Carrier 52C Series Packaged Terminal Air Conditioners and Heat Pumps Owner’s Manual

Carrier 52C Series Packaged Terminal Air Conditioners and Heat Pumps

Owner’s Manual

52C and 52P SERIES

1•800•894-6449 (in USA and Canada)
For Service/Technical Assistance
1 •800•830-8600 (Mexico)

GENERAL

Thank you for choosing Carrier! You can feel confident in your selection because the same pride in craftsman­ship and engineering knowledge that goes into Carrier equipment at the Astrodome in Texas, the Sistine Chapel in Rome, the US Capitol Hall of Congress, and thousands of other installations worldwide has gone into the construction of this unit.

The Carrier package terminal air conditioners and heat pumps provide a high standard of quality in per­formance, workmanship, durability and appearance as they heat and cool the occupied air space year round.

This manual provides information for ease of installa­tion, operation and maintenance of the 52C and 52P units. The following units are covered in this manual (see Figure 1 for additional unit information):

52CE 60 Hz cooling with electric heat units
52CQ 60 Hz cooling, electric heat, and heat pump units SZPE 60 Hz cooling with electric heat units SZPQ 60 Hz cooling, electric heat, and heat pump units 52PC 60 Hz cooling only units

All models are designed for through-the-wall installa­tion. Separate installation instructions are included with all accessory components. See Accessories section on page 15 for complete listing of accessories.

FIGURE 1 – SAMPLE DATA INFORMATION PLATE

UNIT INSPECTION

Examine unit for damage incurred during shipment. File a claim immediately with the transit company if damage is found.

The data information plate (Figure 1) lists the model number, voltage ranges, and other important electrical information about this product. Reading and understanding this material is important for proper use of this unit. To access the information plate, the front panel must be removed; see Figure 2.

FRONT PANEL
Remove front panel from unit by grasping the panel firmly at the center top and center bottom. Pull the panel upward at the bottom and forward at the top to release magnetic latches and partition hooks. See Figure 2.

NOTE: Front panel may be secured to chassis with 2 screws located behind indoor air inlet filters. In order to remove these screws, the filters must be removed first. Refer to page 11 in this manual for instructions on removing indoor air inlet filters.

IMPORTANT: The front panel has to be off the unit to complete future checks and installation procedures. Do not reinstall front panel at this time.

Using Figures 1 and 3 as reference, verify that the packaged terminal product ordered will operate properly in your facility. If you do not understand the information given or have questions about the product, please call your local dealer or distributor.

FIGURE 2 – REMOVING FRONT PANEL

Replacement Package Terminal Air Conditioner, CLASSIFIED BY UNDERWRITERS LABORATORIES INC., AS TO ELECTRIC SHOCK, FIRE AND CASUALTY HAZARDS ONLY. FOR FIELD INSTALLATION WITH EXISTING WALL SLEEVES, OUIDOOR LOUVERS, AND INDOOR PANELS AS SPECIFIED ON THE PRODUCT.

FIGURE 3 — MODEL NUMBER NOMENCLATURE

To install the front panel, follow the procedure outlined below:

Replace the unit front panel.

1. Hold the front panel firmly at the center top and center bottom at a 5 to 10 degree angle from vertical.
2. Place the top of the front panel onto the unit making sure the top engagement posts have engaged the slots on the unit. Front panel should be flat against the top of the unit.
   3. Gently lower the front panel onto the chassis, ensuring that the power cord {or conduit) is routed through the front panel notch. Magnetic latches at bottom of front panel will secure the front panel to the unit.

To install locking feature on front panel, be sure front panel is already installed on unit and follow the steps below:

NOTE: Two field-supplied no. 8, 1/2-in. sheet metal screws are required to secure front panel to chassis.

1. Remove both indoor air inlet filters to expose front panel engagement holes. See Figure 4.
2. Secure front panel to chassis by attaching the field-supplied screws into engagement holes. Do not over tighten.
3. Replace both indoor air inlet filters.
   NOTE: Front panel aligrunent may have to be adjusted slightly to line with chassis.

