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513 01 3103 00

SAFETY CONSIDERATIONS

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.
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.
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.

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. 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.

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or

death.
Before installing or servicing system, always turn off main

power to system and install lockout tag. There may be more

than one disconnect switch. Turn off accessory heater power

switch if applicable.

!

WARNING

PERSONAL INJURY AND ENVIRONMENTAL HAZARD

Failure to relieve system pressure 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.

2. Federal regulations require that you do not vent refrigerant

into the atmosphere. Recover during system repair or final unit

disposal.

WARNING

!

CUT HAZARD

Failure to follow this caution may result in personal injury.
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.

CAUTION

!

FIG. 1 -- UNIT PAD3

INTRODUCTION

The PAD3 units are fully self--contained and designed for outdoor

installation. (See Fig. 1.) All unit sizes have discharge openings

for both horizontal and downflow configurations, and are factory

shipped with all downflow duct openings covered. The unit may

be installed either on a rooftop or on a ground--level cement slab.

(See Fig. 6 for roof curb dimensions.)

RECEIVING AND INSTALLATION

Step 1 — Check Equipment

Identify Unit

The unit model number and serial number are stamped on the

unit identification plate. Check this information against shipping

papers.

Inspect Shipment

Inspect for shipping damage before removing packaging

materials. If unit appears to be damaged or is torn loose from its

anchorage, have it examined by transportation inspectors before

removal. Forward claim papers directly to transportation company.

Manufacturer is not responsible for any damage incurred in

transit. Check all items against shipping list. Immediately notify the

nearest equipment distributor if any item is missing. To prevent

loss or damage, leave all parts in original packages until

installation.

Step 2 — Provide Unit Support

IMPORTANT

: The unit must be secured to the curb by installing

screws through the bottom of the curb flange and into the unit
base rails. When installing large base units onto the common
curb, the screws must be installed before allowing the full weight
of the unit to rest on the curb. A minimum of six screws are
required for large base units. Failure to secure unit properly could
result in an unstable unit. See Warning near Rigging/Lifting
information and accessory curb instructions for more details.
For hurricane tie downs, contact distributor for details and PE

(Professional Engineering) Certificate if required.

Roof Curb

Install accessory roof curb in accordance with instructions

shipped with curb (See Fig. 6). Install insulation, cant strips,

roofing, and flashing. Ductwork must be attached to curb.

Summary of Contents for PAD324

Page 1: ...roduct Labeling Signal words are used in combination with colors and or pictures or product labels SAFETY CONSIDERATIONS 2 RECEIVING AND INSTALLATION 2 Step 1 Check Equipment 2 Step 2 Provide Unit Support 2 Step 3 Provide Clearances 3 Step 4 Field Fabricate Ductwork 3 Step 5 Rig and Place Unit 3 Step 6 Provide for Condensate Disposal 7 Step 7 Install Duct Connections 7 Step 8 Install Electrical Co...

Page 2: ...ns require that you do not vent refrigerant into the atmosphere Recover during system repair or final unit disposal WARNING CUT HAZARD Failure to follow this caution may result in personal injury 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 extreme...

Page 3: ... unit For horizontal applications unit is provided with flanges on the horizontal openings All ductwork should be secured to the flanges Insulate and weatherproof all external ductwork joints and roof openings with counter flashing and mastic in accordance with applicable codes Ducts passing through an unconditioned space must be insulated and covered with a vapor barrier If a plenum return is use...

Page 4: ... 1 16 13 16 427 0 36 208 230 1 60 208 230 3 60 283 128 3 46 1172 20 1 2 520 7 15 3 4 400 1 17 431 8 460 3 60 297 134 6 46 1172 20 1 2 520 7 15 3 4 400 1 17 431 8 UNIT Voltage Corner Weight LB KG 1 2 3 4 24 208 230 54 4 24 7 43 5 19 7 65 2 29 6 108 7 49 3 30 208 230 55 4 25 1 44 3 20 1 66 4 30 2 110 7 50 3 36 208 230 56 6 25 7 45 2 20 5 67 9 30 8 113 1 51 3 460 56 6 25 7 45 2 20 5 76 9 34 9 118 1 5...

