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Related Manuals for Dunham-Bush R22 WCPS-B Series
Summary of Contents for Dunham-Bush R22 WCPS-B Series
- Page 1 Form No: MM0214A / MM0215A ® Products That Perform . . .By People Who Care W ater- Co oled Single Package Air-Conditioner with Scoll Compressors R22 / R407C 50 / 60 Hz WCPS-B Series...
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Page 2: Table Of Contents
TABLE OF CONTENTS MANUAL INDEX PAGE 1.0 INTRODUCTION ................................... 2.0 GENERAL INFORMATION SAMPLE NOMENCLATURE ..............................4 RECEIVING, INSPECTION AND PACKAGING........................4 RIGGING AND UNCRATING..............................5 LIMITATIONS..................................5 3.0 INSTALLATION FOUNDATION ..................................6 ( i.) Provide A Separate Floating Plinth..........................6 ( ii.) Place The Unit On A Minimum 2½”... -
Page 3: Introduction
Every Dunham-Bush water-cooled single package air-conditioner has been carefully and intelligently designed, manufactured and tested. It is also subject to stringent quality control and accurately tested as a final verification of reliability. -
Page 4: General Information
2.0 GENERAL INFORMATION 2.1 SAMPLE NOMENCLATURE 6 WCP S 640 B Q P Blank - R22 Blank - 50Hz - R407c - 60Hz Blank - Standard - Special Water Cooled Packaged Generation S - Scroll Compressor R - Reciprocating Model Code Compressor 2.2 RECEIVING, INSPECTION AND PACKAGING As soon as the unit is received, it should be inspected for any damage during transit. -
Page 5: Rigging And Uncrating
2.0 GENERAL INFORMATION 2.) Supply air plenum. 3.) Return air grille and integral filter frame. 4.) Hot water heating coils or electric reheaters. 5.) Compressor time delay relay. 6.) Factory wired starter board. 7.) Hot gas by pass, oil separator and suction accumulator. 8.) Copper, hydrophilic fins or tinned coated copper fins. -
Page 6: Installation
3.0 INSTALLATION 3.1 FOUNDATION The unit shall be placed on a flat, level, solid foundation ( plinth ) or floor capable of supporting the weight of the unit. No special foundation or vibration isolator is generally required as the vibration transmitted from the units casing will not adversely effect the surrounding. -
Page 7: Iii.) Support The Complete Unit On Spring Isolators. Request Factory To Provide Correct Spring Isolators And Mounting Brackets At Base Units
3.0 INSTALLATION iii.) Support the complete unit on spring isolators. Request factory to provide correct spring isolators and mounting brackets at base units. WCPS-B FACTORY PROVIDED MOUNTING BRACKETS 2" DEFLECTION SPRING ISOLATORS NON-SKID NEOPRENE PAD 6-1/2" 1" FLOOR 3.2 LOCATIONS The recommended location for the units to facilitate operation and reduce cost is to locate it: 1.) Near power supply source 2.) Near drain source... -
Page 8: Figure 3.3A: For Units With Single Side Return Air, Wcps 68B To 570B
3.0 INSTALLATION FIGURE 3.3A: FOR UNITS WITH SINGLE SIDE RETURN AIR, WCPS 68B TO 570B Side Recommended Remark Minimum Clearance 1.) Return air, front 48" For proper air intake to the condenser coil. 2.) Rear (Vertical discharge) For access to compressors, controls, filter drier, sight glass, fan motor and drive assembly. -
Page 9: Figure 3.3B: For Units With Single Side Return Air, Wcps 640B To 1520B
3.0 INSTALLATION FIGURE 3.3B: FOR UNITS WITH SINGLE SIDE RETURN AIR, WCPS 640B TO 1520B Side Recommended Remark Minimum Clearance 1.) Return air, front 48" For proper air intake to the condenser coil. 2.) Rear 48" For access to compressors, controls, filter drier, sight glass, (Vertical discharge) fan motor and drive assembly. -
Page 10: Unpacking And Uncrating
