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COMBI COOLER
EQKC
INSTALLATION AND MAINTENANCE INSTRUCTIONS
FläktGroup
DC_8931GB 20180202_R0
SAFETY INSTRUCTIONS
Warning!
The unit must be commissioned by authorised
FläktGroup personnel.
IMPORTANT INFORMATION!
• Study the unit's installation and maintenance instructions
carefully prior to starting/operating/servicing/maintaining/
dismantling it. Keep these instructions for future use.
• All service and maintenance must be carried out by experts.
The service/maintenance of cooling and water systems may
only be carried out by authorised companies using certified
personnel in accordance with European Union Regulation
303/2008 and the necessary protective equipment.
• The necessary protective equipment should include safety
goggles and gloves.
• Automatic start! Open and lock the cooling unit's main circuit
breaker before starting any work.
• Do NOT tread on the unit.
• Use only original spare parts.
Disregarding any of the above points can lead to a serious
safety risk and the withdrawal of the guarantee/ product
liability.
LIFTING
Warning!
The unit's centre of gravity is not in the centre
of the unit.
Because of its design, the centre of gravity is offset towards
the inspection side. This must be taken into account when
lifting the unit in any way. The unit should first be lifted slightly,
and then checked so that it does not tilt or appear unstable
before being lifted higher.
We reserve the right to make changes without prior notice
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Table of Contents
Summary of Contents for FläktGroup EQKC Series
- Page 1 COMBI COOLER EQKC INSTALLATION AND MAINTENANCE INSTRUCTIONS SAFETY INSTRUCTIONS Warning! The unit must be commissioned by authorised FläktGroup personnel. IMPORTANT INFORMATION! • Study the unit’s installation and maintenance instructions carefully prior to starting/operating/servicing/maintaining/ dismantling it. Keep these instructions for future use. •...
- Page 2 Installation and maintenance instructions EQKC COMBI COOLER DUTY OF NOTIFICATION AND IN-SERVICE INSPECTION WEIGHT Duty of notification Standard isolation Min. weight Max. weight If the amount of refrigerant in a unit exceeds 10 kg the super- EQKC 014 visory authorities, generally the environmental health depart- EQKC 018 ment, must be informed.
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Page 3: Alarms And Warnings
Installation and maintenance instructions EQKC COMBI COOLER ALARMS AND WARNINGS The Combi Cooler can be connected to an external control system in several ways. The two most common are shown below. Option 1 describes how the integrated control unit can be maxi- Option 2 describes how much of this functionality is transferred mised. - Page 4 Installation and maintenance instructions INSTALLATION AT HIGH ALTITUDES EQKC COMBI COOLER Styrsystem Control system Styrsystem eQ Control system eQ Combi Cooler Combi Cooler START START Interlocking Summation Alarm ALARM Alt. CP51 Operation 0-10 V Supply air coil 24 VAC actuator eQ Styrlåda Ventilställdon värme Valve actuator heating...
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Page 5: Component Description
Installation and maintenance instructions EQKC COMBI COOLER FROST PROTECTION SENSORS ELECTRICAL DATA, FUSE PROTECTION AND AMOUNT OF REFRIGERANT Important! Unit size Power Min. fuse Refrigerant kg The setting of the frost protection sensors model Circuit 1 Circuit 2 must not be altered. This could lead to frost bursting the exchangers. - Page 6 Installation and maintenance instructions EQKC COMBI COOLER Aeration Filter (max. gauge = 500 μm) All valves must be opened / closed several times during It is essential that the water is free of impurities. If not the heat aeration for all trapped air to escape. Since the subsystems transfer in the heat exchangers will be reduced as they get are connected in common water system will not be any part dirty.
- Page 7 Installation and maintenance instructions EQKC COMBI COOLER FOLLOWING A FLOW ALARM THE COIL CIRCUIT Check why the alarm was generated. Possible causes: Output variant Max. eQ size Min. flow • Dirt in the system. Supply coil flow • Incorrectly set flow switch. •...
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Page 8: Water-Cooled Condenser
Installation and maintenance instructions EQKC COMBI COOLER WATER-COOLED CONDENSER INSTALLATION AND COMMISSIONING Checklist The water-cooled condenser is activated by an automatic water regulating valve. The water regulating valve is factory set and should not be adjusted. Incorrect adjustment can Important! result in high water consumption. - Page 9 Installation and maintenance instructions EQKC COMBI COOLER COOLING UNIT portant that the compressors stop if the extract air fan stops. The cooling unit is also internally interlocked by a flow switch Inspecting the sight glasses in the water circuit and the pump for the supply air coil. The unit has two sight glasses, one mounted between the con- Because of the location of the condenser coil, the cooling re- denser coil and subcooling coil, and the other downstream...
- Page 10 Installation and maintenance instructions EQKC COMBI COOLER Control Normal operation The cooling unit supplies cold water in the brine circuit to the The compressors are controlled by the return temperature from integrated supply air coil and to the chilled beam circuit. Hot the chilled beam circuit.
- Page 11 Installation and maintenance instructions EQKC COMBI COOLER OPERATION OF THE PLC By pressing the button A, the next picture comes up. Returning to picture 1 by pressing button B. To change the values, press button up (+) or button down (-) to get to the actual value.
- Page 12 Installation and maintenance instructions EQKC COMBI COOLER OPERATIONAL AND ALARM INFORMATION Display message Explanation Alarm from the phase break relay, * 3-Fase Alarm * phase sequence fault relay Water flow in the brine circuit too * Low Water Flow * low.
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Page 13: Maintenance
Installation and maintenance instructions EQKC COMBI COOLER OPERATION AND MAINTENANCE 2. Hot vapour temperature. 3. Expansion valve (superheating of suction vapour). 4. Safety equipment (pressure switch trip function). Important! 5. Cooling capacity. Always study the safety instructions on Page 1 6.