50ES---A AND 50VLA
Comfort™ and Performance™ 13 and 14 SEER
Single Packaged Air Condiitoner System
With Puron (R---410A) Refrigerant
Single and Three Phase
2 --- 5 N om i n a l Ton s ( Si ze s 24 --- 60)
Owner’s Information Manual
A09034
A09033
50ES--A Without Economizer
50VL--A Without Economizer
A10078
50VL--A With Economizer
Fig. 2 -- Unit 50VL--A
A10077
50ES--A With Economizer
Fig. 1 -- Unit 50ES--A
1
Routine Maintenance
All routine maintenance should be handled by skilled, experienced
personnel. Your dealer can help you establish a standard procedure.
!
CAUTION
CUT HAZARD
To assure proper functioning of the unit, flow of condenser air
must not be obstructed from reaching the unit. Clearance from the
top of 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).
Failure to follow this caution may result in personal injury.
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.
Maintenance and Care for the Equipment Owner
Before proceeding with those things you might want to maintain
yourself, please carefully consider the following:
!
WARNING
!
WARNING
FIRE,
EXPLOSION,
HAZARD
ELECTRICAL
SHOCK
FIRE, EXPLOSION, ELECTRICAL SHOCK AND
CUT HAZARD
Failure to follow this warning could result in personal
injury, death or property damage.
Failure to follow this warning could result in personal
injury, death or property damage.
Do not use this unit if any part has been under water.
Immediately call a qualified service technician to inspect the
unit and to replace any part of the control system which has
been under water.
1. TURN OFF ELECTRICAL POWER TO YOUR UNIT
BEFORE
MAINTENANCE.
SERVICING
OR
PERFORMING
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 pro-
tective clothing.
Starting or Shutting Unit Off
To start the unit:
1. Turn on the electrical power supply to unit.
2. Select temperature and set MODE control to desired mode.
To shut unit off:
NOTE: If the unit is being shut down because of a malfunction,
call your dealer as soon as possible.
Air Filters
The air filter(s) should be checked 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.
1. Set system MODE control to OFF.
2. Turn off the electrical power supply to unit.
OPERATING YOUR UNIT
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
applications, 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 replaced.
The operation of your unit is controlled by indoor thermostat. You
simply adjust the thermostat and it maintains the indoor
temperature at the level you select. Most thermostats of cooling
systems have 3 controls: a temperature control selector, a FAN
control, and a SYSTEM or MODE control. Refer to your
thermostat owner’s manual for more information.
The other typical application is an accessory filter rack installed
inside the unit itself. The following information is given to assist in
changing filters used in these internal filter racks.
To better protect your investment and to eliminate unnecessary
service calls, familiarize yourself with the following facts:
Cooling Mode
Table 1 indicates the correct indoor filter size for your unit. Refer
to Fig. 3 to access filters installed in the accessory filter rack. If
using an Accessory Filter Rack, refer to the Installation Instructions
provided with it for correct filter sizes and quantities.
With the SYSTEM or MODE control set to COOL, your unit will
run in cooling mode until the indoor temperature is lowered to the
level you have selected. On extremely hot days, your unit will run
for longer periods at a time and have shorter “off” periods than on
moderate days.
Table 1 – Indoor Air Filter Data
Unit Size
24
Filter Size in. (mm)
20x20x1 (508x508x25)
20x24x1 (508x610x25)
24x30x1 (610x762x25)
24x36x1 (610x914x25)
Heating Mode (if installed with optional electric
heat)
Your system may also be equipped with an electric heating source.
On cold days and nights, place your MODE control to HEAT and
your system will automatically turn on the supplemental heat in
order to maintain the level of comfort you have selected.
30
36---42
48---60
To replace or inspect filters in accessory filter rack (See Fig. 3):
1. Remove the filter access panel using a 5/16--in. nut driver.
MAINTENANCE AND SERVICE
This section discusses maintenance that should be performed on
your system. Most maintenance should be performed by your
dealer. You, as the owner, may wish to handle some minor
maintenance for your new unit.
2. Remove the filter(s) by pulling it out of the unit. If the
filter(s) is dirty, clean or replace with a new one.
When installing the new filter(s), note the direction of the airflow
arrows on the filter frame, which should be pointed at the indoor
coil.
3. Reinstall filter access panel ensuring opening is air and
water tight.
3
If you have difficulty locating your air filter(s) or have questions
concerning proper filter maintenance, contact your dealer for
instructions. When replacing filters, always use the same size and
type of filter that was supplied originally by the installer.
!
CAUTION
UNIT OPERATION HAZARD
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.
FILTER
ACCESS
PANEL
LARGE CHASSIS
A10062
Fig. 5 -- Large Chassis Filter Access
Replacing or inspecting filters in units with econom-
izers
Small Chassis (See Fig. 4)
1. Remove return air duct cover at rear of unit using a 5/16--in.
nut driver.
