Summary of Contents for EDPAC Model 6 400V/3PH/50Hz
- Page 1 Close Control Small System Range Chilled Water Units Installation, Operation & Maintenance Manual 50/60Hz...
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Page 2: Table Of Contents
Annual Maintenance Inspection Check While every precaution has been taken to ensure accuracy and completeness in this manual, EDPAC assumes no responsibility, and disclaims all liability for damages resulting from use of this information or for any errors or omissions. Document reference E4.19-02-06-04... -
Page 3: General
INSTALLATION GENERAL On receiving the equipment it should be checked to ensure that it is complete and in perfect condition. The carrier should be notified immediately, in writing, of any damage that might have been caused in transit. HANDLING Always keep the unit vertically upright and do not leave it out in the open. The unit can be moved with a pallet truck. If a forklift is being used ensure the forks extend beyond the pallet. -
Page 4: Mechanical Installation
SERVICE ACCESS Downflow Units Service of a downflow unit can be generally completed from the front of the unit. To remove certain components from the unit it may be easier and quicker to have side access to assist in these operations. When positioned there should be a minimum clearance in front of the unit of 0.6m. -
Page 5: Water And Drain Connections
CHILLED WATER UNITS CHILLED WATER PIPING CONSIDERATIONS Chilled water units are shipped with the flow and return pipes terminated with soft solder caps. The complete system is pressurised to 75psi with dry nitrogen. This pressure should be rechecked and discharged before caps are unsoldered. Supply and return pipes are clearly marked. - Page 6 GENERAL ENGINEERING DATA Model Air Side Data Air Volume 1,800 3,600 5,400 External Static Pressure ESP No. of Fans Fan Motor 0.55 1.10 1.50 Optional EC Plug Fan Quantity Fan Diameter Fan Motor Fan Absorbed Power Filter Data Downflow Filter Size 495 x 535 495 x 535 495 x 695...
- Page 7 ELECTRICAL DETAILS – CHILLED WATER UNITS 400V/3PH/50Hz Model Controls FLA Fans FLA 10.9 10.9 13.9 Reheat FLA Humidifier FLA Max Unit FLA - Cooling only 10.0 10.0 10.0 Max Fuse FLA 13.4 14.6 18.5 Max Unit FLA - Cooling & Dehumidification 20.0 20.0 25.0...
- Page 8 ELECTRICAL DETAILS – CHILLED WATER UNITS 380V/3PH/60Hz Model Controls FLA Fans FLA 10.3 10.3 13.2 Reheat FLA Humidifier FLA Max Unit FLA - Cooling only 10.0 10.0 10.0 Max Fuse FLA 12.9 14.2 18.0 Max Unit FLA - Cooling & Dehumidification 15.0 20.0 25.0...
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Page 9: General
OPERATION GENERAL MICROPROCESSOR CONTROLS All Units shall be fitted as standard with the latest Delta range of DIN rail mounted Microprocessor Controls. The Control System utilises a main Microprocessor Interface Board equipped with a set of terminals necessary to connect the Board to the controlled devices.All software is permanently stored in flash RAM and is therefore protected even in the event of a power failure. - Page 10 AIRFLOW OPERATION a) When the electrical power has been energised for at least 3 hours, the unit may be energised by pressing the "On/Off" key on the keypad. The fan contactor KM1 (& KM2-Duplex) will energise establishing airflow. POWER FAILURE, INTERRUPTION OR SYSTEM RESET a) Should a `brownout' (where voltage is low enough to cause the electronics to fail) or electrical power failure occur, the controller will be alerted as the voltage begins to drop.
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Page 11: Heating Operation
HEATING OPERATION GENERAL This can take one of two forms: Electrical heating: The electric elements heat the air passing over them. Heating is supplied by 3 elements configured to support 2 stages of heating. Airflow has to be established before the elements are energised. The heaters are protected by a manual reset thermostats. -
Page 12: Dehumidification Control
DEHUMIDIFICATION CONTROL a) With the airflow established, an increase in return air relative humidity above the return air relative humidity setpoint (default 50.0%) will prompt the controller to call for dehumidification. b) The chilled water proportional valve opens 100% to produce 100% cooling. b) Should the return air relative humidity drop the return air relative humidity setpoint, the controller will cancel the dehumidification stage. -
Page 13: Alarms
ALARM CONDITION - The red ALARM button on the front display panel lights up, the drain valve opens and electrical supply to the boiler is cut off when: Absorbed current exceeds 1.8 times the rated current (generally due to the fill valve overload) ... - Page 14 PGD DISPLAY Turning the unit On/Off : Pressing the “ ESC” & the “ Enter / Return” arrow buttons together turns on and off the unit at the display. Pressing the up arrow button followed by the “ Enter / Return”...
