Carrier 50JZ Heat Pump User Manual
Contents
1. HEATING amp COOLING 50JZ Single Packaged 50Hz CE Electric Heat Pump Units with Puron R 410A Refrigerant Visit www carrier com A Guide to Operating and Maintaining Your Single Packaged Electric Heat Pump Units NOTE Read the entire instruction manual before starting the installation SAFETY CONSIDERATIONS Note to Installer This manual should be left with the equipment user A WARNING Do not store or use gasoline or other flammable vapors and liquids in the vicinity of these or any other appliances Failure to follow this warning could result in fire serious injury or death A WARNING 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 Failure to follow this warning could result in electrical shock fire serious injury or death A WARNING Before performing recommended maintenance be sure the main power switch to unit is turned off and lockout tag installed Electric shock could cause serious injury or death STARTING OR SHUTTING UNITS OFF 1 To start either of these units a Turn on the electrical power supply to unit b Select temperature and set SYSTEM switch or MODE control to desired mode 2 To shut this unit off NOTE If the unit is being shut down because of a malfunction call your dealer as soon as possible a Set system SWITC2. service personnel Contact your dealer for the required annual mainte nance 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 dealer Compressor All compressors are factory shipped with a normal charge of the correct type refrigeration grade oil A compressor should rarely require additional oil Condenser Fan A CAUTION Do not poke sticks screwdrivers or any other objects into revolving fan blades Injury or equipment damage may result The fan must be kept free of all obstructions to ensure proper cooling Contact your dealer for any required service Electrical Controls and Wiring Electrical controls are difficult to check without proper instrumen tations If there are any discrepancies in the operating cycle contact your dealer and request service 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 A WARNING System under pressure Relieve pressure and recover all refrigerant before system repair or final unit disposal to avoid serious 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 either of these units be sure all panels are fastened securely in place to prevent ra
3. that covers seasonal inspections Ask for further details Complete service instructions can be found in each unit s Instal lation Start Up and Service Instructions BEFORE YOU CALL FOR SERVICE check for several easily solved problems If insufficient heating or cooling is suspected 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 If your unit is not operating at all check the following list for easy solutions Check to be sure that your thermostat temperature selector is set below the indoor temperature during the cooling season or above the indoor temperature during heating season Be sure the SYS TEM switch or MODE control is in the COOL or HEAT 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 IN CASE OF TROUBLE If you perform the steps above and unit performance is still unsatisfactory shut off the unit and call your dealer Dealer s Name Telephone Unit Model
4. H or MODE control to OFF b Turn off the electrical power supply to unit and install lockout tag OPERATING YOUR HEAT PUMP The operation of your heat pump system is controlled by the indoor thermostat You simply adjust the thermostat and it maintains the indoor temperature at the level you select Most thermostats of heat pump 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 To better protect your investment and to eliminate unnecessary service calls familiarize yourself with the following facts 1 During heating increasing the thermostat setting more than 2 F 1 1 C may cause the supplemental heaters to be turned on for a short period of time to satisfy the thermostat Needless use of the supplementary heat reduces potential energy sav ings 2 Ice or frost tends to form on the coil during winter heating operation Your heat pump is designed to automatically melt the ice When in this defrost cycle it is normal for steam or fog to rise from the outdoor unit Do not be alarmed Me w y T C990064 Fig 1 Unit 50JZ 50Hz Step 1 Cooling Mode With the SYSTEM or MODE control set to COOL your heat pump will run in cooling mode until the indoor temperature is lowered to the level you have selected On extremely hot days your heat pump will run for longer periods at a time and have shorter off pe
5. Unit Serial Number Copyright 2002 CARRIER Corp 7310 W Morris St e Indianapolis IN 46231 om50c2 Manufacturer reserves the right to discontinue or change at any time specifications or designs without notice and without incurring obligations rook 4 PC 101 Catalog No 005 00009 Printed in U S A Form OM50 C2 Pg 4 2 02 Replaces New a aj oa