FIGURE 4 – FRONT PANEL INSTALLATION WITH LOCKING FEATURE

ELECTRICAL DATA

WARNING
ELECTRICAL SHOCK HAZARD

DO NOT alter cord or plug, and DO NOT use an extension cord. Personal injury or damage to the unit may result.

Be sure that your outlet matches the appropriate blade configuration of the supplied plug and that it is within reach of the service cord. A hardwire kit is available as an accessory to change cord-connected units to hardwired units. (See Accessories table on page 15.)

IMPORTANT: All standard cord-connected 265-v units will require a field- installed electrical sub­base accessory.

ALL UNITS

• WIRE SIZE- Use recommended wire size given in
Table 1 and install a single branch circuit. All wiring must comply with local and national codes. All units are designed to operate off single branch circuits only.

NOTE: Use copper conductors only.

• GROUNDING – For safety and protection, the unit is grounded through the service cord plug or through separate ground wire provided on hardwired units. Be sure that the branch circuit or general purpose outlet is grounded.

**TABLE 1 – SUGGESTED BRANCH CIRCUIT WIRE SIZES***

AWG -American Wire Gage
*Single circuit from main box.
Based on copper wire at 60 C temperature rating.

VOLTAGE SUPPLY
Check voltage supply at outlet. For satisfactory results, the voltage range must always be within the ranges found on the data information plate (shown in Figure 1).

• CORD-CONNECTED UNITS – The 250-v field supplied outlet must match the plug for the standard 208/230-v units and be within reach of the service cord. The standard cord-connected 265-v units require an accessory electrical subbase for operation. See Accessories table. page 15, for subbase selection. Refer to Table 2 for proper receptacle and fuse type.

• POWER CORD PRO TECTION – The power cord for the 230/208-v unit provides both personal shock protection and power cord fire prevention. Unit power automatically disconnects when unsafe conditions are detected. Power to the unit can be restored by pressing the RESET button on plug head.

Upon completion of unit installation for 230/208-v models, an operational check should be performed using the TEST/RESET buttons on the plug head. See Figure 5.

NOTE: The 265-v models do not incorporate this feature as they require use of the electrical subbase accessory.

TABLE 2 – RECEPTACLES AND FUSE TYPES – 250,265 VOLTS

HACR – Heating, Air Conditioning, Refrigeration
*May be used for 15-amp applications if fused for 15 amp.

INSTALLATION

CHASSIS INSTALLATION
Units are shipped without a sleeve. In applications where unit is a replacement, it is recommended that a Carrier sleeve and grille be used.

The 52C and 52P units can retrofit General Electric, Amana, Trane, and Friedrich sleeves/grilles {be sure outdoor grille is installed on the sleeve). See Table 3 for details. Carrier Corporation must approve any other retrofit application.

For competitive retrofit applications, be sure that the foam seals (factory- installed on the tube sheets) pro­vide a good seal between the outdoor grille and out­door coil tube sheets. These foam seals provide a barrier to separate outdoor coil leaving air from mix­ing with the outdoor incoming air (known as air recir­culation). See Figure 5.

CAUTION

For retrofit applications, foam seals on outdoor coil tube sheets must make a seal between the coil and the grille or loss of performance and premature damage to the major components can result.

TABLE 3 – RETROFIT WALL SLEEVES

*FR-SLEEVE-EXT accessory is required for retrofit into Friedrich
(T-Series) wall sleeves.

FIGURE 5 – UNIT COMPONENTS

• COMPETITIVE SLEEVE PREPARATION

IMPORTANT: Inspect the wall sleeve thoroughly prior to installation. Manufacturer does not assume responsibility for costs or damages due to defects in the sleeve or improper installation.

FIGURE 6 — REMOVE BAFFLES ON COMPETITIVE OUTDOOR GRILLES

WARNING
Disconnect all power to unit to avoid possible electrical shock during installation. Remove any existing foam baffles that are installed on the outdoor grille if present. See Figure 6.

GE Sleeves only
Metal Wall Sleeve — Remove metal clip on mounting rail located on left, inside bottom of metal sleeve and discard. See Figure 7.
Plastic Sleeve — Remove bottom seal from plastic sleeve. See Figure 8.

INSTALLATION OF A CARRIER WALL SLEEVE USING A NON-CARRIER GRILLE
This application has become more common due to pre-manufactured windows with built-in grilles or renovations where a Carrier sleeve is used with an existing non-Carrier grille.