( or order form ) to the factory. Avoid field conversion of blower discharge pattern! If field conversion of the blower discharge pattern is required, contact factory or nearest Dunham-Bush representative, and the field conversion should only be carried out under the supervision of a factory authorized personnel. -
Page 11: Figure 3.5.1: Blower Discharge Pattern
3.0 INSTALLATION FIGURE 3.5.1: BLOWER DISCHARGE PATTERN 1. WCPS 68B to 570B PATTERN NO: 1 PATTERN PATTERN PATTERN NO: 2 NO: 3 NO: 4 2. WCPS 640B to 1520B PATTERN NO: 1 PATTERN NO: 2 PATTERN NO: 3 PATTERN NO: 4... -
Page 12: Evaporator Section
5.) Fans rpm shall be selected within the range of the Blower Performance Table. For operation outside the Blower Performance Table, consult factory or nearest Dunham-Bush representative. -
Page 13: Condenser Section
3.0 INSTALLATION 3.7 CONDENSER SECTION 1.) All internal condenser water piping is completely factory assembled and pressure tested at 300 psig for leakage. The condenser is designed to withstand a working pressure of 175 psig on the waterside. 2.) The standard units condenser and drain connections are on the right hand side viewing from the front side (i.e. -
Page 14: Figure 3.8A: Cooling Tower Water Piping Schematic
3.0 INSTALLATION FIGURE 3.8A: COOLING TOWER WATER PIPING SCHEMATIC Figure 3.8B shows the suggested wiring arrangement necessary to interconnect the unit, pump and tower fan motor. The entire system starts and stops automatically. Figure 3.8C shows an alternate wiring arrangement. Each unit is individually controlled by its room thermostat. -
Page 15: Operation
4.0 OPERATION 4.1 SYSTEM CAPACITY An accurate load calculation is essential because selection of units is based on the required total and sensible load at the specified conditions (i.e. Water temperature off condenser, DB/WB F air on evaporator coil). Undersizing the unit might cause premature failure (Due to overloading of compressor) and the room design condition will not be attained. -
Page 16: Temperature Setting
4.0 OPERATION 4.4 TEMPERATURE SETTING Normally the temperature setting for, a.) Cooling is 75-80°F b.) Heating is 70°F ( If heating coil is available ). 4.5 PHASE ROTATION If during initial start up the compressor does not build up pressure, noise is abnormally load and power consumption is minimal, then there is a possibility that the unit is operating in reverse rotation. -
Page 17: Refrigerant Circuit And Components
4.0 OPERATION 4.8 REFRIGERANT CIRCUIT AND COMPONENTS FIGURE 4.8: TYPICAL REFRIGERANT PIPING AND COMPONENTS AIR OFF COIL RETURN AIR Evaporator Coil 11. Liquid Line Filter Drier Thermo Expansion Valve 12. High Pressure Switch Sensing Bulb for TX Valve 13. Hot Discharge Piping Brass Distributor 14. -
Page 18: Typical Operating Sequence Flow Chart
4.0 OPERATION 4.9 TYPICAL OPERATING SEQUENCE FLOW CHART AUTO START OKAY CHECK ALL SWITCHES TO AUTO POSITION AND POWER SUPPLY OKAY PUSH START BUTTON (BLOWER FAN) OKAY OVERLOAD RELAY AND SAFETY INTERLOCK OKAY TRIP CHECK FUSE, START SIGNAL, SWITCHES, BLOWER START OVERLOAD RELAY, KEY SWITCH AND INTERLOCKING OKAY BLOWER RUN... -
Page 19: Start Up Checklist
4.0 OPERATION 4.10 START- UP CHECK LIST DUNHAM-BUSH INDUSTRIES SDN BHD Customer Order No: ........Lot 5755-6, Kidamai Industrial Park, Bukit Angkat, 43000 Kajang, Selangor Darul Ehsan. Malaysia. Order No: ............Serial No: ............Unit Model No: ..........Job Name: ............ -
Page 20: Typical Wiring Schematic Without Starter
4.0 OPERATION 4.11 TYPICAL WIRING SCHEMATIC WITHOUT STARTER 4.12 TYPICAL WIRING SCHEMATIC WITH DOL... -
Page 21: Typical Wiring Schematic With Autotrans
OPERATION 4.13 TYPICAL WIRING SCHEMATIC WITH AUTOTRANS... -
Page 22: Maintenance