6. in from entering unit cabinet and to prevent disruption of the 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 every other year should include the following 1 Inspection and if required cleaning of the outdoor and indoor coils 2 Inspection and if required cleaning of the indoor coil drain pan 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 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 7 Inspection of all electrical wiring and components to assure proper connection 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 10 Operational check of the unit to determine working condi tions Repair or adjustment should be made at this time Your servicing dealer may offer an economical service contract
7. nd the outdoor temperature drops below 45 F 7 2 C moisture may begin to freeze on the surface of the coil If allowed to build up this ice would impede airflow across the coil and reduce the amount of heat absorbed from the outside air So to maintain energy efficient operation your heat pump has an automatic defrost mode The defrost mode starts at a preset time interval of 30 minutes although it may be reset to 60 90 or 120 minutes Defrost will start at the preset time only if the ice is sufficient to interfere with normal heating operation After the ice is melted from the coil or after a maximum of 10 minutes in defrost mode these units automatically switch back to normal heating operation Do not be alarmed if steam or fog appears at the outdoor unit during defrost mode Water vapor from the melting ice may condense into a mist in the cold outside air During certain weather conditions such as heavy snow and freezing rain it is not uncommon for ice to build up on the unit grille This is 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 Step 5 Emergency Heat Mode This allows your supplemental heating source to keep your home or office warm until your heat pump can be serviced MAINTENANCE AND SERVICE This section discusses maintenance that should be performed by your dealer and ca
8. re you as the owner may wish to handle for your new heat pump ROUTINE MAINTENANCE All routine maintenance should be handled by skilled experienced personnel Your dealer can help you establish a standard proce dure For your safety keep your unit area clear and free of combustible materials gasoline and other flammable liquids and vapors To assure proper functioning of your unit flow of condenser air must not be obstructed from reaching the unit Minimum 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 mini mum clearance MAINTENANCE AND CARE FOR THE EQUIPMENT OWNER Before proceeding with those things you might want to maintain yourself please carefully consider the following A WARNING 1 TURN OFF ELECTRICAL POWER TO YOUR UNIT BEFORE SERVICING OR PERFORMING MAINTE NANCE ELECTRIC SHOCK COULD CAUSE SERI OUS INJURY OR DEATH 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 keep sharp edges to a minimum be extremely careful when handling parts or reaching into the unit Air Filters The 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 blo
9. riods than on moderate days Step 2 Heating Mode With the SYSTEM or MODE control of your indoor thermostat set to HEAT your heat pump will run in heating mode until room temperature is raised to the level you have selected Of course your heat pump will run for longer periods to maintain a comfortable environment on cooler days and nights than on moderate ones Step 3 Supplemental Heat Your heat pump is your primary heating source Your system may also be equipped with a supplemental heating source such as electric heat On cold days and nights your system will automati cally turn on the supplemental heat in order to maintain the level of comfort you have selected When your heat pump needs additional heat to keep you comfort able your Carrier electronic thermostat will turn on the supple mental heat if equipped and display the AUX HT message Manufacturer reserves the right to discontinue or change at any time specifications or designs without notice and without incurring obligations Book 1 4 PC 101 Catalog No 005 00009 Tab 6a 8a Printed in U S A Form OM50 C2 Pg 1 2 02 Replaces New Table 1 Indoor Air Filter Data UNIT SIZE S02 aoe 024 030 036 048 060 press an 20 x 20 20 x 20 20 x 24 24 x 30 24 x 30 es 508 x 508 508 x 508 508 x 609 6 609 6 x 762 609 6 x 762 Step 4 Defrost Mode When your heat pump is providing heat to your home or office a
10. wer motor and can cause the motor to overheat and shut down Table 1 indicates the correct filter size for your unit Refer to Fig 2 to access the filters FB FILTER ACCESS PANEL For accessory filter rack c99094 Fig 2 Filter Access Panel Vertical Supply Shown To replace or inspect filters or accessory filter rack when supplied 1 Remove the filter access panel using a 5 16 in 7 9 mm nut driver or wrench 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 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 A CAUTION Neveroperate your unit without the filter s in place Failure to heed this warning may result in damage to the blower motor and or compressor An accumulation of dust and lint on internal parts of your unit can cause loss of efficiency and in some cases a fire Fans and Fan Motor 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
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