EWLS240JSS - Computer cooling system DAIKIN - Free user manual and instructions

USER MANUAL EWLS240JSS DAIKIN

Date January 2021 Supersedes

English language: Original instructions All other language: Translation of the Original instructions Water-cooled screw chillers

Condenserless water-cooled screw chillers

This manual is an important supporting document for qualified personnel, but it is not intended to replace such personnel.

Label Identification 1 – Unit nameplate data 5 – Manufacturer’s logo 2 – Lifting instructions 6 – Emergency stop 3 – Hazardous Voltage warning 7 – Non-flammable gas symbol 4 – Electrical hazard symbol 8 – Gas typeD - EIMWC01008-06_02EU - 3/182

• 8.1. Information about installation of systems with R134a and R513A p. 10
• 8.2. Additional guidelines for safe use of R134a and R513A p. 10
• 8.3. Physical characteristics of refrigerant R1234ze (E). 10 8.4. Information about installation of systems with R1234ze p. 10
• 8.5. Additional guidelines for safe use of R1234ze(E) for equipment located in the open air p. 10
• 8.6. Additional guidelines for safe use of R1234ze(E) for equipment located in a machinery room p. 10

Thank you for purchasing this Daikin air conditioner.

EQUIPMENT OR ACCESSORIES COULD RESULT IN

The Daikin EWWD J-EWLD J - EWWH J–EWLH J-EWWS J- EWLS J J packaged water-cooled water chillers are designed for indoor installation and used for cooling and heating applications. The EWWD J-EWLD J units are available in 16 standard sizes and for their nominal cooling capacities see tables. The EWWH J - EWLH J - EWWS J – EWLS J units are available in 7 standard sizes and for their nominal cooling capacities see tables. The present installation manual describes the procedures for unpacking, installing, and connecting the EWWD J-EWLD J units. 1.1. Technical specifications (1)

Operation weight (Kg)

Chilled water inlet/outlet (2) (inch)

Operation weight (Kg)

Chilled water inlet/outlet (2) (inch)

Operation weight (Kg)

Chilled water inlet/outlet (2) (inch)

Operation weight (Kg)

Chilled water inlet/outlet (2) (inch)

Operation weight (Kg)

Chilled water inlet/outlet (2) (inch)

Operation weight (Kg)

Chilled water inlet/outlet (2) (inch)

) Refer to the engineering data book for the complete list of specifications, options, and features. Model EWLD J

Operation weight (Kg)

Chilled water inlet/outlet (2) (inch)

Liquid line inlet connection (3) (inch) 1 3/8” Gas discharge line connection (3) (inch) 2 ½”

Operation weight (Kg)

Chilled water inlet/outlet (2) (inch)

Liquid line inlet connection (3) (inch) 1 3/8”

Gas discharge line connection (3) (inch) 2 ½”

Operation weight (Kg)

Chilled water inlet/outlet (2) (inch)

Liquid line inlet connection (3) (inch) 1 3/8” Gas discharge line connection (3) (inch) 2 ½”

Operation weight (Kg)

Chilled water inlet/outlet (2) (inch)

Liquid line inlet connection (3) (inch) 1 3/8”

Gas discharge line connection (3) (inch) 2 ½”

Operation weight (Kg)

Chilled water inlet/outlet (2) (inch)

Liquid line inlet connection (3) (inch) 1 3/8” Gas discharge line connection (3) (inch) 2 ½”

Operation weight (Kg)

Chilled water inlet/outlet (2) (inch)

Liquid line inlet connection (3) (inch) 1 3/8”

Gas discharge line connection (3) (inch) 2 ½”

1.3. Options and features (1) Options

• Ampere and voltmeter

• Dual pressure relief valve on the condenser

• High temperature kit (only for EWWH J and EWLH J) Features

• Glycol application for leaving evaporator water temperature down to –10°C (only for EWWD-EWLD- EWWS-EWLS)

• Sight glass with moisture indication

• Voltage free contacts

• general operation/pump contact

• Setpoint override 4/20 mA

• Multiple language selection 1.4. Standard supplied accessories

• Filter kit for installation in front of the evaporator water inlet

1. Operation with Glycol – Fixed minimum capacity at 100%

2. Operation with Glycol (below 4°C Evap LWT)

3. Some units could work partialized in this area

) Refer to the engineering data book for the complete list of specifications, options, and features.

