX-2SO  
Tab 1b 6b  
4
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