5.0 MAINTENANCE 5.1 GENERAL As with all mechanical equipment's, a program of regular inspection, cleaning and preventive maintenance by trained personnel will contribute greatly to a long satisfactory service life of this equipment. 5.2 SCHEDULE OF INSPECTION AND MAINTENANCE The following schedule is only meant to be a guide. Actual maintenance schedule for each installation shall depend on the duty usage, the cleanliness of the surrounding environment, the city water supply and the cleanliness of the spaced to be conditioned. -
Page 23: Condenser Maintenance
5.0 MAINTENANCE could indicate potential imminent breakdowns. Essential system parameters includes discharge head pressure, saturated suction pressure, superheated suction temperature, superheated discharge temperature, liquid line temperature, pressure drop across condenser, condenser inlet and outlet temperatures, compressor(s) running amperes and incoming voltage. If any of these essential system parameters are out of range, shut down the unit, determine causes of malfunction or faults and take remedial actions. -
Page 24: Tube Replacement
If your water-cooled condenser ever experience a tube failure, the tube can be replaced without removing the vessel from its installed location (provided tube removal space is available). Please contact Dunham-Bush Sales representative if tube replacement is required. 5.4 WATER TREATMENT... -
Page 25: Pulley Alignment
5.0 MAINTENANCE 5.6 PULLEY ALIGNMENT 1.) Insert one end of the string inside the gap between belt and pulley. 2.) Rotate the pulley so that string is clipped between the pulley and the belt. 3.) Pull the other end of the string as per Figure 5.6. 4.) Inspect for any gap between the string and pulley at A and B. - Page 26 5.0 MAINTENANCE Figure 5.7: Belt Span 6.) Compare the force you have applied with the values in table 5.7B. Note: A new drive should be tensioned to the higher value. After the drive has been running for 30 minutes, the tension should be checked and readjusted to a higher value, if necessary. Table 5.7A: Belt Span Lt (cm) Deflection Td (cm)
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Page 27: Troubleshooting Chart
5.0 MAINTENANCE 5.8 TROUBLESHOOTING CHART LOW SUCTION PRESSURE REPLACE FILTER DRIER, CLOGGED LIQUID FILTER DRIER EVACUATE AND CHARGE NEW REFRIGERANT SIGHTGLASS LOW REFRIGERANT CHARGE ADD THE REFRIGERANT REMOVE THE RESTRICTION RESTRICTED LIQUID LINE CLOGGED AIR FILTER CLEAN THE AIR FILTER LOOSE FAN BELT ADJUST THE BELT TENSION RESTRICTED DUCT... - Page 28 5.0 MAINTENANCE INSUFFICIENT COOLINNG REPAIR OR REPLACE THE THERMOSTAT FAULTY ELEMENTS THERMOSTAT SEE "HIGH DISCHARGE PRESSURE" HIGH DISCHARGE PRESSURE OR OR "LOW SUCTION PRESSURE" LOW SUCTION PRESSURE HIGH DISCHARGE PRESSURE SPACE LOAD TOO BIG ADD ADDITTIONAL UNIT TOO HIGH RETURN AIR POOR DUCT INSULATION INSULATE AND REPAIR DUCT TEMPERATURE...
- Page 29 5.0 MAINTENANCE NO COOLING COMPRESSOR-MOTOR MALFUNCTION REPLACE COMPRESSOR REPLACE COMPRESSOR LOCKED COMP. MOTOR OR PARTS UNIT POWER SUPPLY NO VOLTAGE OR LOW VOLTAGE OBTAIN CORRECT VOLTAGE WRONG PHASE RECONNECT POWER LINE REPAIR OR REPLACE THE SHORTED COMPONENTS COMPONENTS FUSE FOR EVAP. CIRCUIT LOOSE CONNECTIONS TIGHTEN THE CONNECTION...
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Page 30: Sample Log Sheet
5.0 MAINTENANCE SAMPLE LOG SHEET SHEET NO......DUNHAM-BUSH WATER COOLED PACKAGE UNIT UNIT MODEL NO............UNIT NO........VOLTS: ......Hz ..... UNIT SERIAL NO........................START UP : DATE..........TIME........... DATE TIME COMP NO. SUCTION PRESSURE SUCTION TEMP. DISCHARGE PRESSURE DISCHARGE TEMP. DISCHARGE SUPERHEAT (DISCH.
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