Unique WS Series Service Manual
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Unique WS Series Service Manual

Ws series package units and split system water source air conditioners with r410a refrigerant
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Summary of Contents for Unique WS Series

  • Page 1: Service Manual

    Service Manual Advanced air conditioning systems...

  • Page 3: Table Of Contents

    Advanced air conditioning systems Series Contents SAFETY FIRST! ………………………………………………………………… INTRODUCTION ……………………………………………………………….. TECHNICAL DATA TABLES ……………...…………………………………. WATER SOURCE CONSOLE UNITS ………………………………………... SPLIT CONDENSER UNITS ..…………………………………………………. HEATING ELEMENT RECOMMENDATIONS …………………………….. REFRIGERATION CYCLE DIAGRAMS ……………………………………. INSTALLATION INSTRUCTIONS …………………………………………... INSTALLING THE CONTROL SYSTEM AND CONNECTING POWER... ELECTRICAL WIRING DIAGRAMS ………………………………………...

  • Page 4: Safety First

    UNIQUE products are designed for HVAC use. Using this equipment for any other purpose or in a way not within the operation recommendations specified in this manual will void the warranty and may cause injury.

  • Page 5: Introduction

    Unique-WS air conditioners are operating with water cooled condensing unit and can be utilized in applications such as residential, industrial and commercial buildings, offices, schools and other facilities. The operation of Unique-WS air conditioners is quiet and durable with low maintenance requirements and provides efficient year-round cooling and heating.
  • Page 6 Advanced air conditioning systems Series 1.2 Manufacturing Options WS air conditioners are available in horizontal or vertical execution. Standard layout includes SL, SR, FL and FR setup. Additional configurations are available upon request.

  • Page 7: Nameplate Information

    Advanced air conditioning systems Series 1.3 Nameplate Information Technical information for a specific unit appears on the unit nameplate, which is attached to the indoor and/or the outdoor units. The unit nameplate includes the following information: MODEL Air-conditioner model name CLIMATE CLASS Class T1 –...

  • Page 8: Technical Data Tables

    3. Net static pressure available at fan discharge at nominal capacity. 4. Available also in 400/3/50. Data applicable for R410A. For additional information contact Unique ltd. Product specifications are subject to change without notice. Appearance of products may differ slightly from catalog.
  • Page 9 3. Net static pressure available at fan discharge at nominal capacity. 4. Available also in 400/3/50. Data applicable for R410A. For additional information contact Unique ltd. Product specifications are subject to change without notice. Appearance of products may differ slightly from catalog.
  • Page 10 3. Net static pressure available at fan discharge at nominal capacity. 4. Available also in 400/3/50. Data applicable for R410A. For additional information contact Unique ltd. Product specifications are subject to change without notice. Appearance of products may differ slightly from catalog.

  • Page 11: Water Source Console Units

    3. Net static pressure available at fan discharge at nominal capacity. 4. Available also in 400/3/50. Data applicable for R410A. For additional information contact Unique ltd. Product specifications are subject to change without notice. Appearance of products may differ slightly from catalog.

  • Page 12: Split Condenser Units

    WS-102 750x550x610 1/2" 7/8" WS-120 850x550x630 5/8" 1⅛" 1½" WS-144 1000x550x630 5/8" 1⅛" 1½" Data applicable for R410A. For additional information contact Unique ltd. Product specifications are subject to change without notice. Appearance of products may differ slightly from catalog.

  • Page 13: Heating Element Recommendations

    3x13.7 3x16 WS-85 3x15.2 3x20 WS-102 3x18.2 3x20 WS-120 3x20.3 3x25 WS-144 3x26 3x32 Data applicable for R410A. For additional information contact Unique ltd. Product specifications are subject to change without notice. Appearance of products may differ slightly from catalog.

  • Page 14: Refrigeration Cycle Diagrams

    Advanced air conditioning systems Series 6.1 Refrigeration Cycle – Cooling Only...
  • Page 15 Advanced air conditioning systems Series 6.2 Refrigeration Cycle – Heat Pump...

