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General
EWWF/EWWFB are new water to water units equipped with Scroll compressors, optimized to work with R410A refrigerant.

2 different versions are available :

- Cooling only units EWWF
- Heat pump units EWWFB

2 different acoustic options are available:
- Base Low Noise (BLN): units are supplied with compressors box to reduce noise emissions
- Extra Low Noise (ELN): units are supplied with compressors box and additional insulation panels on the cabinet in order to furtherly reduce noise impact

EWWF/EWWFB units are available in totally 14 sizes (20.1, 25.1, 30.1, 35.1, 40.2, 45.1, 50.2, 60.2, 75.2, 90.2, 120.2, 150.2, 170.2, 200.2), ranging from 20.1 to 200.2 kW in cooling operation and from 25.1 to 210.1 kW in heating operation.

EWWF/EWWFB units are available on two different structural frames (F1 for 20.1-45.1 sizes, F2 for 50.2-200.2 sizes). Each unit is equipped with single refrigerant circuit, single hermetic scroll compressor for F1 sizes, and two hermetic scroll compressors (tandem) for F2 sizes.
Evaporators and condensers are brazed plate heat exchanger type.
Heat pump units (EWWFB) are equipped with reversible valve, thus allowing to reverse cycle on refrigerant side and not on water side.

Cabinet and structure
Cabinet and structure are made of galvanized steel. All galvanized steel components are individually painted by a special painting process before assemblying of the unit. This painting system performs a homogeneous protection to the corrosion. The painting is a polyester powder based type, coloured in RAL 9001. The units are suitable for indoor installation.

Refrigerant circuit
Refrigerant circuit is equipped with one or two hermetic scroll compressors(depending on the frame), sight glass, filter-drier and mechanical expansion valve (electronic expansion valve is available as an option).
Heat pump units (EWWFB) refrigerant circuit is also provided with 4-way reversing valve and check valves system in order to always run liquid line in the same direction (both in cooling and in heating mode).

Compressors
Compressors are hermetic scroll type fitted with an electronic control device ensuring protection of compressors against:
- Overheating
- Overloading
- Reversal rotation
- Phase loss
All compressors have direct-on-line starting and are mounted on rubber vibration isolators in order to minimize noise and vibration transmission.

Evaporators and condensers
Evaporator and condenser heat exchangers are brazed stainless steel plate type. They are insulated with a 10 mm thick closed cell polyethylene foam material and provide with Victaulic connections.

Electrical board
Electric equipment is built in compliance with CE standards. Easy accessible in front of the unit - through an access panel fixed with screws - the equipment is complete with :
- Door lock main isolating switch
- Compressor contactors and fuses
- Compressor overload protection (optional only on F2 units)
- Automatic circuit breaker switches (Standard on F1 units, optional on F2 units)
- Phase sequence control
- Clamps for remote start/stop switch
- Clamps for remote summer/winter switch
- Clamps for external flow switches (both exchangers)
- Clamps for remote double set-point
- Clamps for external interlock
- Clamps for remote general alarm
- Connection clamps to remote keyboard (optional)
- Clamps for evaporator/condenser pump relay control (optional)
- Clamps for boiler relay control (optional)
- Clamps for dynamic set-point compensation (4-20 mA, 0-1 V, 0-5 V, 0-10 V)
- Clamps for DHW 3-way valve (accessory)
- Clamps for outdoor air temperature probe (accessory)
- Electronic control SBW655
- Soft-starter (optional)
- Power factor correction capacitors (optional)
- 0-10 V clamps for condensing control (optional)

Control
A new optimized control is supplied on all the units with a simple user interface (possibility to customize keys functions and to set menus visibility). In addition to standard features as water temperature control (with possibility to choose LWT/EWT probe), the control can also manage following functions:
- DHW control with anti-legionella function daily and weekly activated
- Dynamic set point (4-20 mA, 0-1V, 0-5V, 0-10V)
- Double set point
- OAT compensation
- Boiler/Electrical heater integration
-Condensing control
- Auto adaptative function to reduce the water content of the plant
- Managing of DHW 3-way valve (accessory)
- Advanced pump management (both primary circuit and source side)
- Remote keyboard (accessory) with possibility to connect (up to 100 m distance) without any serial interface

Safety
Each unit is equipped with following electrical / refrigerant / hydraulic safety devices :
- Door lock main isolating switch
- Phase monitor control
- High pressure switch with manual reset
- Discharge safety valve
- Low pressure switch with automatic / manual reset
- Anti-freeze probe (leaving water temperature)
- Differential pressure switch (source / plant side)

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