Carrier 50SX User Manual
Single-Packaged CoolingUnits
A Guide to Operating and
Maintaining Your Cooling Unit
NOTE TO INSTALLER:
This manual should be left with the equipment
owner.
50SX
Before performing recommended maintenance, be sure
main powerswitch to unti is turned off. Electrical shock
could cause personal injury.
Models50SXSinglePackaged CoolingUnitsWithoutBaseRail
Models50SXSinglePackaged CoolingUnitsWithOptionalBaseRail
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
Tab 1b 6b
PC101CatalogNo.535-00089 PrintedinU.S.A.FormOM50-38 Pg11-03 Replaces:50SS,SX-2SO
WELCOME TO EFFICIENT
COOLING COMFORT
Congratulations on your excellent choice and sound investment in home cooling comfort!
Your new air conditioner represents both the latest in engineering development and the culmination of many years of
experience from one of the most reputable manufacturers of
comfort systems.
Your new unit is among the most energy-efficient and reliable air conditioning products available today. To assure its
dependability,spend just a few minutes with this booklet now.
Learn about the operation of your air conditioner and the
small amount of maintenance it takes to keep it operating at
its peak efficiency.
Withminimal care, your air conditionerwill provide you and
your family with satisfying home comfort — both now and
for years to come.
IMPORTANT FACTS
To better protect your investment and to eliminate unnecessary service calls, familiarize yourself with the following
facts:
Improper installation, adjustment, alteration,service,maintenance or use can causeexplosion, fire, electrical shock
or other conditions which may cause personal injury or
property damage. Refer to this manual. For assistance
or additional information consult a qualified installer,
service agency, distributor, or branch. The qualified installer or agency must use only factory authorized kits
or accessories when modifying this product.
• Y ourair conditioningsystem should neverbe operated without a clean air filter properly installed. Plan to inspect the
filter periodically.Aclogged air filter will increase operating
costs and shorten the life of the unit.
• Supply-air and return-air registers should not be blocked.
Drapes, furniture, and toys are some of the items commonly
found obstructing grilles.Restricted airflow lessens the unit’s
efficiency and life span.
• Outdoor unitsmust have unrestricted airflow.Do not cover
the unit, lean anything against it, or stand upon it. Do not
allow grass clippings, leaves, or other debris to accumulate
around or on top of the unit. Maintain a 12-in. minimum
clearance between the outdoorunit and tall grass,vines, shrubs,
et cetera.
• Your multipurpose indoor thermostat is the control center
for your airconditioning system. Youshould familiarize yourself with its proper operation. Attempting to control the system by other means — for instance, switching the electrical
supply power ON and OFF — may cause damage to the unit.
• Thermostat ‘‘jiggling’’ causes rapid-cycling, which is potentially damaging to the compressor. Do not move the temperature selector on the thermostat for any reason for at least
5 minutes after the compressor has shut off.
• Youmay find that you can maintain greater personal comfort by running the fan continuously. ‘‘Air pockets’’can form
due to the structure of the building, placement of registers,
et cetera. These air pockets may be too cool or warm for
your liking. Continuous fan operation minimizes any
temperature differences. Also, systems equipped with electronic air cleaners and/or humidifiers offer the added benefits of having the air continuously cleaned year-round, and
humidified during the winter season.
• Yourair conditioner will removehumidity from yourhome
during the cooling season. After a few minutes of operation,
you should be able to see water trickle from the condensate
drain of the cooling coil. Check this occasionally to be sure
the drain system is not clogged. Of course, don’t expect to
see much drainage if you live in a very dry environment.
OPERATING YOUR AIR CONDITIONER
The operation of your air conditioning system is controlled
by the indoor thermostat. You simply adjust the thermostat
and it maintains the indoor temperature at the level you select. Most thermostatsfor air conditioning systems have three
controls.These are the temperature controlselector,FANswitch,
and SYSTEM switch.
Thetemperaturecontrolselectorisadialor button(s) thatallow
you to establish the degree of temperature that you wish to
maintain for your personal comfort. Some thermostats possess two temperature control selectors: one for setting the
temperature desired during the cooling cycle, and one to set
the heating operation temperature (if the accessory electric
heater is used). Typical settings are 78 degrees Fahrenheit
for cooling and 68 degrees for heating.
The FANswitch offers two options for controlling the blower:
AUTO and ON.When set toAUTO, the blower will run during the time the air conditioner is operating. When the FAN
switch is set at the ON position, the blower will run continuously.
Typically,the SYSTEM switch on your thermostat offers the
following selections: COOL, OFF, and HEAT. Yourthermostat may also have a fourth selection, AUTO. The air conditioner will not operate when the SYSTEM switch is set at
the OFF position. With the SYSTEM switch set at COOL,
the cooling sectionof your comfort system willoperate when
the indoor temperature rises above the level that you wish to
maintain. With the SYSTEM switch set at the HEAT position, the accessory electric heater will operate automatically
whenever the indoor temperature falls below the level that
you have selected.
The AUTO selection found on some thermostats provides
for automatic changeoverbetween cooling and heating cycles.
Withthe SYSTEM switchset in theAUTO position, the cooling mode isactivated when the indoortemperature rises above
the thermostat cooling temperaturesetting, or the heatingmode
will be activated when the indoor temperature drops below
the thermostat setting for the heating cycle.
COOLING CYCLE
When operating in the cooling cycle, your air conditioner
will run until the indoor temperature is lowered to the level
you have selected. On extremely hot days, your air conditioner will run for longer periods at a time and have shorter
‘‘off’’ periods than on moderate days.
The following aretypical conditions thatadd extra heat and/or
humidity to yourhome.Your air conditionerwill work longer
to keep your home comfortable under these conditions:
• Entrance doors are frequently opened and closed
• Laundry appliances are being operated
• A shower is running
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