Daikin EWWQ290L-SS [39/41] Technical specifications
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Daikin EWWQ290L-SS [39/41] Technical specifications

Daikin EWWQ600L-SS [39/41] Technical specifications
TECHNICAL SPECIFICATIONS
Evaporator (PHE) The units shall be equipped with a direct expansion plate to plate type evaporator.
• The evaporator will be made of stainless steel brazed plates closed cell polyurethane insulation material (20-mm thick).
•The evaporator will have 1 or 2 refrigerant circuit.
•The evaporator will be manufactured in accordance to PED approval.
•Flow switch must be installed on plant.
•Water filter must be installed on plant.
Condenser (PHE) The units shall be equipped with a plate to plate type condenser.
• The condenser will be made of stainless steel brazed
•The condenser will have 1 refrigerant circuit.
•The condenser will be manufactured in accordance to PED approval.
•Water filter must be installed on plant.
Refrigerant circuit The unit shall have one or two refrigerant circuits according to the capacity.
•The circuits shall include as standard: electronic expansion device piloted by unit’s microprocessor control, liquid line shut-off valve,
sight glass with moisture indicator, filter drier, charging valves, high pressure switch, high and low pressure transducers and insulated
suction line.
Condensation control The controller automatically unloads the circuit when abnormal high condensing pressure is detected.
This to prevent the shutdown of the refrigerant circuit (shutdown of the unit) due to a high pressure fault.
Hydronic kit options (on request) The hydronic module shall be integrated in the unit chassis without increasing its
dimensions and includes the following elements: centrifugal pump with motor protected by a circuit breaker installed in control panel
with pressure gauge, safety valve, drain valve.
•The hydronic module shall be assembled and wired to the control panel.
•The water piping shall be protected against corrosion and insulated to prevent condensation.
Electrical control panel Power and control shall be located in the main panel that will be manufactured to ensure protection
against all weather conditions.
• The electrical panel shall be IP54 and (when opening the doors) internally protected against possible accidental contact with live
parts.
• The main panel shall be fitted with a main switch interlocked door that shuts off power supply when opening.
• The power section will include compressors and funs protection devices, compressors and fans starters and control circuit power
supply.
Controller The controller will be installed as standard and it will be used to modify unit set-points and check control parameters.
• A built-in display will shows chiller operating status plus temperatures and pressures of water, refrigerant and air, programmable
values, set-points.
• A sophisticated software with predictive logic, will select the most energy efficient combination of compressors, EEXV and condenser
fans to keep stable operating conditions to maximize chiller energy efficiency and reliability.
• The controller will be able to protect critical components based on external signals from its system (such as motor temperatures,
refrigerant gas and oil pressures, correct phase sequence, pressure switches and evaporator). The input coming from the high pressure
switch cuts all digital output from the controller in less than 50ms, this will be an additional security for the equipment.
• Fast program cycle (200ms) for a precise monitoring of the system.
Controller main features Controller shall be guarantee following minimum functions:
• Management of the circuit capacity.
•Chiller enabled to work in partial failure condition (for 2 circuit units).
• Full routine operation at condition of:
- high thermal load
-high evaporator entering water temperature (start-up)
•Display of evaporator entering/leaving water temperature.
•Display of condensing-evaporating temperature and pressure, suction superheat for each circuit.
•Leaving water evaporator temperature regulation.
•Compressor and evaporator pumps hours counter.
•Display of Status Safety Devices.
•Number of starts and compressor working hours.
•Optimized management of compressor load.
•Fan management according to condensing pressure (for condenserless units).
•Re-start in case of power failure (automatic / manual).
•Soft Load (optimized management of the compressor load during the start-up).
• Start at high evaporator water temperature.
•Return Reset (Set Point Reset based on return water temperature).
•Set point Reset (optional).
• Application and system upgrade with commercial SD cards.
•Ethernet port for remote or local servicing using standard web browsers.
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