  • Page 16: Installation Instructions

    Advanced air conditioning systems Series 7. INSTALATION INSTRUCTIONS 7.1 General All parts and accessories are packed and shipped with appropriate measure to ensure that everything is protected during transportation. The installation team must be familiar with the installation requirements, to exercise due care in handling and to prevent damage to the equipment.
  • Page 17 Advanced air conditioning systems Series • The arrangement of the terminals, or the length of the conductors between the cord anchorage and the terminals, shall be such that the current carrying conductors become taut before the earth conductor if the cord slips out of the cord anchorage. •...
  • Page 18 Advanced air conditioning systems Series 7.3 Typical WS Installation Fig. 7-1 1. Rubber Shock Absorbers. 7. Control Unit. 2. Strainer. 8. Electrical cable. 3. PTFE or Rubber ring. 9. Acoustic Insulation. 4. Flexible hose. 10. Hanger Mounting Brackets. 5. Cut-Off Valves. 11.
  • Page 19 Advanced air conditioning systems Series 7.4 Unit Location and Installation • Install the unit in a location with convenient access to the service panels, air filter and control box. See Fig. 7-2 for minimum permissible distances to adjacent structures. • Protect the unit from any heat source. •...
  • Page 20 Advanced air conditioning systems Series Connect the incoming water to the WATER IN connection and the return water to the • WATER OUT connection. Use adequate thread sealant and also the supplied sealing ring (3). • The supplied strainer (2) must be installed on the WATER IN connection. See Fig. 7-1. Install the strainer with the drain plug facing down, in a location with convenient service access.
  • Page 21 Advanced air conditioning systems Series 7.6 Connecting the Drain Hose Connect the supplied rubber siphon (6) to the drain hose connection. See Fig. 7-1 for details. The T- connection (breather, not supplied) and the drain hose (not supplied) immediately follow the siphon. 7.7 Connecting the Ducting Work •...

  • Page 22: Installing The Control System And Connecting Power

    Advanced air conditioning systems Series 8. INSTALLING CONTROL SYSTEM and CONNECTING POWER 8.1 Installing the Thermostat (Fig. 8-1) To WS electrical box Fig. 8-1 • Remove the thermostat from the packaging. • Install the in-room wall mounted thermostat: • Separate the front panel from the back panel by depressing the tongue lock located in the back part of the unit.
  • Page 23 Advanced air conditioning systems Series 8.2 Terminal Box Location – Single Phase Unit ONL Y FOR UNIT S WIT H ELECT RICAL HEAT ING ELEMENT S Fig. 8-2...
  • Page 24 Advanced air conditioning systems Series 8.3 Terminal Box Location – 3 Phase Unit ONL Y FOR UNIT S WIT H ELECT RICAL HEAT ING ELEMENT S Fig. 8-3...

  • Page 25: Electrical Wiring Diagrams

    Advanced air conditioning systems Series 9. Electrical Wiring Diagrams 9.1 Electrical Wiring Diagram – Single Phase Cooling Only – Model 260U HP – High pressure control ALFA 123U – Power switch unit LP – Low pressure control ALFA 260U – Room Thermostat CC –...
  • Page 26 Advanced air conditioning systems Series 9.2 Electrical Wiring Diagram – 3 Phase Cooling Only – Model 260U HP – High pressure control ALFA 123U – Power switch unit LP – Low pressure control ALFA 260U – Room Thermostat CC – Compressor contactor WS Type MAIN POWER Cable Cross Section Area mm²...
  • Page 27 Advanced air conditioning systems Series 9.3 Electrical Wiring Diagram – Single Phase with Electrical Heating Elements – Model 260U HP – High pressure control CC – Compressor contactor LP – Low pressure control CH1, CH2 – Heaters contactor ALFA 260U – Room Thermostat TS1, TS2 –...
  • Page 28 Advanced air conditioning systems Series 9.4 Electrical Wiring Diagram – 3 Phase with Electrical Heating Elements – Model 260U HP – High pressure control CC – Compressor contactor LP – Low pressure control CH1, CH2 – Heaters contactor ALFA 260U – Room Thermostat TS1, TS2 –...
  • Page 29 Advanced air conditioning systems Series 9.5 Electrical Wiring Diagram – Single Phase with Heat Pump – Model 260U HP – High pressure control ALFA 123U – Power switch unit LP – Low pressure control CC – Compressor contactor ALFA 260U – Room Thermostat RV1 –...
  • Page 30 Advanced air conditioning systems Series 9.6 Electrical Wiring Diagram – 3 Phase With Heat Pump – Model 260U HP – High pressure control ALFA 123U – Power switch unit LP – Low pressure control CC – Compressor contactor ALFA 260U – Room Thermostat RV1 –...