1. Operation with Glycol – Fixed minimum capacity at 100%

2. Operation with Glycol (below 4°C Evap LWT)

3. Operation with fixed minimum capacity at 100%

2. Some units could work partialized in this areaD - EIMWC01008-06_02EU - 7/182

Equipment Compressor Shut off valve Condenser Shut off valve Filter drier Shut off valve (charge valve) Solenoid valve Liquid indicator

Control equipment High Pressure Switch 21,0bar Pressure Transducer Temperature Transducer High Temperature Switch Low Pressure Limiter PZH

The units are designed for indoor installation and should be installed in a location that meets the following requirements:

1. The foundation is strong enough to support the weight of

the unit and the floor is flat to prevent vibration and noise generation.

2. The space around the unit is adequate for servicing.

3. There is no danger of fire due to leakage of inflammable

4. Select the location of the unit in such a way that the

sound generated by to the unit does not disturb anyone.

5. Ensure that water cannot cause any damage to the

location in case it drips out the unit.

NOTE Pull-down operation is restricted to one hour maximum.

5. INSPECTING AND HANDLING THE

UNIT At delivery, the unit should be checked and any damage should be reported immediately to the carrier claims agent.

When handling the unit, take into account the following:

1. List the unit preferably with a crane and belts in

accordance with the instructions on the unit. The length of the ropes (1) to be used for lifting are 4 m minimum each.

2. The unit is shipped with wooden beams (2) under it, these

have to be removed before installation.

NOTE Try to reduce the drilling in the unit to a minimum. If drilling is unpreventable, remove the iron filling thoroughly in order to prevent surface rust.

6. UNPACKING AND PLACING THE UNIT

1. Remove the wooden beams from the unit.

2. Install vibration mountings in case of an installation where

noise and vibration might an impediment.

3. Set the unit on a solid and level foundation.

The unit should be installed on a solid base. It is recommended to fix the unit on a concrete base with anchor bolts.

• Fix anchor bolts into the concrete foundation. When finally fixing the unit by means of these anchor bolts, make sure that the washers for channel DIN434, and both field supplied rubber plates and field supplied raw cork or rubber sheets for better vibration protection, are installed as indicated.

• The concrete foundation should approximately be 100 mm higher than the floor level for ease of plumbing work and better drain.

• Make sure that the foundation surface is even and flat NOTE

The measurement tabulated is based on the fact the base is made in the ground or on a concrete floor. In case the base is made on a rigid floor, it is possible to include thickness of concrete floor in that of the base.

In case a base is made on concrete floor, make sure to provide a ditch as shown. It is important to extract drainage regardless of whether a base is made in the ground or on the concrete floor (ditch- sewerage).

Ingredient ratio of the concrete is: cement 1, sand 2 and gravel 3. Insert iron bars of Ø10 at every interval of 300 mm. The edge of the concrete base should be planed.D - EIMWC01008-06_02EU - 9/182

USED This product contains fluorinated greenhouse gases. Do not vent gases into the atmosphere. Model EWWD J EWLD J EWWH J EWLH J EWWS J EWLS J Refrigerant type R134a R1234ze R513A GWP (1) value

For the EWWD J, EWWH J and EWWS J unit versions the quantity is indicated on the unit name plate. For the EWLD J, EWLH J and EWLS J unit versions, please fill the total refrigerant charge in with indelible ink on the refrigerant charge label supplied with the product. The filled-out label must be adhered inside the electric panel door. Refrigerants R134a, R1234ze(E) and R513A are classified by European Directive 2014/68/EU as Group 2 (non-dangerous) substances as it is nonflammable at standard ambient temperature and non-toxic. Due to this, no special precautions are required for storage, transport, and handling. Daikin Applied Europe S.p.A. products comply with applicable European Directives and refer for unit design to product Standard EN378:2016 and industrial Standard ISO5149. Local authorities’ approval should be verified referring to European Standard EN378 and/or ISO 5149 (where R134a and R513A are classified A1, and R1234ze(E) is classified A2L – Mildly flammable gas). 7.1. Pressure/temperature table - R134a R134a Pressure/ Temperature conversion table