Use of a Carrier wall sleeve with a non-Carrier grille requires installation of an Accessory Baffle Kit, which ensures a good seal between the unit and exterior grille and prevents air recirculation. (See Figures 9 and 10.) Air recirculation is a large contributor to performance loss and premature damage to major components.

INSTALL CHASSIS IN SLEEVE (See Figures 11to 13)

1. Inspect foam gaskets (top, bottom, both sides) on chassis. Replace foam gaskets ff torn or missing.

IMPORTANT: The gaskets combine with the sleeve face to create a weather barrier. If the chassis is installed in a non-Carrier sleeve, this weather bar­rier may not be effective.

  WARNING
Chassis weighs up to 150 lb. For personal protection, seek help when lifting the unit. Lift unit by holding unit basepan.

FIGURE 11 – LOCATION OF SHIPPING TAPE ON VENT DOOR

FIGURE 12 – UNIT GASKETS AND TUBE SHEETS

2. If retrofitting into a GE, Amana, Trane, or Friedrich wall sleeve/grille, remove any existing foam seals from competitive manufacturer’s grille before installing unit.
3. Remove shipping tape from vent door. See Figure 11.

CAUTION
Failure to remove shipping tape will prevent fresh air vent door from opening and may result in damage to the vent door cable.
4. Carefully remove power cord packing material and discard.
5. Lift chassis level with wall sleeve.
6. Slide chassis into wall sleeve until foam gaskets rest firmly against front of wall sleeve. See Figure 12.
7. Screw chassis to wall sleeve with four 1 ¾-in. long screws taped to the control box. Screw holes are located on both sides of the mounting angles of the chassis. For Carrier wall sleeves, use the top-most and bottom-most screw holes. For competitive wall sleeves. line up the correct attachment holes on the chassis with the holes in the sleeves. See Figure 13.

WALL THERMOSTAT INSTALLATION

The following instructions apply to RC and RP units only.
NOTE: Carrier thermostats are recommended. See Accessories section.

IMPORTANT: Only trained, qualified personnel and service mechanics should install electrical accessories on Carrier 52C and 52P series products per Carrier’s installation instructions. Please con­tact your local electrical contractor, dealer, or dis­tributor for assistance.

• THERMOSTAT WIRE ROUTING – Thermostat wire is field supplied. Recommended wire gage is 18 to 20 gage solid thermostat wire . Thermostat wire should always be routed around or under, NEVER through, the wall sleeve. The wire should then be routed behind the front panel to the easily accessible terminal connector. See Figures 14 and 15.

• INSTALL THERMOSTAT – All remote control units.

1. Check to be sure power to unit is disconnected.

2. Pull terminal connector to remove.
   NOTE: Terminal connector can be removed and replaced to simplify thermostat wiring.

3. Connect wires from terminals on the thermostat to terminals on chassis terminal board connector. See Figures 15 and 16.

FIGURE 14 – CONTROL BOX TERMINAL CONNECTOR FOR WALL THERMOSTAT MODELS

4. Reinstall terminal connector.
5. Restore power to unit.
NOTE: Refer to thermostat installation instructions for details on installing thermostat.
NOTE: Fan speed is user-selectable from the control panel on the unit.

FIGURE 15 – TERMINAL CONNECTOR REMOVAL AND REPLACEMENT

FIGURE 16 – WIRING CONNECTIONS

OPERATION

IMPORTANT: When unit is first started, high humidity conditions can cause condensation to form on discharge grille. Keep doors and windows closed. Room humidity decreases and moisture evaporates.

COMFORT CONTROLS

• ADJUST AIRFLOW DIRECTION -The discharge air grille is mounted on the front panel so that the air discharges forward. If upward discharge is required, remove the grille by removing screws on back of front panel. Rotate grille 180 degrees and reinstall on the front panel.
• ADJUST VENT -The vent handle is on the left side of the unit. Turn handle to open or close vent. Vent will remain in last desired position until handle is turned again. Magnet will ensure positive closure. See Figure 17.
• SETTING TEMPERATURE LIMITS -Setting tem­perature limits on the unit provides the user a restricted range of temperature control. See Figure 18.

