Daikin EWLD420I-SS [8/36] Options on request
![Daikin EWLD850I-SS [8/36] Options on request](/views2/1667993/page8/bg8.png)
8
Standard accessories (supplied on basic unit)
Evaporator Victaulic Kit - Hydraulic joint with gasket for an easy and quick water connection.
Evaporator Water side design pressure 10 bar
Y-D starter - Star Delta starter is the standard type
Double set-point - Dual leaving water temperature set-points.
Phase monitor - The phase monitor controls that phases sequence is correct and controls phase loss.
High Pressure Side Manometers
Hour Run meter - Digital compressors hour run meter
General fault contactor - Contactor for alarm warning.
Set-point reset, demand limit and alarm from external device – The leaving water temperature set-point can be
overwritten with the following options: 4-20mA from external source (by user); outside ambient temperature; evaporator
water temperature Δt. Moreover the device allow the user to limit the load of the unit by 4-20mA signal or by network system
and the microprocessor is able to receive an alarm signal from an external device (pump etc… - user can decide if this alarm
signal will stop or not the unit).
Electronic Expansion Valve
Options (on request)
Brine version – Allows the unit to operate down to -8°C leaving liquid temperature (antifreeze required).
Liquid Receiver - the receiver capacity is 170 Lt
20mm Evaporator Insulation
Suction line shut off valve - Suction shut-off valve installed on the suction of the compressor to facilitate maintenance
operation.
Discharge line shut-off valves - Discharge shut-off valve installed on the discharge of the compressor to facilitate
maintenance operations.
Sound Proof System - Made of sheet metal and internally insulated, the cabinet is "integral kind" (around the whole chiller,
not only around the compressors) to reach the best performance in noise reduction.
Dual Pressure Relief Valve on evaporator
Soft start - Electronic starting device to reduce the mechanical stress during compressor start-up
Compressor thermal overload relays - Safety devices against compressor motor overloading in addition to the normal
protection envisaged by the electrical windings.
Under/Over Voltage – This device control the voltage value of power supply and stop the chiller if the value exceeds the
allowed operating limits.
Energy Meter – This device allows to measure the energy absorbed by the chiller during its life. It is installed inside the
control box mounted on a DIN rail and show on a digital display: Line-to-Line Voltage, Phase and Average Current, Active
and Reactive Power, Active Energy, Frequency.
Evaporator flow switch for the water piping
Rubber type antivibration mounts – Supplied separately, these are positioned under the base of the unit during
installation. Ideal to reduce the vibrations when the unit is floor mounted.
Witness test – Every unit is always tested at the test bench prior to the shipment. On request, a second test can be carried
out, at customer’s presence, in accordance with the procedures indicated on the test form. (Not available for units with glycol
mixtures).
Container kit
Acoustic test
Содержание
- Code requirements safety and observant of laws directives 3
- Features and advantages 3
- Infinitely capacity control 3
- Seasonal quietness 3
- Certifications 4
- Sound configuration 4
- Versions 4
- Cabinet and structure 5
- Ecological hfc 134a refrigerant 5
- Electronic expansion valve 5
- Evaporator 5
- General characteristics 5
- Refrigerant circuit 5
- Screw compressors 5
- Control section main features 6
- Electrical control panel 6
- Safety device logic for each refrigerant circuit 6
- Chiller sequencing 7
- Digital sequencing panel 7
- Microtech iii 7
- Microtech iii remote control 7
- Regulation type 7
- Serial sequencing panel 7
- Supervising systems on request 7
- System security 7
- Options on request 8
- Standard accessories supplied on basic unit 8
- Nomenclature 9
- Technical specifications 10
- Ewld i ss 17
- Sound levels 17
- Sound pressure levels correction for different distances 17
- Ewld i ss 18
- Operating limits 18
- Table 1 evaporator minimum and maximum water 18
- Table 2 evaporator fouling factors 18
- Table 3 minimum glycol percentage for low air temperature 18
- Table 3 minimum glycol percentage for low water temperature 18
- How to use the correction factors proposed in the previous tables 19
- Table 4 correction factors for low evaporator leaving water temperature 19
- Table 5 correction factors for water and glycol mixture 19
- Water charge flow and quality 20
- Water content in cooling circuits 21
- Ewld i ss 22
- Notes 1 cc cooling capacity 2 pi unit power input 3 hr heat rejection 4 elwt evaporator leaving water temperature δt 5 c 5 data refers to 0 0176 m2 c kw evaporator fouling factor 22
- Standard ratings 22
- Notes 6 cc cooling capacity 7 pi unit power input 8 hr heat rejection 9 elwt evaporator leaving water temperature δt 5 c 10 data refers to 0 0176 m2 c kw evaporator fouling factor 23
- Notes 11 cc cooling capacity 12 pi unit power input 13 hr heat rejection 14 elwt evaporator leaving water temperature δt 5 c 15 data refers to 0 0176 m2 c kw evaporator fouling factor 24
- 91 l s 25
- Evaporator and condenser pressure drops 25
- Ewld i ss 25
- How to use the formula example evaporator 25
- Pd2 kpa pd1 kpa x where pd2 pressure drop to be determinated kpa pd1 pressure drop at nominal condition kpa q2 water flow at new working condition l s q1 water flow at nominal condition l s 25
- The unit ewld320i ss has been selected for working at the following conditions evaporator water in out 11 6 c saturated discharge temperature 40 c the cooling capacity at these working conditions is 333 kw the evaporator water flow at these working conditions is 15 1 l s the unit ewld320i ss at nominal working conditions has the following data evaporator water in out 12 7 c saturated discharge temperature 45 c the cooling capacity at these working conditions is 328 kw the evaporator water flow at these working conditions is 15 7 l s the evaporator pressure drop at these working conditions is 34 kpa the evaporator pressure drop at the selected working condition will be pd2 kpa 34 kpa x pd2 kpa 35 kpa note if the calculated evaporator water pressure drop is below 10 kpa or above 100 kpa please contact the factory for dedicated evaporator 25
- To determinate the evaporator or condenser pressure drop for different versions or at different working condition please refer to the following formula 25
- Dimensions 26
- Handling 29
- Installation notes 29
- Location 29
- Minimum clearance requirements for machine maintenance 29
- Minimum space requirements 29
- Warning 29
- Dimensions 30
- General 30
- Noise level and vibrations 30
- Performance 30
- Refrigerant 30
- Technical specification for water cooled screw chiller 30
- Unit description 30
- Chiller components 31
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