Carrier PAD424-60 Installation Instructions Manual
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Carrier PAD424-60 Installation Instructions Manual

Carrier PAD424-60 Installation Instructions Manual

R--410a single package electric cooling
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INSTALLATION INSTRUCTIONS
R- -410A Single Package Electric Cooling
These instructions must be read and understood completely before attempting installation
DANGER, WARNING, CAUTION, and NOTE
The signal words DANGER, WARNING,
CAUTION, and NOTE are used to identify levels
of hazard seriousness. The signal word DANGER
is only used on product labels to signify an
immediate hazard. The signal words WARNING,
CAUTION, and NOTE will be used on product
labels and throughout this manual and other
manual that may apply to the product.
DANGER -- Immediate hazards which will result in
severe personal injury or death.
WARNING --Hazards or unsafe practices which
could result in severe personal injury or death.
CAUTION -- Hazards or unsafe practices which
may result in minor personal injury or product or
property damage.
NOTE -- Used to highlight suggestions which will
result in enhanced installation, reliability, or
operation.

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PAD424- -60
1 & 3 Phase
Safety Labeling and Signal Words
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Signal Words in Manuals
The signal word WARNING is used throughout
this manual in the following manner:
WARNING
!
The signal word CAUTION is used throughout
this manual in the following manner:
CAUTION
!
Signal Words on Product Labeling
Signal words are used in combination with
colors and/or pictures or product labels.
WARNING
!
2
2
PERSONAL INJURY, AND/OR PROPERTY
2
DAMAGE HAZARD
2
Failure to carefully read and follow this warning
could result in equipment malfunction, property
3
damage, personal injury and/or death.
3
Installation or repairs made by unqualified
3
persons could result in equipment malfunction,
7
property damage, personal injury and/or death.
7
The information contained in this manual is
9
intended for use by a qualified service technician
11
familiar with safety procedures and equipped
11
with proper tools and test instruments.
11
Installation must conform with local building
codes and with the national Electrical Code
12
NFPA70 current edition or Canadian Electrical
13
Code part 1 CSA C.22.1.
15
22
25
27
519 01 1803 00
04/21/10

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Summary of Contents for Carrier PAD424-60

  • Page 1: Table Of Contents

    INSTALLATION INSTRUCTIONS R- -410A Single Package Electric Cooling PAD424- -60 1 & 3 Phase These instructions must be read and understood completely before attempting installation Safety Labeling and Signal Words DANGER, WARNING, CAUTION, and NOTE The signal words DANGER, WARNING, Signal Words in Manuals CAUTION, and NOTE are used to identify levels The signal word WARNING is used throughout...

  • Page 2: Safety Considerations

    WARNING FIG. 1 - - UNIT PAD4 PERSONAL INJURY AND ENVIRONMENTAL HAZARD Failure to follow this warning could result in personal injury, and/or death. 1. Relieve pressure and recover all refrigerant before servicing existing equipment, and before final unit disposal. Use all service ports and open all flow--control devices, including solenoid valves.

  • Page 3: Step 3 - Provide Clearances

    includes roof curb adapter and gaskets for the perimeter seal and Particular attention should be paid to excessive wear at hoist duct openings. No additional modifications to curb are required hooking points and load support areas. Materials showing any when using this kit. kind of wear in these areas must not be used and should be discarded.
  • Page 4 Fig. 3 - - PAD4 2 to 3 Ton Unit Dimensions 519 01 1803 00...
  • Page 5 Fig. 4 - - PAD4 3.5 to 5 Ton Unit Dimensions 519 01 1803 00...
  • Page 6 FIG. 5 - - ROOF CURB DIMENSIONS Dashed lines show cross support location for large basepan units. HVAC unit HVAC unit basepan base rails Sealing Gasket Roofcurb Anchor screw Wood nailer* Flashing field supplied (field supplied) Roofing material field supplied Cant strip field supplied SMALL/COMMON CURB...

  • Page 7: Step 6 -- Provide For Condensate Disposal

    FIG. 6 - - RIGGING WEIGHTS CAUTION - NOTICE TO RIGGERS PRUDENCE - AVIS AUX MANIPULATEUR ACCESS PANELS MUST BE IN PLACE WHEN RIGGING. PANNEAUX D'ACCES DOIT ÊTRE EN PLACE POUR MANIPULATION. Use top skid as spreader bar. / Utiliser la palette du haut comme barre de répartition DUCTS MINIMUM HEIGHT: 36"...