NOTE: This adjustment is optional and is not applica­ble to remote control units.

FIGURE 17 -VENT DOOR

The temperature limits are factory set to full range, which is 60 F to 90 F. To set restricted rotation of the temperature control knob:

1. Remove front panel.
2. Remove temperature control knob to expose tem­perature limiter.
3. Remove standoff pins from the 60 F and 90 F indi­cator holes.
4. Replace standoff pin in hole for desired minimum temperature.
5. Replace standoff pin in hole for desired maximum temperature.
6. Reinstall temperature control knob.
7. Reinstall front panel.

NOTE: Temperature indicators stamped on tempera­ture limiter are approximate and represent degrees F.

FIGURE 18 -OPERATING CONTROLS

OPERATING CONTROLS

The following controls are located on the front of the control box door, under front panel. To obtain access to operating controls, remove the unit front panel as shown on page 2. See Figure 18.

The following controls are located on the front of the control box door, under front panel. To obtain access to operating controls, remove the unit front panel as shown on page 2. See Figure 18.

• FAN CYCLE SWITCH – (Typically available at wall thermostat on RC or RP units.) This allows the fan to operate in two modes:
CON {Continuous} – This setting allows the fan to run continuously, circulating air even when the temperature setting has been satisfied. This switch helps to maintain the room temperature closer to the thermostat setting. Use this switch position when maximum comfort is desired. This is the factory default setting.

CYC (Cycle) – This setting allows the fan to cycle on and off with the compressor during heating or cooling. The fan stops when the temperature setting is satisfied.
This results in longer unit off-time and wider variations in room temperature and humidity.

• OUTDOOR THERMOSTAT {52CQ and 52PQ HE AT PUMP UNITS ONLY) – If the setscrew is left at the factory setting (in the heat pump position), the unit will operate in the reverse cycle heating mode. See Figure 18. When the temperature of the outdoor coil reaches 20 F {approximately 35 F outdoor air temperature), the compressor will shut down as unit is no longer capable of adequate heating in heat pump mode. The electric heater then becomes the primary heating source. The electric heater remains on until the temperature of the outdoor coil reaches 40 F; then the electric heater is shut off and the compressor is energized. Once the compressor is energized, the heat pump again becomes the primary heating source.

To set unit to operate in electric heat mode only, turn the setscrew to the electric heat position. See Figure 18.

FIGURE 19 – 52P UNIT CONTROLS SHOWN

IMPORTANT: If setscrew on standard heat pump unit is set to electric heat mode operation, the compressor is disabled for both heating and cooling operations. If setscrew on heat pump unit with wall thermostat control is set to electric heat mode operation, the compressor will be disabled only for heating operation.

OPERATING MODES (See Figures 19 and 20.)
• OUTSIDE AIR – To bring outside air into occupied space, turn the vent handle to the full open position. See Figure 17.
• OFF – The OFF mode terminates unit operation.
• FAN- The FAN mode will circulate air in the space at high speed and at high or low speed for cooling only models.
• HIGH HEAT OR HIGH COOL – Select mode and rotate temperature knob to desired comfort level. This function provides maximum heating or cooling. and is recommended to raise or lower the room temperature quickly.
• LOW HE AT OR LOW COOL – Select mode and rotate temperature knob to desired comfort level. This function provides minimum heating or cooling with maximum dehumidification and quietest operation.
• FAN SPEED CONTROL FOR 52P AND 52C WALL THERMOSTAT MODELS – For maximum comfort, fan speed is user selectable at the unit. See Figure 20.

FIGURE 20 – 52P UNIT WITH WALL THERMOSTAT CONTROL SHOWN (Blank Plate)

CARE AND MAINTENANCE

In order to maintain proper performance of your packaged terminal air conditioner or heat pump, it is very important that the fan and outdoor coil, the blower wheel, blower scroll, electric heater, and all drain passages are thoroughly cleaned at least once per year. Carrier recommends that as a minimum. the cleaning should be conducted prior to the start of each heating season. The air inlet filters should be cleaned every month.

Depending on local conditions. more frequent cleaning of the unit may be required to ensure optimum performance and long operating life. Examples of these special conditions include areas where construction dust or heavy airborne dirt is found, or environments that promote the growth of fungus.