2. Remove the filter(s) by pulling it out and through the unit
duct opening. If filter is dirty, replace both filters with new
ones.
Filter Access Panel
For Accessory Filter Rack
When installing the new filters, note the direction of the airflow
arrows on the filter frame, which should be pointing at the indoor
coil.
Access Panels
A09044
Fig. 3 -- Unit Access Panel
3. Reinstall duct cover ensuring opening is air and water tight.
Large Chassis (See Fig. 5)
1. Remove filter access door using a 5/16--in. nut driver.
2. Remove the filter(s) by pulling it out and through the unit
filter access door. If filter is dirty, replace both filters with
new ones.
Units with bent indoor coils, install 24 x 18 x 1 (610 x 457 x 25
mm) filter first and then install 24 x 16 x 1 (610 x 406 x 25) filter.
When installing the new filters, note the direction of the airflow
arrows on the filter frame, which should be pointing at the indoor
coil.
3. Reinstall filter access door ensuring opening is air and
watertight.
Table 2 – Indoor Air Filter Data with Economizer
Unit Size
Filter Size
2 each 20 x 12 x 1
30-36
(508 x 305 x 25 mm)
RETURN
1 each 24 x 14 x 1 (610 x 356 x 25 mm),
24 x 16 x 1 (610 x 406 x 25 mm)
1 each 24 x 16 x 1 (610 x 406 x 25 mm),
24 x 18 x 1 (610 x 457 x 25 mm)
42-48
DUCT COVER
(Remove for
filter access)
60*
*Units with bent indoor coil.
Fans and Fan Motors
SMALL CHASSIS
A10063
Periodically check the condition of fan wheels and housings and
fan--motor shaft bearings. Contact your dealer for the required
annual maintenance.
Fig. 4 -- Small Chassis Filter Access
4
Indoor and Outdoor Coils
Regular Dealer Maintenance
Cleaning of the coils should only be done by qualified service
personnel. Contact your dealer for the required annual
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 every other year) should include the following:
Condensate Drain
1. Inspection and, if required, cleaning of the outdoor and
indoor coils.
The drain pan and condensate drain line should be checked and
cleaned at the same time the cooling coils are checked by your
dealer.
2. Inspection and, if required, cleaning of the indoor coil drain
pan.
Compressor
3. Inspection and cleaning of blower wheel housing and
motor.
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.
All compressors are factory shipped with a normal charge of the
correct type of refrigeration grade oil. A compressor should rarely
require additional oil.
Condenser Fan
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 for signs of deterioration.
!
WARNING
PERSONAL INJURY AND UNIT DAMAGE
HAZARD
7. Inspection of all electrical wiring and components to assure
proper connection.
Failure to follow this warning could result in personal
injury, death or property damage.
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.
Do not poke sticks, screwdrivers, or any other object into
revolving fan blades.
The fan must be kept free of all obstructions to ensure proper
cooling. Contact your dealer for any required service.
10. Operational check of the unit to determine working
conditions. Repair or adjustment should be made at this
time.
Electrical Controls and Wiring
Your servicing dealer may offer an economical service contract that
covers seasonal inspections. Ask for further details.
Complete service instructions can be found in the unit Installation,
Start--up and Service Instructions.
Electrical controls are difficult to check without proper
instrumentation. If there are any discrepancies in the operating
cycle, contact your local dealer and request service.
Refrigerant Circuit
Warranty Certificate
Your unit has a limited warranty. Be sure to read the warranty
carefully to determine the coverage for your unit.
The refrigerant circuit is difficult to check for leaks without the
proper equipment. If inadequate cooling is suspected, contact your
local dealer for service.
Before you call for service...
...check for several easily--solved problems.
If insufficient heating or cooling is suspected:
!
WARNING
EXPLOSION, BURN AND ENVIRONMENTAL
HAZARD
(
) 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.
Failure to follow this warning could result in personal
injury, death or property damage.
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.
If your unit is not operating at all, check the following list for
easy solutions:
(
) Check to be sure that the temperature specified by your User
Interface is set below the indoor temperature during the cooling
season or above the indoor temperature during heating season. Be
sure the User Interface is set to COOL or HEAT and not OFF.
Unit Panels
(
) If your unit still fails to operate, call your servicing dealer for
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 pattern.
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.
In Case of Trouble
If you perform the steps above and unit performance is still
unsatisfactory, shut off the unit and call your dealer.
5
C a t a l o g N o : O M 5 0 E S --- V L --- 0 2
Copyright 2010 Carrier Corp. S 7310 W. Morris St. S Indianapolis, IN 46231
Printed in U.S.A.
Edition Date: 04/10
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
R e p l a ce s: OM 5 0 E S --- VL --- 0 1
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