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Daikin EWAT290B-SRB1 [4/62] Features and benefits
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FEATURES AND BENEFITS
4/62
Compressors
Hermetic orbiting scroll type optimized for R-32 operation and complete with motor over-temperature and
over-current protection devices. Each compressor is equipped with an oil heater that keeps the oil from being
diluted by the refrigerant when the chiller is not running. The compressors are connected in Tandem or Trio
configuration on each refrigerant circuit. Each compressor is mounted on rubber antivibration mounts for a
quite operation. Unit is delivered with complete oil charge.
Evaporator
The unit is equipped with a direct expansion plate-to-plate type evaporator optimized for R-32 refrigerant
operation. This heat exchanger is made of stainless steel brazed plates and is covered with 10mm closed cell
insulation material. The exchanger is equipped with an electric heater for protection against freezing and
evaporator water connections are provided with victaulic kit (as standard). The evaporator is manufactured
in accordance to 2014/68/EU. The evaporator flow switch and the evaporator water filter are available as
option (shipped loose). Note the installation of an evaporator flow switch and an evaporator water filter is
mandatory.
Condenser
The condenser is made entirely of aluminum and it is optimized for R-32 refrigerant operation. Full-depth
louvered aluminum fins are inserted between the aluminum tubes maximizing the heat exchange.
The Microchannel technology ensures the highest performance with the minimum surface for the exchanger.
This technology reduces unit refrigerant charge compared to traditional copper tubes and aluminum
condenser.
Special treatment ensure resistance to the corrosion by atmospheric agents extending the lifetime.
Note: applications in industrial, costal, highly polluted urban environment or combinations of them, require
proper evaluation to understand if additional measures are needed to protect the condenser coil from the
aggressive environment.
Condenser fans
Condenser fans are propeller type with high efficiency design blades to maximize performances. The blades
are made of glass-reinforced resin and a guard protects each fan.
Single-V units are equipped as standard with fan speed modulation (phase cut).
Multi-V units (standard and low sound versions) are equipped with on/off fans and inverter drive is available
as an option. Multi-V units reduced noise versions are equipped with inverter driven fans as standard.
Electronic expansion valve
The unit is equipped with electronic expansion valves to achieve precise control of R-32 refrigerant mass flow.
As today’s systems require improved energy efficiency, accurate temperature control, wide range of operating
conditions, the application of electronic expansion valves becomes mandatory.
Electronic expansion valves has unique features: short opening and closing time, high resolution, positive
shut-off function to eliminate use of additional solenoid valve, continuous modulation of mass flow without
stress in the refrigerant circuit and corrosion resistance stainless steel body.
If compared to traditional thermostatic valves, electronic expansion valves allow the system to work with low
condenser pressure (winter time) without any refrigerant flow problems and the perfect control of the chilled
water temperature.
Refrigerant circuit
Each unit has one or two independent refrigerant circuits and each one includes:
• Compressor
• Refrigerant
• Evaporator
• Air Cooled Condenser
• Electronic expansion valve
• Sight glass with moisture indicator
• Filter drier
• Charging valves
• High pressure switch
• High pressure transducers
• Low pressure transducers
• Oil pressure transducer
• Suction temperature sensor
Electrical panel
Power and control are in the main panel that is manufactured to ensure protection against all weather
conditions. The electrical panel is IP54 and (when opening the doors) internally protected against possible
Содержание
- Air cooled chiller with scroll compressors 1
- Databook 1
- Ewat b 1
- Features and benefits 2
- Features and benefits 3
- Features and benefits 4
- Features and benefits 5
