Carrier CENTRAL AIR CONDITIONER User manual

CENTRAL AIR CONDITIONER
A GUIDETO OPERATING AND MAINTAININGYOUR RESIDENTIAL AIR CONDITIONING UNIT.
NOTETO INSTALLER:THIS MANUAL SHOULD BE LEFT WITHTHE EQUIPMENT USER.

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WELCOMETO EFFICIENT HOME
COOLING COMFORT
Congratulations on your excellent choice and sound investment
in home cooling comfort!
Your new air conditioning unit represents both the latest in engi-
neering 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 depend-
ability, spend just a few minutes with this booklet now. Learn
abouttheoperationofyourairconditioner,andthesmallamount
of maintenance it takes to keep it operating at its peak efficiency.
With minimal care, your new air conditioner will provide you
and your family with cool comfort — both now and for years to
come.
YOUR COMFORT SYSTEM
IdentifyingYour System
Takethetimetofamiliarizeyourselfwiththetypeofsystemyou
have. This knowledge will be of use in understanding the basic
operation of your new air conditioner.
The split-system type has an indoor and an outdoor unit,each of
which contains a coil. These units are interconnected by refrig-
erant tubes. (See Fig. 1.)
Each unit has a rating plate affixed to it which provides
necessary information for specific identification of a unit.You
should familiarize yourself with the product, model, and serial
numbers listed on each rating plate. Record them for future ref-
erence on the last page of this booklet.
IMPORTANT FACTS
To better protect your investment and to eliminate unnecessary
service calls, familiarize yourself with the following facts:
• Your air conditioning system should never be operated without
a clean air filter properly installed. Plan to inspect the filter peri-
odically. A clogged air filter will increase operating costs and
shorten the life of the unit.
WARNING
Improper installation, adjustment, alteration, ser-
vice, maintenance, or use can cause explosion,
fire, electrical shock, or other conditions which
may cause personal injury or property damage.
Consult a qualified installer, service agency, or
your distributor or branch for information or as-
sistance. The qualified installer or agency must
use factory-authorized kits or accessories when
modifying this product.
WARNING
To prevent personal injury, death, or property
damage, read and follow all instructions and
warnings, including labels shipped with or at-
tached to the unit before operating your new air
conditioner.
!
!
Fig.1 —Typical Split-System
Installation
• Supply-air and return-air registers should not be blocked.
Drapes, furniture, and toys are some of the items commonly
found obstructing registers. Restricted airflow lessens the unit’s
efficiency and life span.
• The outdoor unit must have unrestricted airflow. Do not cover
theunit,leananythingagainst it, or stand on it. Donotallowgrass
clippings, leaves, or other debris to accumulate around or on top
of the unit. Maintain a 12-in. minimum clearance between the
outdoor unit and tall grass, vines, shrubs, etc.
• Your multipurpose indoor thermostat is the control center for
your air conditioning system.You should familiarize yourself
with its proper operation.Attempting to control the system by
other means — for instance, switching the electrical supply pow-
er ON and OFF — may cause damage to the unit.
• Thermostat “jiggling” causes rapid-cycling, which is potential-
ly 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.
• You may find that you can maintain greater personal comfort
by running the fan continuously. “Air pockets” can form due to
the structure of the house, placement of registers, etc. These air
pockets may be too cool or warm for your liking. Continuous fan
operation minimizes any temperature differences.Also, systems
equipped with electronic or mechanical air cleaners and/or
humidifiersoffertheaddedbenefitsofhavingtheair continuously
cleaned year-round, and humidified during the winter season.
• A system equipped with a heat or energy recovery ventilator
offers the advantage of exhausting stale air from the home and
allowing fresh air in from the outdoors while minimizing heat
loss.
• Yoursystemmayalsobeequippedwithazoning system which
allows individual control over the temperatures of separate areas
of your home.
• Yourairconditioner removeshumidityfromyour homeduring
the cooling season.After a few minutes of operation, you should
be able to see water trickle from the condensate drain of the cool-
ingcoil. Check this occasionally to be surethe drain system is not
clogged. Of course, don’t expect to see much drainage if you live
in a very dry environment.
• Do not operate your unit when outdoor temperatures are below
55
° F.
®