  • Page 8: Electrical Shock Hazard

    IMPORTANT: Use flexible connectors between ductwork and unit WARNING to prevent transmission of vibration. Use suitable gaskets to ensure weather tight and airtight seal. When electric heat is ELECTRICAL SHOCK HAZARD installed, use fireproof canvas (or similar heat resistant material) connector between ductwork and unit discharge connection.

  • Page 9: Step 8 - Install Electrical Connections

    Step 8 — Install Electrical Connections 3. Locate the black and yellow wires connected to the line side of the contactor. CAUTION 4. Connect field L1 to black wire on connection 11 of the compressor contactor. UNIT COMPONENT DAMAGE HAZARD 5.

  • Page 10: Outdoor Fan

    Indoor Fan Board P4 connector. Factory wires are provided for Transformer Protection electric heat staging W1 and W2 (W2 and W3 on IFB). If room The transformer is of the energy--limiting type. It is set to withstand thermostat has only one stage of supplemental heat, connect a 30--second overload or shorted secondary condition.

  • Page 11: Pre--Start--Up

    PRE- -START- -UP 1. Locate leak and make sure that refrigerant system pressure has been relieved and reclaimed from both high-- and WARNING low--pressure ports. 2. Repair leak following accepted practices. FIRE, EXPLOSION, ELECTRICAL SHOCK HAZARD NOTE: Install a filter drier whenever the system has been opened Failure to follow this warning could result in personal injury, for repair.

  • Page 12: Airflow Adjustments

    1. Remove caps from low-- and high--pressure service fittings. shipped loose with vinyl caps and are located in the control box, near the interface fan board (IFB) (Fig. 11). 2. Using hoses with valve core depressors, attach low-- and high--pressure gauge hoses to low-- and high--pressure Single Cooling Fan Speed Set-up (Dehumidification feature service fittings, respectively.

  • Page 13: Cooling Sequence Of Operations

    7. Use any spare vinyl plugs to cap any unused speed tap Table 3 – Color Coding for Indoor Fan Motor Leads wires. Black = High Speed Orange = Med- -High Speed Fig. 11 - - Interface Fan Board (IFB) Red = Med Speed Pink = Med- -Low Speed HIGH...

  • Page 14: Motor Speed

    Table 4 – Dry Coil Air Delivery* - - Horizontal and Downflow Discharge - - Unit PAD4 EXTERNAL STATIC PRESSURE (IN. W.C.) UNIT SIZE MOTOR SPEED WIRE COLOR Blue Med-Low Pink Medium Med-High Orange 1009 High Black 1241 1167 1111 1036 Blue Med-Low...

