50GL---A
Single Packaged 50 Hz, CE Air Conditioner System
with Puron (R---410A) Refrigerant
7---14 kW (Sizes 24---48)
Owner’s Information Manual
A09042
Fig. 1 -- Unit 50GL--A
NOTE TO EQUIPMENT OWNER:
For your convenience, please record the model and serial numbers of your new equipment in the spaces
provided. This information, along with the installation data and dealer contact information, will be helpful
should your system require maintenance or service.
UNIT INFORMATION
INSTALLATION INFORMATION
Model # _____________________________________
Serial # ______________________________________
Date Installed ________________________________
DEALERSHIP CONTACT INFORMATION
Company Name_______________________________
Address______________________________________
_____________________________________________
Phone Number _______________________________
Technician Name _____________________________
_____________________________________________
ACCESSORIES (List type and model #)
_____________________________________________
_____________________________________________
_____________________________________________
NOTE TO INSTALLER:
This manual must be left with the equipment owner.
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the unit is 48 in. (1219 mm). Clearance of at least 36 in.(914 mm)
is required on sides except the power entry side (42 in. [1067 mm]
clearance) and the duct side (12 in. [305 mm] minimum clearance).
!
CAUTION
Maintenance and Care for the Equipment Owner
UNIT OPERATION HAZARD
Before proceeding with those things you might want to maintain
yourself, please carefully consider the following:
Failure to follow this caution may result in property damage.
Never operate your unit without filters in place. An
accumulation of dust and lint on internal parts of your unit can
cause loss of efficiency and blower motor and/or compressor
damage.
!
WARNING
FIRE, EXPLOSION, ELECTRICAL SHOCK AND
CUT HAZARD
Failure to follow this warning could result in personal injury,
death or property damage.
1. TURN OFF ELECTRICAL POWER TO YOUR UNIT
BEFORE
SERVICING
OR
PERFORMING
MAINTENANCE.
2. When removing access panels or performing 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 minimum, be extremely careful when
handling parts or reaching into the unit. Wear safety
glasses, glove, and appropriate protective clothing.
Filter Access
Panel For
Accessory Filter
Rach
Air Filters
Access Panels
The air filter(s) should be checked every 3 or 4 weeks and changed
or cleaned whenever it becomes dirty. Dirty filters produce exces-
sive stress on the blower motor and can cause the motor to overheat
and shut down.
A09380
Fig. 2 -- Accessory Filter Rack Access Panel
Fans and Fan Motors
This unit must have air filters in place before it can be operated.
These filters can be located in one of at least two places. In many ap-
plications, the installer will provide return air filter grilles mounted
on the wall or ceiling of the conditioned structure. In the instance of
filter grilles, the filters can simply be removed from the grille and re-
placed.
Periodically check the condition of fan wheels and housings and
fan--motor shaft bearings. Contact your dealer for the required
annual maintenance.
Indoor and Outdoor Coils
Cleaning of the coils should only be done by qualified service per-
sonnel. Contact your dealer for the required annual maintenance.
The other typical application is an accessory filter rack installed in-
side the unit itself. The following information is given to assist in
changing filters used in these internal filter racks.
Condensate Drain
The drain pan and condensate drain line should be checked and
cleaned at the same time the cooling coils are checked by your deal-
er.
Table 1 indicates the correct indoor filter size for your unit. Refer
to Fig. 2 to access filters installed in the accessory filterrack. Ifusing
an Accessory Filter Rack, refer to the Installation Instructions pro-
vided with it for correct filter sizes and quantities.
Compressor
All compressors arefactory shippedwith anormal chargeof thecor-
rect type of refrigeration grade oil. A compressor should rarely re-
quire additional oil.
Table 1—Indoor Air Filter Data
Unit Size
Filter Size in. (mm)
20x20x1 (508x508x25)
20x24x1 (508x610x25)
24x30x1 (610x762x25)
24x36x1 (610x914x25)
Condenser Fan
24
30
36
48
!