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OPERATINGYOUR 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
thermostats have 3 controls: a temperature control selector, a
FAN control, and a SYSTEM or MODE control.
The temperature control selector is a dial, lever, or set of buttons
that allows you to establish the degree of temperature you wish
to maintain for your personal comfort. Some thermostats pos-
sess 2 temperature control selectors: 1 for setting the tempera-
ture desired for cooling operation, and 1 for setting the
temperature desired for heating operation. Typical settings are
78
° F for cooling and 68 ° F for heating.
The FAN control offers 2 options for controlling the indoor
blower: AUTO and ON. When set to AUTO, the blower runs
only while the thermostat operates the cooling or heating equip-
ment. When set to ON, the blower runs continuously — regard-
less of whether the cooling or heating equipment is operating.
Typically, the SYSTEM or MODE control on your thermostat
offers the following selections: COOL, OFF, and HEAT.Your
thermostat may also have a fourth selection,AUTO. Neither the
cooling nor heating equipment will operate when the SYSTEM
or MODE control is set to OFF. With the SYSTEM or MODE
control set to COOL, your air conditioner will operate when the
indoor temperature rises above the level that you wish to main-
tain.WiththeSYSTEMorMODE controlsettoHEAT, theheat-
ingunitofyourhomecomfortsystemwilloperateautomatically
Fig. 2 — Carrier Non-ProgrammableThermostat
MODE
FAN
RESET/FILTER
RESET FILTER BUTTON
RESTARTS THE TIMER
THAT CALCULATES
THE NEXT AIR FILTER
CHANGE OR CLEANING
FAN BUTTON CHOOSES
BETWEEN ON OR AUTO
FAN OPERATION
LCD READOUT DISPLAYS
CURRENT ROOM TEMPERATURE,
DESIRED ROOM TEMPERATURE,
UNIT MODE SETTING,
AND FAN MODE SETTING.
MODE BUTTON SELECTS
BETWEEN OFF, HEAT,
COOL, AND AUTO
OPERATION.
UP AND DOWN
BUTTONS INCREASE
OR DECREASE THE
DESIRED TEMPERATURE
SETTINGS.
Fig. 3 — Carrier ProgrammableThermostat
HOLDRESET FILTERSET TIME
FANEND PROGRAMCHANGE DAY
MODEPROGRAM
COPY PREVIOUS DAY
RESET FILTER BUTTON
RESTARTS THE TIMER
THAT CALCULATES
THE NEXT AIR FILTER
CHANGE OR CLEANING
HOLD BUTTON MAINTAINS
THE CURRENT TEMPERATURE
AND OVERRIDES PROGRAMMED
TEMPERATURE CHANGES
UNTIL RESET.
SET TIME
BUTTON FAN BUTTON CHOOSES
BETWEEN ON OR AUTO
FAN OPERATION
MODE BUTTON SELECTS
BETWEEN OFF, HEAT,
COOL, AND AUTO
OPERATION.
PROGRAM BUTTONS
FOR PROGRAMMING
HEATING/COOLING
CYCLES.
UP AND DOWN
BUTTONS INCREASE
OR DECREASE THE
DESIRED TEMPERATURE
SETTINGS.
LCD READOUT DISPLAYS
CURRENT ROOM TEMPERATURE,
DESIRED ROOM TEMPERATURE
OR OUTDOOR TEMPERATURE,
UNIT MODE SETTING,
FAN MODE SETTING,
AND TIME OF DAY.