  • Page 15: Wiring Diagram

    Fig. 12 - - Connection Wiring Diagram 208/230- -1- -60 IF USED FIELD SUPPLY POWER 11 21 UNIT ONLY MAXIMUM WIRE 23 23 SIZE 2 AWG. COMPRESSOR PLUG EQUIP_GND COMP FOR WIRING WITH ELECTRIC HEATERS SEE SCHEMATIC ON HEATER ACCESSORY. GRN-YEL 230 200 GRN/YEL...
  • Page 16 Fig. 13 - - Ladder Wiring Diagram 208/230- -1- -60 DANGER: ELECTRICAL SHOCK HAZARD DISCONNECT POWER BEFORE SERVICING IF USED COMP TRAN SEE NOTE 7 24VAC FUSE P1-1 P1-2 P1-3 P1-4 P1-5 P1-6 P1-7 P2-1 P2-2 P2-3 P2-4 C,TRAN ACCESSORY ELECTRIC HEAT P4-1 P4-2...
  • Page 17 Fig. 14 - - Connection Wiring Diagram 208/230- -3- -60 DANGER: ELECTRICAL SHOCK HAZARD DISCONNECT POWER BEFORE SERVICING SCHEMATIC IF USED 230-3-60 FIELD SUPPLY POWER UNIT ONLY FOR WIRING MAXIMUM WIRE WITH ELECTRIC SIZE 2 AWG. HEATERS SEE SCHEMATIC ON HEATER COMPRESSOR PLUG ACCESSORY.
  • Page 18 Fig. 15 - - Ladder Wiring Diagram 208/230- -3- -60 DANGER: ELECTRICAL SHOCK HAZARD DISCONNECT POWER BEFORE SERVICING IF USED COMP TRAN SEE NOTE 7 24VAC C,IFB FUSE P1-1 P1-2 P1-3 IY1/YI P1-4 P1-5 IY2/DHI P1-6 IW2I P1-7 IW3I P2-1 P2-2 P2-3 P2-4...
  • Page 19 Fig. 16 - - Connection Wiring Diagram 460- -3- -60 DANGER: ELECTRICAL SHOCK HAZARD DISCONNECT POWER BEFORE SERVICING SCHEMATIC IF USED 460-3-60 FOR WIRING WITH FIELD ELECTRIC HEATERS SUPPLY SEE SCHEMATIC POWER ON HEATER UNIT ONLY ACCESSORY. MAXIMUM WIRE SIZE 2 AWG. COMPRESSOR PLUG COMP EQUIP_GND...
  • Page 20 Fig. 17 - - Ladder Wiring Diagram 460- -3- -60 DANGER: ELECTRICAL SHOCK HAZARD DISCONNECT POWER BEFORE SERVICING IF USED COMP 460V TRAN 460V SEE NOTE 7 24VAC FUSE P1-1 P1-2 P1-3 IY1/YI P1-4 P1-5 IY2/DHI P1-6 IW2I P1-7 IW3I P2-1 P2-2 P2-3...
  • Page 21 Fig. 18 - - Cooling Charging Chart 519 01 1803 00...

  • Page 22: Maintenance

    MAINTENANCE For longer life, operating economy, and continuing efficiency, clean accumulated dirt and grease from the blower wheel and To ensure continuing high performance, and to minimize the motor annually. possibility of premature equipment failure, periodic maintenance must be performed on this equipment. This cooling unit should be WARNING inspected at least once each year by a qualified service person.
  • Page 23 Fig. 20 - - Fan Blade Position FAN GRILLE MOTOR MOTOR SHAFT MAX DISTANCE BETWEEN TOP OF FAN GRILLE AND BOTTOM OF FAN BLADE “A” SIZE Outdoor Coil, Indoor Coil, and Condensate Drain Pan 5. When replacing fan blade, position blade as shown in Fig. Inspect the condenser coil, evaporator coil, and condensate drain 6.
  • Page 24 REFRIGERANT CIRCUIT 1. Turn off all power to unit. 2. Disconnect leads on switch. Inspect all refrigerant tubing connections and the unit base for oil accumulations annually. Detecting oil generally indicates a 3. Apply ohmmeter leads across switch. You should have refrigerant leak.

  • Page 25: Liquid Line Filter Drier

    cracking) to occur in one year or more. When performing any LIQUID LINE FILTER DRIER service that may risk exposure of compressor oil to the roof, take The filter drier is specifically designed to operate with R--410A. appropriate precautions to protect roofing. Procedures which risk Use only factory--authorized components.
  • Page 26 Table 9 – Troubleshooting Chart SYMPTOM CAUSE REMEDY Power failure Call power company Fuse blown or circuit breaker tripped Replace fuse or reset circuit breaker Defective contactor, transformer, control relay, or high--pres- Replace component sure, loss--of--charge or low--pressure switch Compressor and outdoor fan will not start Insufficient line voltage Determine cause and correct Incorrect or faulty wiring...
  • Page 27 START- - UP CHECKLIST (Remove and Store in Job Files) I. PRELIMINARY INFORMATION MODEL NO.: SERIAL NO.: DATE: TECHNICIAN: II. PRESTART- -UP (Insert check mark in box as each item is completed) ( ) VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT ( ) REMOVE ALL SHIPPING HOLD DOWN BOLTS AND BRACKETS PER INSTALLATION INSTRUCTIONS ( ) CHECK ALL ELECTRICAL CONNECTIONS AND TERMINALS FOR TIGHTNESS ( ) CHECK THAT INDOOR (EVAPORATOR) AIR FILTER IS CLEAN AND IN PLACE...

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