8.1. Information about installation of systems with R134a and R513A Before machine installation and commissioning, the people involved in this activity must have acquired the information necessary to carry out these tasks, applying all the information collected in this book all the procedures reported in the aforementioned norms and the provided requirements by the local law. Do not allow unauthorized and/or unskilled personnel to access the unit. 8.2. Additional guidelines for safe use of R134a and R513A According to the standard EN 378-1-2016, any refrigerant system that contains R134a or R513A, can be installed without any restriction in open air or machinery rooms. Anyway, the building owner or the end user shall ensure that that access is permitted only by qualified and trained personnel, who is aware of the general safety precautions of the building. It is recommended to satisfy all the requirements listed in the EN 378-3-2016 for the installation. The refrigerant shall not be able to flow into any adjacent room, doorway, or exhaust system in the event of a leak. It is advised to install a refrigerant detection system which works also during the normal operation of the refrigerant system: in case of refrigerant leak indeed, it can activate the alarm and all the necessary emergency procedures until the machine shutoff. The alarm shall also advice the authorized personnel to take the necessary steps. The refrigerant leak detector shall be supplied by the user because it is a key component of the sprinkler system of the entire building. 8.3. Physical characteristics of refrigerant R1234ze (E) This product can be equipped with refrigerant R1234ze(E) which has minimal impact to the environment, thanks to its low value of Global Warming Potential (GWP). Refrigerant type R1234ze Safety Class A2L PED Fluid Group

GWP (ARS 100 yr ITH)

8.4. Information about installation of systems with R1234ze The chillers are built in accordance with the main European Directives (Machinery Directive, Low Voltage Directive, Electromagnetic Compatibility Directive, Pressurized Equipment Directive), make sure you also receive the declaration of product conformity with the directives along with the documentation. Before machine installation and commissioning, the people involved in this activity must have acquired the information necessary to carry out these tasks, applying all the information collected in this book. Do not allow unauthorized and/or unskilled personnel to access the unit. The chiller has to be installed in open air or machinery room (location classification III). To ensure location classification III a mechanical vent on the secondary circuit(s) has to be installed. Local building codes and safety standards shall be followed; in absence of local codes and standards refer to EN 378-3:2016 as a guide. In paragraph “Additional guidelines for safe use of R1234ze(E)” there are provided additional information that should be added to the requirements of safety standards and building codes. 8.5. Additional guidelines for safe use of R1234ze(E) for equipment located in the open air Refrigerating systems sited in the open air shall be positioned to avoid leaked refrigerant flowing into a building or otherwise endangering people and property. The refrigerant shall not be able to flow into any ventilation fresh air opening, doorway, trap door or similar opening in the event of a leak. Where a shelter is provided for refrigerating equipment sited in the open air it shall have natural or forced ventilation. For refrigeration systems installed outside in a location where a release of refrigerant can stagnate e.g., below ground, then the installation shall comply with the requirements for gas detection and ventilation of machinery rooms. 8.6. Additional guidelines for safe use of R1234ze(E) for equipment located in a machinery room When a machinery room is chosen for the location of the refrigerating equipment it shall be located in accordance with local and national regulations. The following requirements (according to EN 378-3:2016) can be used for the assessment.

• A risk analysis based on the safety concept for the refrigerating system (as determined by the manufacturer and including the charge and safety classification of the refrigerant used) shall be conducted to determine whether it is necessary to place the refrigerating system in a separate refrigeration machinery room.

• Machinery rooms should not be used as occupied spaces. The building owner or user shall ensure that access is permitted only by qualified and trained personnel doing the necessary maintenance to the machinery room or general plant.

• Machinery rooms shall not be used for storage with the exception of tools, spare parts and compressor oil for the installed equipment. Any refrigerants, or flammable or toxic materials shall be stored as required by national regulations.

• Open (naked) flames shall not be permitted in machinery rooms, except for welding, brazing or similar activity and then only provided the refrigerant concentration is monitored and adequate ventilation is ensured. Such open flames shall not be left unattended.