Page 5: ...1187 20 1 4 514 4 17 1 2 444 5 17 3 8 441 60 208 230 1 60 208 230 3 60 397 180 2 46 3 4 1187 20 1 4 514 4 17 1 2 444 5 17 5 8 448 460 3 60 411 186 5 46 3 4 1187 20 1 4 514 4 17 1 2 444 5 17 5 8 448 UNIT Voltage Corner Weight LB KG 1 2 3 4 42 208 230 73 8 33 5 59 1 26 8 88 6 40 2 147 7 67 1 460 73 8 33 5 59 1 26 8 97 6 44 3 1527 69 3 48 208 230 75 0 34 1 60 0 27 3 90 1 40 9 150 1 68 1 460 75 0 34 1...

Page 6: ...UMBER A IN mm B small base IN mm B large base IN mm C IN mm D IN mm E IN mm F IN mm G IN mm H IN mm Small or Large CPRFCURB010A00 11 279 10 254 14 356 16 406 47 8 1214 32 4 822 2 7 69 30 6 778 46 1 1170 CPRFCURB011A00 14 356 Large CPRFCURB012A00 11 279 14 356 43 9 1116 42 2 1072 CPRFCURB013A00 14 356 Part Numbers CPRCURB010A00 and CPRCURB011A00 can be used on both small and large basepan units The...

Page 7: ...terials are rated to hold the weight of the unit See Fig 7 3 Attach a clevis of sufficient strength in the middle of the straps Adjust the clevis location to ensure unit is lifted level with the ground After the unit is placed on the roof curb or mounting pad remove the top skid Step 6 Provide for Condensate Disposal NOTE When installing condensate drain connection be sure to comply with local cod...

Page 8: ...or maintenance operations on the system turn off main power to unit and install lockout tag WARNING 1 Open all electrical disconnects and install lockout tag before starting any service work 2 Remove horizontal metal ductcovers to access vertical downflow discharge duct knockouts in unit basepan See Fig 9 3 To remove downflow return and supply knockout covers break front and right side connecting ...

Page 9: ...to the line side of the contactor 4 Connect field L1 to black wire on connection 11 of the compressor contactor 5 Connect field wire L2 to yellow wire on connection 23 of the compressor contactor Three phase units 1 Run the high voltage L1 L2 L3 and ground lead into the control box 2 Connect ground lead to chassis ground connection 3 Locate the black and yellow wires connected to the line side of ...

Page 10: ...1 21 11 9 1 21 15 4 1 21 13 6 1 21 15 5 2 21 15 5 OUTDOOR FAN Nominal Cfm Diameter in Diameter mm Motor Hp Rpm 2800 24 610 1 5 810 3000 24 610 1 5 810 3200 24 610 1 5 810 3600 26 660 1 5 810 4000 26 660 1 5 810 3200 26 660 1 5 810 INDOOR COIL Rows Fins in Face Area sq ft 2 17 3 7 3 17 3 7 3 17 3 7 3 17 4 7 3 17 4 7 3 17 5 7 INDOOR BLOWER Nominal Cooling Airflow Cfm Size in Size mm Motor HP RPM 800...

Page 11: ...refrigerant vapor to system and leak test unit 4 Recover refrigerant from system and evacuate to 500 microns if no additional leaks are found 5 Charge unit with R 410A refrigerant using an accurate scale Refer to unit rating plate for required charge Step 2 Start Up Cooling Section And Make Adjustments Complete the required procedures given in the Pre Start Up section before starting the unit Do n...

Page 12: ...cation feature not used To change cooling speed 1 Remove the vinyl cap off of the desired speed tap wire Refer to Table 3 for color coding Add the wet coil pressure drop in Table 5 to the system static to determine the correct cooling airflow speed in Table 4 that will deliver the nominal cooling airflow as listed in Table 1 for each size 2 Remove the current speed tap wire from the LOW terminal o...

