Carrier 50GS036300, 50GS042300, 50GX060300, 50GX048300, 50GX042300 Owner’s Manual

HgATUNG & COOLING

Single-Packaged Electric Cooling Units

\isitx__ _.carrbr.com

A Guide To Operating and Maintaining Your

Single-Package Electric Cooling Unit

NOTE TO INSTALLER

This nmnuaI should be left with the equipment owner

FOR YOUR SAFETY

Do not store or use gasoline or other flamnmble vapors and

liquids in the vicinity of this or any other appliance,

Do not use this unit if any part has been under water

Immediately call a qualified selwice technician to inspect d_e
unit and to replace any part of the control system which has
been under water. Failure to fbllow this warning could result

in electrical shock, fire, personal inju V, or death.

50GS,GX

Befi_re per_bt_ning recommended maintenance, be sure the

main pox_ er switch to unit is turned off. Electric shock could

cause personal injury or death.

TO START UNIT

Step l--Turn on the electrical power supply to unit,

Step 2--Select temperature and set system switch to de-
sired mode.

TO SHUT UNIT OFF

If unit is being shut down because of a nmlfunction, call your
dealer as soon as possible.

Step l--Set temperature switch to OFF,

Step 2--Turn off the electrical power supply to unit,

ROUTINE MAINTENANCE

All routine nmintenance should be handled by skilled, experienced

personnel. Your dealer can help you establish a standard proce°

dnre
For your safety, keep the unit area clear and free of combustible

materials, gasolin< and other flamnmble liquids and vapors.
To assure proper functioning of the unit, flow of condenser air

must not be obst_lcted fiom reaching the unit. Clearance of at least
48 in. is required fiom top of unit and on sides except the power
entry side (42 in. clearance) and the duct side (12 in. naininmm
clearance).

MAINTENANCE AND CARE FOR THE EQUIPMENT

OWNER

Before proceeding vdth those things you might want to maintain

yourselL please careffilly consider the follm_ing:

Fig. 1--Unit

1, TURN OFF ELECTRI(AL POWER TO YOUR UNIT

BEFORE SERVICING OR PERFORMING MAINTE-

NAN(E

2. When removing access panels or per_brming maintenance
functions inside your unit, be aware of" sharp sheet metal

parts and screws. Although special care is taken to reduce

sharp edges to a n_ininmm, be extremely careful when
handling parts or reaching into the unit.

AIR FILTERS Air filter(s) should be checked at least every 3
or 4 weeks and changed or cleaned whenever it becomes dirty.
Dirty filters produce excessive stress on the blower motor and can

cause the motor to overheat and shut down. Table 1 indicates the
cot_'ect filter size for your unit. Refer to Fig 2 to access the

filter(s)
To replace or inspect filter(s) (or accessory filter rack when

supplied):

1 Remove the filter access panel using a 5/16=in nut driver
2 Remove the filter(s) by pulling the filter(s) out of the unit If

the filter(s) is dirty, clean or replace with new one

When installing the new filter(s), note the direction of the airflow
arrows on the filter _?ame.

If you have di[Iiculty in locating your air filter(s), or if you have
questions concerning proper filter maintenance, contact your
dealer fbr instructions. When replacing filters, always use the same
size and type of filter that was supplied originally by the installer.

50GX

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

PC 101 Catalog No 535-00083 Printed in U.S.A. Form OM50-35 Pg 1 1-03 Replaces: OM50-27

ACCESS PANEL

FILTER ACCESS
PANEL*

*For accessory fitter rack.

Fig.

2--Filter Access Panel--Vertical Supply

Shown

TaNe I--Indoor-Air Filter Data

UNIT SBZE FILTER SBZE
80GS018-030 20x20
80GS036-042 20x24
80GS048-060 24x30

80GX024-030 20x20

50GX038 20x24

80GX042-060 24x30

Never operate your unit without filters in place. Failure to

heed this warning may result in damage to the blower motor
and/or compressor An accunlt_lation of dust and lint on
internal parts of your unit can cause toss of ei_ciency and, in

sonle cases, fire

FANS AND FAN MOTOR Periodically check the condition of

ihn wheels and housings and fan-motor shaft bearings. No tubri=
cation of condenser- or evaporator-ihn bearings or motors is

required or recommended.
EVAPORATOR AND CONDENSER COILS Cleaning of the

coils should only be done by qualified service personnel. Contact

your dealer for the required annual maintenance.

CONDENSATE DRAIN The drain pan and condensate drain
line should be checked and cleaned at tlte same time the cooling

coils are checked by your dealer.
(OMPRESSOR All compressors are £_ctory-shipped with a

normal charge of the correct type refi'igeration grade oil in them

and should rarely require additional oil.
( ONDENSER FAN

The _i_n nlust be kept flee of all obstructions to ensure proper
cooling Contact your dealer for any required service.

ELECTRICAL (ONTROLS AND WIRING Electrical con=
trois are dif?:'icult to check without proper instrumentations; there-

fore, if there are any discrepancies in the operating cycle, contact
your dealer and request sela-ice.

REFRIGERANT (IR(UIT The reJ[i'igerant circuit is di_ticult
to check for leaks without the proper equipment: therefore, if
inadequate cooling is suspected, contact your local dealer for

service.

System under pressure. Relieve pressure and recover al!
re_figerant before system repair or final unit disposal to avoid
personal injury or death. Use all service ports and open all
flow-control devices, including solenoid valves.

UNIT PANELS After performing any maintenance or service
on the unik be sure all panels are fhstened securely in place to
prevent rain flora entering unit cabinet and to prevent disruption of
tile correct unit airflow pattern

REGULAR DEALER MAINTENANCE

In addition to the type of routine maintenance you might be willing
to perform, your unit should be inspected regularly by a properly
trained service technician An inspection (preferably each year, but
at least eve13_ other year) should include the following:

1. Inspection and, if required, cleaning of the condenser and
evaporator coils.

2. Inspection and, if required, cleaning of the evaporator &ain
pan

3. Inspection and cleaning of blower wheel housing and motor

4. Inspection of al! supply=air and return-air ducts for leaks,
obstn/ctions, and insulation integrity. Any problems found
should be resolved at this time

5. Inspection of the unit base to ensure that no cracks, gaps, etc.,
exist which may cause a hazardous condition.

6. Inspection of the unit casing fbr signs of deterioration

7. Inspection of all electrical wiring and components to assure
proper connection.

8. Inspection ibr leaks in the refrigerant circuit. Pressure-check
to determine appropriate reli'igerant charge

9. Inspection of compressor oil level by service person to ensure
proper oil level is maintained in the compressor when it is

installed and running.

10. Operational check of the unit to determine working condi=
tions. Repair or adjustment should be made at this time

Your selT"icing dealer may ott)r an economical service contract
that covers seasonal inspections. Ask for f_/rther details

Complete service instl_actions can be found in the unit Installation,
Start=Up and Service Instructions.