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when the indoor temperature falls below the level that you have
selected.
The AUTO selection found on some thermostats provides for
automaticchangeoverbetweencoolingandheatingequipment
operation.With the SYSTEM or MODE control set toAUTO,
your air conditioner will operate when the indoor temperature
rises above the thermostat cooling temperature setting, or the
heatingsectionwilloperatewhentheindoortemperaturedrops
below the thermostat setting for the heating cycle.
Your thermostat may be PROGRAMMABLE or NON-PRO-
GRAMMABLE.ANON-PROGRAMMABLEthermostatdoes
not allow the temperature settings to be varied throughout the
day or week without physically changing the settings.A PRO-
GRAMMABLE thermostat allows various daily temperature
changes to be preset. During the winter, for example, you may
wish to “set back” the temperature of your home at night, then
have the temperature return to normal prior to waking up. The
home’s temperature can then be lowered again during the day
whennooneis athome,butagain be at peak comfort level when
your family returns home. During the summer, the opposite
changes might be programmed. When properly used, the pro-
gramming can result in energy savings on your home’s heating
and cooling.
COOLING MODE
Whenoperatingincoolingmode,yourairconditionerrunsuntil
theindoor temperature is loweredtothe levelyou have selected.
Onextremelyhotdays,yourconditionerwillrunforlongerperi-
ods at a time and have shorter “off” periods than on moderate
days.
The following are typical conditions that add extra heat and/or
humiditytoyourhomeandforceyourcoolingunittowork long-
er to keep your home comfortable:
• Entrance doors are frequently opened and closed
• Laundry appliances are being operated
• A shower is running
• More than the usual number of people are present in the
home
• More than the normal number of electric lights are in use
• Drapes are open on the sunny side of the home
HEATING MODE
With the SYSTEM or MODE control of your indoor thermo-
stat set to HEAT, the heating unit of your home comfort sys-
tem operates 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
cooler days and nights than on moderate ones.
Refer to your heating unit User’s Manual for specific informa-
tion on heating operation.
PERFORMING ROUTINE
MAINTENANCE
Withthepropermaintenanceandcare,yourairconditioningunit
will operate economically and dependably. Maintenance can be
accomplished easily by referring to the following directions.
However, before performing maintenance, consider these
important safety precautions:
• DISCONNECTALL ELECTRICAL POWER TO THE
INDOORAIR HANDLER OR FURNACE BEFORE REMOV-
INGACCESS PANELS OR PERFORMINGANY MAINTE-
NANCE. Disconnect power to both the indoor and outdoor units.
NOTE: THERE MAY BE MORETHAN 1 ELECTRICAL DIS-
CONNECT 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.
CHECKTHE AIR FILTER
A dirty air filter will cause excessive strain on the compressor
and blower motor.This can cause these components to overheat
and automatically shut down. In the worst case, these compo-
nents will fail and need to be replaced. To avoid inefficient or
failedoperationofyourunit,CHECKTHEFILTER(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,permanentfiltersshouldbewashedinasolutionofcold
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 allows you to rotate between the 2 with minimal downtime
foryourcomfortsystem.Extrafiltersmaybepurchasedfromyour
dealer.
There are no filters in the outdoor unit of a split-system. If your
indoor unit is a gas or oil furnace, refer to your furnace User’s
Manual for filter location and procedures for replacement or
cleaning.
If your system includes an indoor fan coil unit, the filter may be
located in the unit where it connects with the return-air duct or
plenum. (See Fig. 5.) Remove the filter cover plate by sliding
latches toward center of plate. Lift filter to clear lower flange. Fil-
ter is spring-loaded and will “pop out.” Reinstall filter, being cer-
tain to secure filter behind lower flange. When reinstalling cover
plate, secure plate behind upper flange then slide tabs outward.
Theindoorfancoilunitmaybelocatedintheattic.Inthisinstance
the filter could be located behind the return air grille. Access the
filter by removing 2 screws from return air grille.
Fig. 4 — Main Electrical Disconnect
MAIN
ON
OFF