CAUTION
Some local conditions and environments can cause fungi to grow inside the air conditioner, especially on indoor blower section. Dried fungi, dirt and other foreign material are fire hazards. Be sure to clean unit according to the instructions that follow.

INDOOR-AIR INLET FILTERS
• INDOOR-AIR INLET FILTERS should be cleaned once each month.

IMPORTANT: Filters may become clogged if not
cleaned properly. Clogged filters will restrict airflow
which may lead to severe component damage
and efficiency loss.

• CLEANING INDOOR-AIR INLET FILTER – Two interchangeable air filters are located on the backside of the front panel. Each can be removed and cleaned one at a time. To remove and clean the filter, follow the steps below:

1. Grasp filter with both hands.

2. Gently pull the filter up and away from the unit. See Figures 5 and Z 1.

3. To clean filter, use a vacuum or soft bristle brush with a small amount of mild detergent.
   NOTE: If detergent is used, remove any detergent residue with a gentle stream of clean water.

4. Allow filters to air dry.

5. Re-insert dry filters back into front panel.
   Additional filters are available in multi-packs. Refer to Accessories section.

FIGURE 21 – INDOOR-AIR INLET FILTER REMOVAL

EXTERNAL PARTS
• EXTERNAL PARfS include the polymer sleeve and grilles. The sleeve manufacturer recommends cleaning the surface, including the grilles, with household detergent and water.

INTERNAL PARTS
• INTERNAL PARTS should be cleaned at least once during the year. The outdoor vent filter should be cleaned at least once during a cooling or heating season.
Internal parts that should be cleaned include the following (see Figures 5, 22, and 23):

• Outdoor vent filter
• Basepan
• Outdoor orifice ·and fan
• Indoor and outdoor refrigeration coils
• Indoor blower wheel
• Wire screen
• Scroll
• Wall sleeve internal surfaces
• Outdoor grille

PREVENTATIVE MAINTENANCE

Preventative maintenance is essential to proper unit operation, efficiency and longevity. To assure equip­ment operates properly it must be properly main­tained. Equipment operation should be checked and verified several times during each year.

During regular unit inspection and maintenance. fol­low the guidelines below:

TROUBLESHOOTING

NOTES:

1. If circuit breaker is tripped, fuse is blown or RESET button on cord or plug is tripped more than once, contact a qualified electrician.
2. If unit is Installed where condensation drainage could drip in an undesirable location, an accessory drain kit should be installed and connected to drain system.

ACCESSORIES

Carrier
Packaged Terminal
Air Conditioner Warranty
FULL ONE-VEAR WARRANTY – During the first year after purchase, CARRIER will, through Its authorized independent servicing dealers or service stations., and free of charge to the user or subsequent users, repair or replace any parts which are defective In material or workmanship. The replacement part can be a new or remanufactured part as provided at CARRIER’S sole option.

FULL EXTENDED FOUR-VEAR WARRANTY ON SEALED REFRIGERATION SYSTEM ONLY – During the second through fifth years_ after date of original pur­chase, CARRIER will, through Its authorized servicing dealers and service stations and free of charge to the end user or subsequent users, repair or replace the compressor, condenser, evaporator or connecting tubing if defective in material or workmanship. This includes system refrigeration charge. The replacement part can be new or e remanufactured part as provided at CARRIER’S sole option.

LIMITED EXTENDED FOUR-VEAR WARRANTY ON NON-SEALED REFRIOER· ATION SYSTEM ONLY – During the second through fifth years after date of origi­nal purchase, Carrier will, through Its authorized servicing dealers and service stations end free of charge to the end user or subsequent users, repair or replace any non-sealed system part (motor, solenoid, thermistor, thermostat, relays, switch, capacitor, overload, drain valve, bulb heater, fan, stator) If defective in material or workmanship. The replacement part can be new or a remanufactured pert at CARRIER’S sole option. THIS LIMITED WARRANTY DOES NOT INCLUDE LABOR, user ls responsible for labor, Including cost of diagnosis of problem, removal and transportation of the air conditioner to and from the service center, and reinstallation charges necessary to accomplish repair.