  • Page 31: Troubleshooting Guide

    Advanced air conditioning systems Series 10. TROUBLESHOOTING GUIDE 10.1 Troubleshooting Notes. Important! Reset: Once the unit has stopped due to failure, restart is possible after resetting. Reset the system by pressing ON/OFF button on the room thermostat. Call the technician for assistance should the failure be repeated.
  • Page 32 Advanced air conditioning systems Series Failure Code Troubleshooting (continued). Display Possible Cause Corrective Action 1. Clogged air filter 1. Clean filter. 2. Faulty fan capacitor. 2. Replace capacitor. Gas pressure too low 3. Faulty fan motor. 3. Replace fan motor. 4.
  • Page 33 Advanced air conditioning systems Series 10.3 General Troubleshooting. Symptom Probable Cause Corrective Action A/C fails to start. 1. Power supply to unit not 1. Check for proper connection of power connected (display is plugs in wall socket. blank). Check red LED on RST Controller (wherever applicable): If LED is OFF –...
  • Page 34 Advanced air conditioning systems Series General Troubleshooting (continued). Symptom Probable Cause Corrective Action Low Capacity. 1. Lack of refrigerant causes 1. Unit must be charged (according to ice formation on the the nameplate) after localizing the evaporator coil (in Cool gas leak.
  • Page 35 Advanced air conditioning systems Series 10.4 Poor Cooling Troubleshooting. Symptom Probable Cause Corrective Action Refrigerant flow 1. Refrigerant gas shortage. 1. Charge refrigerant gas. failure 2. Excessive overcharging of 2. Recharge gas. refrigerant. 3. Gas leakage. 3. Repair leakage. 4. Clogging of strainer or 4.
  • Page 36 Advanced air conditioning systems Series 10.5 Poor Heating Troubleshooting (Heat Pump). Symptom Probable Cause Corrective Action Refrigerant flow 1. Refrigerant gas 1. Charge refrigerant gas. failure shortage. 2. Recharge gas. 2. Excessive overcharging of refrigerant. 3. Repair leakage. 3. Gas leakage. 4.

  • Page 37: Control Programs And Operation Instructions

    Advanced air conditioning systems Series 11. CONTROL PROGRAMS and OPERATION INSTRUCTIONS 11.1 General Protection: The air conditioner is protected by pressure and temperature sensors. The sensors cut off the unit once extreme and dangerous conditions are detected. The DISPLAY on the thermostat indicates the failure code as stipulated in the troubleshooting section. Restart after power failure: Back-up memory keeps the working data.
  • Page 38 Advanced air conditioning systems Series Low pressure protection: Low pressure compressor protection. At each compressor re- start, the system ignores L.P entrance!! For 2 minutes. Cooling mode: At low pressure failure of 5 seconds long - shuts compressor. After compressor delay (3 minutes) if L.P closed the unite returns to normal operation.
  • Page 39 Advanced air conditioning systems Series α 11.3 Wall Mounted Thermostats 260U 1. Temp Temperature setting pushbuttons: (+) temp rise, (-) temp drop. (Continuous press on 2 buttons simultaneously will display momentarily real temp – flashing). Continuous press on 2 buttons simultaneously for 2 seconds, display real temp continuously 2.
  • Page 40 Advanced air conditioning systems Series NOTES NOTES NOTES NOTES ……………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………...
  • Page 42 Unique – Engineering & Air Conditioning Mitzpe Sapir Industrial Park P.O.B. 13201 Tsur Igal 44862, ISRAEL Tel. 972-9-7498707, Fax. 972-9-7498708 E-mail: unique@unique-eng.co.il WS-SM-EN-V04-R01 JAN 2010...

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