- Additional information related to f gas regulation eu no 517 2014 of the european parliament and of the council of 16 april 2014 on fluorinated greenhouse gases and repealing regulation ec no 842 2006 6
- Features and benefits 6
- Features and benefits 7
- Features and benefits 8
- Nomenclature 9
- Options 10
- Standard options supplied on basic units 10
- Mechanical options on request 11
- Options 11
- Options 12
- Electrical options on request 13
- Options options 14
- Installation options on request 15
- Options 15
- Other options on request 15
- Ewat b ss l 16
- Technical specification 16
- Ewat b ss l 17
- Technical specification 17
- Ewat b ss l 18
- Technical specification 18
- Ewat b ss l 19
- Technical specification 19
- Ewat b sr 20
- Technical specification 20
- Ewat b sr 21
- Technical specification 21
- Ewat b sr 22
- Technical specification 22
- Ewat b sr 23
- Technical specification 23
- Ewat b xs l 24
- Technical specification 24
- Ewat b xs l 25
- Technical specification 25
- Ewat b xs l 26
- Technical specification 26
- Ewat b xs l 27
- Technical specification 27
- Ewat b xr 28
- Technical specification 28
- Ewat b xr 29
- Technical specification 29
- Ewat b xr 30
- Technical specification 30
- Ewat b xr 31
- Technical specification 31
- Electrical specifications 32
- Ewat b ss l 32
- Electrical specifications 33
- Ewat b ss l 33
- Electrical specifications 34
- Ewat b sr 34
- Electrical specifications 35
- Ewat b sr 35
- Electrical specifications 36
- Ewat b xs l 36
- Electrical specifications 37
- Ewat b xs l 37
- Electrical specifications 38
- Ewat b xr 38
- Electrical specifications 39
- Ewat b xr 39
- Ewat b sl 40
- Ewat b ss 40
- Sound levels 40
- Ewat b sr 41
- Ewat b xs 41
- Sound levels 41
- Ewat b xl 42
- Ewat b xr 42
- Sound levels 42
- Amb t c 43
- Elwt c 43
- Ewat b s silver series 43
- Operating limits 43
- Units with multi v layout 43
- Units with single v layout 43
- Amb t c 44
- Elwt c 44
- Ewat b x gold series 44
- Multi v gold efficiency 44
- Options technical data 44
- Ref 3 ref 2 44
- Units with single v layout 44
- Air heat exchanger altitude correction factors 45
- Minimum glycol percentage for low air ambient temperature to prevent freezing of the hydraulic circuit 45
- Options technical data 45
- Water flow 45
- Water heat exchanger maximum maximum water δt 45
- Available fan static pressure correction factors 46
- Heat recovery 46
- Maximum cable dimension 46
- Options technical data 46
- Plant water conten 46
- Water quality 46
- Options technical data 47
- B c d e 48
- Ewat b s silver series single pump low lift 48
- Installations notes 48
- Multi v layout 48
- Single v layout 48
- Ewat b s silver series single pump high lift 49
- External pressure head kpa 49
- Installations notes 49
- Multi v layout 49
- Single v layout 49
- Water flow l s 49
- B c d e 50
- Ewat b s silver series twin pump low lift 50
- External static pressure kpa 50
- Installations notes 50
- Multi v layout 50
- Single v layout 50
- Water flow l s 50
- Ewat b x gold series single pump low lift 51
- External pressure head kpa 51
- External static pressure kpa 51
- H i j k 51
- Installations notes 51
- Multi v layout 51
- Single v layout 51
- Water flow l s 51
- Ewat b x gold series single pump high lift 52
- External pressure head kpa 52
- Installations notes 52
- Multi v layout 52
- Single v layout 52
- Water flow l s 52
- Ewat b x gold series twin pump low lift 53
- External static pressure kpa 53
- Installations notes 53
- Multi v layout 53
- Single v layout 53
- Water flow l s 53
- E i c b 54
- Ewat b x gold series twin pump high lift 54
- External pressure head kpa 54
- Installations notes 54
- Multi v layout 54
- Single v layout 54
- Water flow l s 54
- External pressure head kpa 55
- Installations notes 55
- Starting current with soft starter tank volume hydronic kit with tank 55
- Water filter pressure drops 55
- Installations notes 56
- Location 56
- Space requirements 56
- Warning 56
- Installations notes 57
- Multiple chillers installation closed area with wind prevalent direction 57
- Multiple chillers installation free field with wind prevalent direction 57
- Hydraulic schemes 58
- Installations notes 58
- Water filter 58
- Installations notes 59
- Technical specifications 59
- Installations notes 60
- Technical specifications 60
- Installations notes 61
- Technical specifications 61
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