LIMITATION OF WARRANTIES – ALL IMPLIED WARRANTIES (INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY) ARE HEREBY LIMITED IN DURATION TO THE PERIOD FOR WHICH EACH LIMITED WARRANTY IS GIVEN AND APPLIES. SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS, SO THE ABOVE LIMITATION MAY NOT APPLY TO VOU. THE EXPRESSED WARRANTIES MADE IN THIS WARRANTY ARE EXCLUSIVE AND MAY NOT BE ALTERED, ENLARGED, OR CHANGED BY ANY DISTRIBUTOR, DEALER, OR OTHER PERSON WHATSOEVER. ALL WORK UNDER THE TERMS OF THIS WARRANTY SHALL BE PERFORMED DURING NORMAL WORKING HOURS. ALL REPLACEMENT PARTS, WHETHER NEW OR REMANUFACTURED, ASSUME AS THEIR WARRANTY PERIOD ONLY THE REMAINING TIME PERIOD OF THIS WARRANTY.

CARRIER WILL NOT BE RESPONSIBLE FOR:

1. CLEANING REQUIRED PRIOR TO WARRANTY REPAIR.
2. Standard maintenance, cleaning or damage resulting from failure to perform normal maintenance as outlined In the owner’s manual.
3. Instruction on methods of control and use of air conditioning unit after Initial installation.
4. Damage or repairs needed as a consequence of faulty installation or application. This Is the responsibility of the installer.
5. Failure to start due to voltage conditions, blown fuses, open circuit breakers or any other damages due to the Inadequacy or interruption of electrical services.
6. Damage or repairs needed as a consequence of any misapplication, abuse, unauthorized alteration, Improper servicing or operation.
7. Damage as a result of floods, winds, fires, lightning, accidents, corrosive environment, or other conditions beyond the control of CARRIER. EXCEPTION TO CORROSIVE ENVIRONMENT IN ABOVE PARAGRAPH – Packaged terminal units (52 Series) built with corrosion protection are exempt from the exclusion – “Corrosive Environment.” The unit model number is Identified on the nameplate with a CP suffix.
8. Reimbursement for replacement perts or repair services which are not sup­plied or designated by CARRIER and which are specifically covered under this warranty.
9. CARRIER products installed outside the continental U.S.A., Alaska, Hawaii and Canada.
10. Shipping damage or damage as a result of transporting the unit. This Is the responsibility of the selling dealer or the authorized Room Air Conditioner service s1ation.
11. ANY SPECIAL, INDIRECT OR CONSEQUENTIAL PROPERTY OR COM­MERCIAL DAMAGE OF ANY NATURE WHATSOEVER. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you.
12. Warranty coverage of accessory items (wall thermostats, wall sleeves, etc.).

NOTE: Service and Maintenance Items excluded in this warranty may be covered by a separate service agreement through the seller at time of purchase.

Authorized independent dealers or service stations are registered with Carrier Air Conditioning through Its distributor organization.

This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.

Carrier Corporation

IF YOUR AIR CONDITIONER DOES NOT WORK, FOLLOW THESE STEPS IN ORDER:

1. CHECK THE THINGS YOU CAN DO YOURSELF. These include being sure the air conditioner Is plugged in firmly in an appropriate receptacle, checking the fuse or circuit breaker and ensuring its re­placement or resetting, necessary, and rereading the instruction book to ensure that all controls are set properly. By doing this you can save money. Many unnecessary service calls in the service man doing what the owner can do for him or herself.
2. CONTACT YOUR DEALER OR THE RECOMMENDED CARRIER AUTHORIZED SERVICE CENTER. They have been set up to handle the great majority of all possible service problems. The quickest, surest and best way to get your air conditioner back In service Is to use this step before proceeding further.
3. CONTACT THE CARRIER DISTRIBUTOR SERVING YOUR AREA. Your dealer can provide the distributor’s name or you can consult your yellow pages.
4. CONTACT CARRIER IF A SATISFACTORY SOLUTION IS NOT REACHED IN STEPS 2 ANO 3.

Carrier Air Conditioning Consumer Relations Department Carrier Parkway, P.O. Box 4808 Syracuse, New York 13221 Telephone: 1-800-£94-6449

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