- Page 15 ALARMS The following alarms can be activated in an alarm condition & displayed on the display screen. All alarms can be set as serious or non-serious through the keypad LARM LIST AL 01 Compressor 1 HP / Thermal Overload AL 02 Compressor 2 HP / Thermal Overload AL 03 Compressor 1 LP...
- Page 16 ALARMS AL 37 Alarms Probe B00 Air pressure fault or disconnected AL 38 Alarms Probe B00 fault Head press. circuit 1 AL 39 Alarms Probe B00 fault Head press. circuit 2 AL 40 Desiccant Dryer Alarm AL 41 Alarm clock AL 42 Permanent memory Read/Write error Contact factory AL 43...
- Page 17 ALARMS AL 71 Alarm Compressor 2 VSD AL 72 Alarms Probe B00 External humidity fault AL 73 Alarm External smoke alarm (Freecooling disabled) AL 74 Alarm Ziehl-Abegg fan n1 AL 75 Warning Ziehl-Abegg fan n1 AL 76 Alarm Ziehl-Abegg fan n1 Offline AL 77 Alarm Ziehl-Abegg fan n2 AL 78...
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Page 18: Common Components
MAINTENANCE GENERAL CHECKLIST SAFETY NOTE This equipment is designed for safe operation provided it is installed, maintained and serviced in accordance with the guidelines laid down in this section of the manual. They should therefore be studied in advance by any person wishing to work on the equipment The equipment contains electrical components at high voltage. - Page 19 AIR FILTERS To maintain efficient operation, the air filters should be checked monthly and renewed as required. Because renewal intervals may vary with environmental conditions and filter type, each unit is equipped with a filter clog switch which warns of restricted air flow through the filter compartment by activating the 'Change Filter' alarm.
- Page 20 DEHUMIDIFICATION FUNCTIONAL CHECK Set the humidification setpoint to 10%RH below the room humidity reading. Make sure that the temperature set point is at or above room temperature. a) The chilled water valve should open, and the system should begin to cool/dehumidify. Return the humidity setting to the desired room relative humidity setting.
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Page 21: Fault Finding Guide
FAULT FINDING GUIDE YMPTOM OSSIBLE AUSE EMEDY No Power No power to the unit electric panel Check that the electrical power source is (Green On/Off control button not lit) live and the main disconnect switch is closed No power to the control circuit 1) Check that the control circuit breaker is closed 2) Check the 24V secondary fuse... - Page 22 YMPTOM OSSIBLE AUSE EMEDY 1) No power to the fan motor Check the fan motor MCB and electric LACK OF AIRFLOW Loss of Airflow alarm supply at the motor box terminals 2) Clogged filters Replace the filters 3) The airflow is obstructed check fan inlets, air intake and supply paths are free 4) the main fan overload has tripped...
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Page 23: Monthly Maintenance Inspection Check
MONTHLY MAINTENANCE INSPECTION CHECK MODEL NUMBER SERIAL NUMBER DATE INSPECTOR ILTERS TEAM UMIDIFIER Check filter switch (if fitted) Check humidifier bottle for deposits Inspect filters and replace if necessary Check condition of steam hoses RIVE ACKAGE HILLED ATER SECTION Blower impellers moving freely and free of debris Check that the valve motor is correctly secured Check belt tension and condition Check pipework is secure. -
Page 24: Annual Maintenance Inspection Check
ANNUAL MAINTENANCE INSPECTION CHECK MODEL NUMBER SERIAL NUMBER DATE INSPECTOR ILTERS Check filter switch (if fitted) ISTRIBUTION Inspect filters and replace if necessary Ensure that inlet/return airways are unrestricted RIVE ACKAGE LECTRIC ANEL Blower impellers moving freely and free of debris Check MCB’s Check belt tension and condition Check electrical connections...
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