Page 13: ...ging blower speed WARNING Continuous Fan Operation When the DEHUM feature is not used the continuous fan speed will be the same as cooling fan speed When the DEHUM feature is used the continuous fan will operate on IFB LOW speed when the DH control lead is not energized or IFB HIGH speed when the DH lead is energized See Figure 11 COOLING SEQUENCE OF OPERATION With the room thermostat SYSTEM switc...

Page 14: ...tic pressure available for ducting Shaded areas indicate airflows that are not recommended for dehumidification control Table 5 PAD3 Wet Coil Pressure Drop in W C UNIT SIZE STANDARD CFM S C F M 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 24 0 030 0 037 0 044 0 053 0 063 30 0 037 0 044 0 053 0 063 0 072 0 081 0 105 36 0 055 0 060 0 090 0 100 0 110 0 140 42 0 045 0 050 0 0...

Page 15: ...TION OF SPEED TAPS MA WHEN USING FIELD INSTALLED CONSULT INSTALLATION INSTRU DETERMINE CORRECT SPEED TAP 6 DO NOT DISCONNECT PLUG UND 7 THIS FUSE IS MANUFACTURED B 8 UNIT FACTORY SHIPPED IN STD ACCESSSORY ELECTRIC HEAT HR1 5 KW HR1 2 10 KW HR1 2 3 15 KW HR1 2 3 4 20 KW HR3 HR2 HR4 1 3 HR1 1 3 BRN BRN BRN BRN BRN RED BLK YEL FIELD SUPPLY POWER UNIT ONLY MAXIMUM WIRE SIZE 2 AWG 1 1 OFM COMPRESSOR PL...

Page 16: ...L C G Y BLK RED BRN YEL GRN WHT VIO P1 7 P1 5 P1 6 P1 4 P1 3 P1 2 P1 1 P2 4 P2 3 P2 2 P2 1 C C1 C2 HR1 HR4 HR2 HR3 BRN BRN BRN BRN WHT VIO PNK GRY 2 5 4 3 1 BLU PNK RED BLK G Y HIGH C P4 4 P4 3 P4 2 P4 1 P4 5 IFB RED 24VAC IF USED ACCESSORY ELECTRIC HEAT G Y RED BRN WHT VIO PNK GRY R C Y G W2 W3 Y YEL ORN SEE NOTE 4 50VL500269 DANGER ELECTRICAL SHOCK HAZARD DISCONNECT POWER BEFORE SERVICING BLU C ...

Page 17: ...DISCONNECT PLUG UNDER LOAD I 7 THIS FUSE IS MANUFACTURED BY LITTELFUSE P N 257003 8 DEHUM FEATURE CANNOT BE USED WHEN ECONOMIZER IS INSTALLED UNIT FACTORY SHIPPED IN STD MODE HR3 HR2 HR4 HR1 BRN BRN BRN BRN BRN RED BLK YEL FIELD SUPPLY POWER UNIT ONLY MAXIMUM WIRE SIZE 2 AWG 1 1 SCHEMATIC 230 3 60 OFM COMPRESSOR PLUG EQUIP_GND 1 1 1 1 1 WHT VIO PNK GRY BRN WHT VIO PNK GRY BRN BRN IFB 24V SPLICE DI...

Page 18: ...2 4 P2 3 P2 2 P2 1 HR1 HR4 HR2 HR3 BRN BRN BRN BRN WHT VIO PNK GRY 2 5 4 3 1 BLU PNK RED BLK HIGH P4 4 P4 3 P4 2 P4 1 P4 5 IFB RED 24VAC IF USED ACCESSORY ELECTRIC HEAT G Y RED BRN WHT VIO PNK GRY R C Y1 G W2 W3 50VL500270 YEL L2 DANGER ELECTRICAL SHOCK HAZARD DISCONNECT POWER BEFORE SERVICING TRAN BRN C C2 Y C 13 FUSE 3A BRN C SEE NOTE 7 3 5 6 4 2 8 7 ECON HARNESS GRY Y2 YEL RED BLK PNK BLU PNK B...