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If your system includes an electronic air cleaner, refer to air
cleaner user’s manual for proper filter cleaning or replacement.
INDOOR COIL
If the split-system coil has only been operated with a clean filter
in place, it should require minimal cleaning.
If coil cleaning is required, call your dealer for service. It may be
necessary to clean the coil with a detergent solution and rinse it
with water. This could require the removal of the coil.You should
not attempt this yourself.
OUTDOOR COIL
If grass clippings, leaves, shrubbery, and debris are kept away from
the outdoor unit, minimal care should be sufficient to keep the sys-
tem functioning properly. For proper drainage, debris must be
removed periodically from the base pan. However, if the outdoor
coilbecomesdirty,useavacuumcleanerwithsoftbrushattachment
to clean the exterior surface.Vacuum coil surface using an up and
down motion. Be careful not to bend or damage coil fins.
Ifdirtisdeepinthecoil,contactyourdealerforservice.Theoutdoor
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.
OUTDOOR COIL — SEA COAST
If your unit is located near the ocean, special maintenance is
required. Ocean mist/breeze carries salt, which is corrosive to
most metals.Although your new unit is made out of galvanized
metal and is protected by top-grade paint, you should take the
precaution of additional maintenance which consists of period-
icallywashingtheunit.Bywashingallexposedsurfacesandcoil
approximatelyevery3months,youwillbeaddingadditionallife
to your unit. Consult your installing contractor for proper inter-
vals/procedures for your geographic area or service contact.
UNIT SUPPORT
Your split-system outdoor unit should be maintained in a level
position. If its support should shift or settle so that the unit is no
longerlevel,youshould correctthecondition.Relevelitprompt-
ly to assure that water drains 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.
BEFOREYOU REQUEST A
“SERVICE CALL”
CHECK FORTHESE 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 accu-
mulations of dirt. Check for blocked return-air or supply-air reg-
isters. Be sure registers are open and unobstructed.
• Check the settings on your indoor thermostat. If you desire
cooling, make sure that the temperature control selector is set
below room temperature and the SYSTEM or MODE control is
set to COOL orAUTO. If you require warmth, make sure that the
temperature control selector is set above room temperature and
the SYSTEM or MODE control is set to HEAT orAUTO. The
FAN controlshouldbesettoONforcontinuousbloweroperation
orAUTOifyou wish blowertofunctiononlywhiletheheatingor
cooling equipment is operating.
If your comfort system still fails to operate, turn your system off
and contact your servicing 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 the last page of this booklet.)With this information,
your dealer may be able to offer helpful suggestions over the
phoneorsavevaluabletimethroughknowledgeablepreparation
for the service call.
REGULAR DEALER MAINTENANCE
In addition to the routine mainte-
nance that you perform, your
home comfort system should be
inspectedregularlybyaproperly
trained service technician. The
inspection(preferablyeachyear,
but at least every other year)
should include the following:
• Routine inspection of air filter(s).
Replacement or cleaning as required.
• Inspection and cleaning of the blower wheel, housing, and
motor.
• Inspection and, if required, cleaning of indoor and outdoor
coils.
• Inspection of the indoor coil drain pan, plus the primary and
secondary drain lines. If supplied, the auxiliary drain pan and
line should be inspected at this time. 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 air conditioning system to deter-
mine actual working condition. Necessary repair and/or
adjustment should be performed at this time.
Yourservicingdealermayofferaneconomicalservicecontract
that covers seasonal inspections. Ask for further details.
Fig. 5 — Removing Filter from
Fan Coil Unit

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FORTHE RECORD
Record the model, product, and serial numbers of your new
equipment in the spaces provided. This information, along with
the other ready-reference facts requested, will be necessary
should you ever require information or service.

7

TO OBTAIN INFORMATION ON PARTS: Consult your installing dealer or the classified section of your local telephone directory under the
“Heating Equipment’’ or “Air Conditioning Contractors & Systems’’heading for dealer listing by brand name.
Have available the Model No., Series Letter, & Serial No. of your equipment to ensure correct replacement part.
Carrier Corporation Indianapolis, IN 46231
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations .
Copyright 1997 Carrier Corporation Form: OM38-39 Replaces: OM38-29/OM38-30 Printed in the U.S.A. 9-97 PC 101 Catalog No.563-842
INSTALLATION DATA
Date Installed
Dealer Name
Address
City
State Zip
Telephone
SPLIT-SYSTEM
OUTDOOR UNIT:
Product No.
Model No.
Serial No.
INDOOR UNIT OR COIL:
Product No.
Model No.
Serial No.
MODULAR INDOOR UNIT, if Applicable:
Blower—Product No.
Model No.
Serial No.
Coil—Product No.
Model No.
Serial No.
Heater—Product No.
Model No.
Serial No.
ACCESSORIES
Product No.
Product No.
Product No.
Product No.
Product No.