Unit installation | Carrier 50XT-A Heat Pump User Manual

Baset 13 SEER Single---Packaged Air Conditioner System
With R---22 Refrigerant Single and Three Phase
2 to 5 Nominal Tons (Sizes 024---060)
Owner’s Information Manual
Fig. 1 -- Unit 50ZPA
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.
Model # _____________________________________
Date Installed ________________________________
Serial # ______________________________________
Company Name_______________________________
ACCESSORIES (List type and model #)
Phone Number _______________________________
Technician Name _____________________________
This manual must be left with the equipment owner.
Note: If the unit is being shut down because of a malfunction, call
your dealer as soon as possible.
1. Set the temperature switch to OFF.
Installation and servicing of this equipment can be hazardous due to
mechanical and electrical components. Only trained and qualified
personnel should install, repair, or service this equipment.
2. Turn off the electrical power supply to unit.
Untrained personnel can perform basic maintenance functions such
as cleaning and replacing air filters. All other operations must be
performed by trained service personnel. When working on this
equipment, observe precautions in the literature, on tags, and on labels attached to or shipped with the unit and other safety precautions
that may apply.
All routine maintenance should be handled by skilled, experienced
personnel. Your dealer can help you establish a standard procedure.
Follow all safety codes. Installation must be in compliance with local and national building codes. Wear safety glasses, protective
clothing, and work gloves. Have fire extinguisher available. Read
these instructions thoroughly and follow all warnings or cautions
included in literature and attached to the unit.
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).
For your safety, keep the unit area clear and free of combustible
materials, gasoline, and other flammable liquids and vapors.
Maintenance and Care for the Equipment Owner
Before proceeding with those things you might want to maintain
yourself, please carefully consider the following:
Recognize safety information. This is the safety--alert symbol
When you see this symbol on the unit and in instructions or manuals,
be alert to the potential for personal injury.
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.
Failure to follow this warning could result in personal injury,
death or property damage.
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.
Do not use this unit if any part has been underwater.
Immediately call a qualified service technician to inspect the
unit and to replace any part of the control system which has
been underwater.
Failure to follow this warning could result in personal injury,
death or property damage.
Note: Installer: This manual should be left with the equipment user.
Understand these signal words: DANGER, WARNING, and CAUTION. These words are used with the safety--alert symbol. DANGER identifies the most serious hazards which will result in severe
personal injury or death. WARNING signifies hazards which could
result in personal injury or death. CAUTION is used to identify unsafe practices which may result in minor personal injury or product
and property damage. NOTE is used to highlight suggestions which
will result in enhanced installation, reliability, or operation.
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 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.
Failure to follow this warning could result in personal injury,
death or property damage.
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.
Table 1 indicates the correct indoor filter size for your unit.
Table 1—Indoor Air Filter Data
Unit Size
Filter Size
024--- 036
24x24x1 (610x610x25 mm)
042--- 060
30x30x1 (762x762x25 mm)
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.
1. Turn on the electrical power supply to the unit.
2. Select temperature and set system switch to desired mode.
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:
Failure to follow this caution may result in property damage.
1. Inspection and, if required, cleaning of the indoor coil
condensate drain.
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.
2. Inspection and, if required, cleaning of the evaporator drain
3. Inspection and cleaning of blower wheel housing and motor.
Fans and Fan Motors
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.
Periodically check the condition of fan wheels and housings and
fan--motor shaft bearings. No lubrication of condenser--or
evaporator--fan bearings or motors is required or recommended.
5. Inspection of the unit base to ensure that no cracks, gaps, etc.,
exist which may cause a hazardous condition.
Indoor and Outdoor Coils
Cleaning of the coils should only be done by qualified service personnel. Contact your dealer for the required annual maintenance.
6. Inspection of the unit casing for signs of deterioration.
7. Inspection of all electrical wiring and components to ensure
proper connection.
Condensate Drain
8. Inspection for leaks in the refrigerant circuit. Pressure--check
to determine appropriate refrigerant charge.
The drain pan and condensate drain line should be checked and
cleaned at the same time the cooling coils are checked by your dealer.
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.
All compressors are factory shipped with a normal charge of the correct type of refrigeration grade oil in them and should rarely require
additional oil.
10. Operational check of the unit to determine working
conditions. Repair or adjustment should be made at this time.
Your servicing dealer may offer an economical service contract that
covers seasonal inspections. Ask for further details.
Condenser Fan
Complete service instructions can be found in the unit Installation,
Start--up and Service Instructions.
Warranty Certificate
Your 50ZPA unit has a limited warranty. Be sure to read the warranty
carefully to determine the coverage for your unit.
Failure to follow this warning could result in personal injury,
death or property damage.
Before you call for service...
Do not insert sticks, screwdrivers, or any other object into
revolving fan blades.
...check for several easily--solved problems.
If insufficient heating or cooling is suspected:
The fan must be kept free of all obstructions to ensure proper cooling. Contact your dealer for any required service.
( ) Check for sufficient airflow.
( ) Check the air filter for dirt.
Electrical Controls and Wiring
( ) 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.
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.
If your unit is not operating at all, check the following list for
easy solutions:
Refrigerant Circuit
The refrigerant circuit is difficult to check for leaks without the proper equipment. If inadequate cooling is suspected, contact your local
dealer for service.
( ) Check to be sure that your thermostat temperature selector is set
below the indoor temperature during the cooling season. Be sure the
SYSTEM switch or MODE control is in the COOL position and
not in the OFF position.
( ) If your unit still fails to operate, call your servicing dealer for
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.
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.
In Case of Trouble
If you perform the steps above and unit performance is still unsatisfactory, shut off the unit and call your dealer.
Unit Panels
Dealer’s Name
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.
Unit Model
Unit Serial Number
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 2008 Carrier Corporation
Printed in the U.S.A.
Edition Date: 02/08
Manufacturer reserves the right to change, at any time, specifications and design without notice and without obligation.
Catalog No: OM50ZPA ---01
Replaces: OM50--- 40
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