WARNING
PERSONAL INJURY AND UNIT DAMAGE HAZARD
To replace or inspect filters in accessory filter rack (See Fig. 2):
1. Remove the filter access panel using a 5/16--in. nut driver.
Failure to follow this warning could result in personal injury,
death or property damage.
Do not poke sticks, screwdrivers, or any other object into
revolving fan blades.
2. Removethefilter(s)by pulling itoutoftheunit.If thefilter(s)
is dirty, clean or replace with a new one.
The fan must be kept free of all obstructions to ensure proper cool-
ing. Contact your dealer for any required service.
When installing the new filter(s), note thedirection ofthe airflow ar-
rows on the filter frame.
Electrical Controls and Wiring
If you have difficulty locating your air filter(s) or have questions
concerning proper filter maintenance, contact your dealer for in-
structions. When replacing filters, always use the same size and type
of filter that was supplied originally by the installer.
Electrical controlsare difficultto checkwithout properinstrumenta-
tion. If there are any discrepancies in the operating cycle, contact
your local dealer and request service.
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Refrigerant Circuit
6. Inspection of the unit casing for signs of deterioration.
7. Inspection of all electrical wiring and components to assure
proper connection.
Therefrigerantcircuitisdifficulttocheckforleakswithout theprop-
er equipment. If inadequate cooling is suspected, contact your local
dealer for service.
8. Inspection for leaks in the refrigerant circuit. Pressure check
to determine appropriate refrigerant 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.
!
WARNING
EXPLOSION, BURN AND ENVIRONMENTAL
HAZARD
10. Operational check of the unit to determine working
conditions.Repairoradjustmentshouldbe madeat thistime.
Failure to follow this warning could result in personal injury,
death or property damage.
Your servicing dealer may offer an economical service contract that
covers seasonal inspections. Ask for further details.
System under pressure. Relieve pressure and recover all
refrigerant before system repair or final unit disposal. Use all
service ports and open all flow--control devices, including
solenoid valves.
Complete service instructions can be found in the unit Installation,
Start--up and Service Instructions.
Before you call for service...
...check for several easily--solved problems.
If insufficient heating or cooling is suspected:
Unit Panels
After performing any maintenance or service on the unit, be sure all
panels are fastened securely in place to prevent rain from entering
unit cabinet and to prevent disruption of the correct unit airflow pat-
tern.
( ) Check for sufficient airflow. Check the air filter for dirt. Check
for blocked return--air or supply--air grilles. Be sure they are open
and unobstructed. If these checks do not reveal the cause, call your
servicing dealer.
Regular Dealer Maintenance
If your unit is not operating at all, check the following list for
easy solutions:
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 every other year) should include the following:
(
) Check to be sure that the temperature specified by your User
Interface is set below the indoor temperature during the cooling sea-
son or above the indoor temperature during heating season. Be sure
the User Interface is set to COOL or HEAT and not OFF.
1. Inspection and, if required, cleaning of the outdoor and
indoor coils.
(
) If your unit still fails to operate, call your servicing dealer for
2. Inspection and, if required, cleaning of the indoor coil drain
pan.
troubleshooting and repairs. Specify the model and serial numbers
of your unit. (Record them in this manual in the space provided.) If
the dealer knows exactly which unit you have, he may be able to
offer suggestions over the phone, or save valuable time through
knowledgeable preparation for the service call.
3. Inspection and cleaning of blower wheelhousing andmotor.
4. Inspection of all supply--air and return--air ducts for leaks,
obstructions, and insulation integrity. Any problems found
should be resolved at this time.
In Case of Trouble
5. Inspectionof theunit baseto ensurethat nocracks, gaps,etc.,
exist which may cause a hazardous condition.
If you perform the steps above and unit performance is still unsatis-
factory, shut off the unit and call your dealer.
HEATING & COOLING
TO OBTAIN INFORMATION ON PARTS: Consult your installing dealer or 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.
Copyright 2009 Carrier Corporation
Printed in the U.S.A.
Edition Date: 06/09
Catalog No: OM50GL---C01
Manufacturer reserves the right to change, at any time, specifications and design without notice and without obligation.
R e p l a ce s: OM 5 0 --- C 1
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