Carrier Heat Pump 50XT A User Manual

50XT---A  
Infinityr 15 SEER  
Single Packaged Heat Pump System  
with PuronR (R---410A) Refrigerant  
Owner’s Information Manual  
A09032  
Fig. 1 - Unit 50XT-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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normal for these weather conditions. Do not attempt to remove the  
ice from the unit grille. This condition will not affect the proper  
function of the unit and will clear within a few days.  
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.  
Table 1 indicates the correct filter size for your unit.  
Emergency Heating Mode  
Table 1—Air Filters Located Inside Unit  
(For Replacement Purposes)  
In the event of primary unit heat failure, the emergency heat mode  
allows your supplemental heating source to keep your home or of-  
fice warm until your unit can be serviced. Contact your dealer in the  
event of primary unit heat failure.  
Unit Size  
Quantity  
Filter Size  
12x20x1  
(305x508x25)  
24---30  
2
Emergency Cooling Mode  
12x24x1  
In the event of UI failure, the emergency cooling mode allows your  
unit to keep your home or office cool until your UI can be serviced.  
Contact your dealer for more information.  
36---60  
3
(305x610x25)  
To replace or inspect filters in accessory filter rack:  
MAINTENANCE AND SERVICE  
1. Remove the filter access panel (See Fig. 2) using a 5/16--in.  
nut driver.  
This section discusses maintenance that should be performed by  
your dealer and care you, as the owner, may wish to handle for your  
new unit.  
2. Removethefilter(s)by pulling itoutoftheunit.If thefilter(s)  
is dirty, clean or replace with a new one.  
Routine Maintenance  
When installing the new filter(s), note thedirection ofthe airflow ar-  
rows on the filter frame.  
All routine maintenance should be handled by skilled, experienced  
personnel. Your dealer can help you establish a standard procedure.  
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.  
!
CAUTION  
FOR YOUR SAFETY  
Failure to follow this caution may result in personal injury.  
Do not store or use gasoline or other flammable vapors and  
liquids in the vicinity of this or any other appliance.  
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 [1067 mm] in.  
clearance) and the duct side (12 in. [305 mm] minimum clearance).  
Maintenance and Care for the Equipment Owner  
Before proceeding with those things you might want to maintain  
yourself, please carefully consider the following:  
!
WARNING  
Filter Access Panel  
For Accessory Filter Rack  
FIRE, EXPLOSION, ELECTRICAL SHOCK AND  
CUT HAZARD  
Failure to follow this warning could result in personal injury,  
death or property damage.  
Access Panels  
1. TURN OFF ELECTRICAL POWER TO YOUR UNIT  
A09045  
BEFORE  
MAINTENANCE.  
SERVICING  
OR  
PERFORMING  
Fig. 2 - Accessory Filter Rack Access Panel  
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.  
!
WARNING  
FIRE AND UNIT OPERATION HAZARD  
Failure to follow this warning could result in personal injury,  
death or property damage.  
Air Filters  
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.  
The air filter(s) should be checked at least every 3 months 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.  
Fans and Fan Motor  
Periodically check the condition of fan wheels and housings and  
fan--motorshaftbearings.Contactyourdealerforthe requiredannu-  
al maintenance.  
This unit must have an air filter in place before it can be operated.  
These filters should be located in at least one of 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.  
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.  
3
 
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 deal-  
er.  
2. Inspection and, if required, cleaning of the indoor coil drain  
pan.  
3. Inspection and cleaning of blower wheelhousing andmotor.  
Compressor  
4. Inspection of all supply and return air ducts for leaks,  
obstructions, and insulation integrity. Any problems found  
should be resolved at this time.  
All compressors arefactory shippedwith anormal chargeof thecor-  
rect type of refrigeration grade oil. A compressor should rarely re-  
quire additional oil.  
5. Inspectionof theunit baseto ensurethat nocracks, gaps,etc.,  
exist which may cause a hazardous condition.  
Condenser Fan  
6. Inspection of the unit casing for signs of deterioration.  
!
WARNING  
7. Inspection of all electrical wiring and components to assure  
proper connection.  
PERSONAL INJURY AND UNIT DAMAGE HAZARD  
8. Inspection for leaks in the refrigerant circuit. Pressure check  
to determine appropriate refrigerant charge.  
Failure to follow this warning could result in personal injury,  
death or property damage.  
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 cool-  
ing. Contact your dealer for any required service.  
10. Operational check of the unit to determine working  
conditions.Repairoradjustmentshouldbe madeat thistime.  
Electrical Controls and Wiring  
Your servicing dealer may offer an economical service contract that  
covers seasonal inspections. Ask for further details.  
Electrical controlsare difficultto checkwithout properinstrumenta-  
tion. If there are any discrepancies in the operating cycle, contact  
your local dealer and request service.  
Complete service instructions can be found in the unit Installation,  
Start--up and Service Instructions.  
Refrigerant Circuit  
Warranty Certificate  
Therefrigerantcircuitisdifficulttocheckforleakswithout theprop-  
er equipment. If inadequate cooling is suspected, contact your local  
dealer for service.  
Your unit has a limited warranty. Be sure to read the warranty care-  
fully to determine the coverage for your unit.  
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  
forblockedreturnor supplyair grilles. Be surethey areopen and un-  
obstructed. If these checks do not reveal the cause, call your servic-  
ing dealer.  
Failure to follow this warning could result in personal injury,  
death or property damage.  
If your unit is not operating at all, check the following list for  
easy solutions:  
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.  
( ) Check to be sure that the temperature specified by your UI is set  
below the indoor temperature during the cooling season or above  
the indoor temperature during heating season. Be sure the UI is set  
to COOL or HEAT and not OFF.  
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.  
(
) 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 of-  
fer suggestions over the phone, or save valuable time through  
knowledgeable preparation for the service call.  
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 every other year) should include the following:  
In Case of Trouble  
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  
Edition Date: 03/09  
Catalog No: OM50XT---01  
Manufacturer reserves the right to change, at any time, specifications and design without notice and without obligation.  
Replaces: OM50---53  
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