Page 19: ...R LOAD I 7 THIS FUSE IS MANUFACTURED BY LITTELFUSE P N 257003 8 THESE FUSES ARE MANUFACTURED BY COOPER BUSSMAN P N FNQ R 5 9 DEHUM FEATURE CANNOT BE USED WHEN ECONOMIZER IS INSTALLED UNIT FACTORY SHIPPED IN STD MODE ACCESSSORY ELECTRIC HEAT HR1 5 KW HR1 2 10 KW HR1 2 3 15 KW HR1 2 3 4 20 KW HR3 HR2 HR4 1 3 HR1 1 3 BRN BRN BRN BRN BRN RED BLK YEL FIELD SUPPLY POWER UNIT ONLY MAXIMUM WIRE SIZE 2 AWG...

Page 20: ...P2 1 HR1 HR4 HR2 HR3 BRN BRN BRN BRN WHT VIO PNK GRY 2 5 4 3 1 BLU PNK RED BLK G Y HIGH C P4 4 P4 3 P4 2 P4 1 P4 5 IFB RED 24VAC IF USED ACCESSORY ELECTRIC HEAT G Y RED BRN WHT VIO PNK GRY R C Y1 G W2 W3 50VL500271 YEL L2 ORN SEE NOTE 4 DANGER ELECTRICAL SHOCK HAZARD DISCONNECT POWER BEFORE SERVICING TRAN BRN C C2 Y C 13 FUSE 3A BRN C BRN SEE NOTE 7 C1 3 5 6 4 2 8 7 ECON HARNESS VIO Y2 YEL RED BLK...

Page 21: ...21 513 01 3103 00 Fig 18 Cooling Charging Chart ...

Page 22: ...e dimensional size and type as originally installed See Table 1 for recommended filter sizes Inspect air filter s at least once each month and replace throwaway type or clean cleanable type at least twice during each cooling season and twice during the heating season or whenever the filter becomes clogged with dust and lint INDOOR BLOWER AND MOTOR NOTE All motors are pre lubricated Do not attempt ...

Page 23: ...ser fan free from all obstructions to ensure proper cooling operation Never place articles on top of the unit CAUTION 1 Remove 6 screws holding condenser grille and motor to top cover 2 Turn motor grille assembly upside down on top cover to expose the fan blade 3 Inspect the fan blades for cracks or bends 4 If fan needs to be removed loosen the setscrew and slide the fan off the motor shaft 5 When...

Page 24: ...ondenser air recirculation To check switch 1 Turn off all power to unit 2 Disconnect leads on switch 3 Apply ohmmeter leads across switch You should have continuity on a good switch COPELAND SCROLL COMPRESSOR R 410A REFRIGER ANT The compressor used in this product is specifically designed to operate with R 410A refrigerant and cannot be interchanged The compressor is an electrical as well as mecha...

Page 25: ...Refer to the Troubleshooting Chart Table 9 for troubleshooting information START UP CHECKLIST Use the Start Up Checklist at the back of this manual AIR CONDITIONER WITH R 410A QUICK REFERENCE GUIDE R 410A refrigerant operates at 50 70 percent higher pressures than R 22 Be sure that servicing equipment and replacement components are designed to operate with R 410A R 410A refrigerant cylinders are r...

Page 26: ...ate Defective compressor Replace and determine cause Insufficient line voltage Determine cause and correct Blocked outdoor coil Determine cause and correct Defective run start capacitor overload or start relay Determine cause and replace Faulty outdoor fan motor or capacitor Replace Restriction in refrigerant system Locate restriction and remove Compressor operates continuously Dirty air filter Re...

Page 27: ...S CHECK THAT INDOOR EVAPORATOR AIR FILTER IS CLEAN AND IN PLACE VERIFY THAT UNIT INSTALLATION IS LEVEL CHECK FAN WHEEL AND PROPELLER FOR LOCATION IN HOUSING ORIFICE AND SETSCREW TIGHTNESS III START UP ELECTRICAL SUPPLY VOLTAGE COMPRESSOR AMPS INDOOR EVAPORATOR FAN AMPS TEMPERATURES OUTDOOR CONDENSER AIR TEMPERATURE DB RETURN AIR TEMPERATURE DB WB COOLING SUPPLY AIR DB WB PRESSURES REFRIGERANT SUCT...

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