• A remote switching (emergency type) for stopping the refrigerating system shall be provided outside the room (near the door). A similar acting switch shall be located at a suitable location inside the room.

• All piping and ducting passing through floors, ceiling and walls of machinery room shall be sealed.

• Hot surfaces shall not exceed a temperature of 80 % of the auto-ignition temperature (in °C) or 100 K less than the auto-ignition temperature of the refrigerant, whichever is higher. Refrigerant Auto ignition temperature Maximum surface temperature R1234ze 368 °C

• Machinery rooms shall have doors opening outward and sufficient in number to ensure freedom for persons to escape in an emergency; the doors shall be tight fitting, self-closing and so designed that they can be opened from inside (antipanic system).

• Special machinery rooms where the refrigerant charge is above the practical limit for the volume of the room shall have a door that either opens directly to the outside air or through a dedicated vestibule equipped with self-closing, tight-fitting doors.

• The ventilation of machinery rooms shall be sufficient both for normal operating conditions and emergencies.

• Ventilation for normal operating conditions shall be in accordance with national regulations.

• The emergency mechanical ventilation system shall be activated by a detector(s), located in the machinery room.

• This ventilation system shall be:

• independent of any other ventilation system on the site.

• provided with two independent emergency controls one located outside the machinery room, and the other inside.

• The emergency exhaust ventilation fan shall:

• Be either in the air flow with the motor outside the airflow or rated for hazardous areas (according to the assessment).

• Be located to avoid pressurization of the exhaust ductwork in the machinery room.

• Not cause sparks to occur if it contacts the duct material.

• Airflow of the emergency mechanical ventilation shall be at least 𝑉 = 0,014 × 𝑚

is the air flow rate in m

is the mass of refrigerant charge, in kg, in the refrigerating system with the largest charge, any part of which is located in the machinery room; 0,014 is a conversion factor.

• Mechanical ventilation shall be operated continuously or shall be switched on by the detector.

• Detector shall automatically activate an alarm, start mechanical ventilation, and stop the system when it triggers.

• The location of detectors shall be chosen in relation to the refrigerant and they shall be located where the refrigerant from the leak will concentrate.

• The positioning of the detector shall be done with due consideration of local airflow patterns, accounting for location sources of ventilation and louvers. Consideration shall also be given to the possibility of mechanical damage or contamination.

• At least one detector shall be installed in each machinery room or the occupied space being considered and/or at the lowest underground room for refrigerants heavier than air and at the highest point for refrigerants lighter than air.

• Detectors shall be continuously monitored for functioning. In the case of a detector failure, the emergency sequence should be activated as if refrigerant had been detected.

• The pre-set value for the refrigerant detector at 30 °C or 0 °C, whichever is more critical, shall be set to 25 % of the LFL. The detector shall continue to activate at higher concentrations. Refrigerant LFL Pre-set alarm R1234ze 0,303 kg/m

• All electrical equipment (not only the refrigerating system) shall be selected to be suitable for use in the zones identified in the risk assessment. Electrical equipment shall be deemed to comply with the requirements if the electrical supply is isolated when the refrigerant concentration reaches 25 % of the lower flammable limit or less.

• Machinery rooms or special machinery rooms shall be clearly marked as such on the entrances to the room, together with warning notices indicating that unauthorized persons shall not enter and that smoking, naked light or flames are prohibited. The notices shall also state that, in the event of an emergency, only authorized persons conversant with emergency procedures shall decide whether to enter the machinery room. Additionally, warning notices shall be displayed prohibiting unauthorized operation of the system.

• The owner / operator shall keep an updated logbook of the refrigerating system. The optional leak detector supplied by DAE with the chiller should be used exclusively to check refrigerant leakage from the chiller itself.

9.1. Routine maintenance for R1234ze Personnel working on the electrical or the refrigeration components must be authorized, trained, and fully qualified. Maintenance and repair requiring the assistance of other skilled personnel should be carried out under the supervision of the person competent in the use of flammable refrigerants. Any person conducting servicing or maintenance on a system or associated parts of the equipment should be competent according to EN 13313. Persons working on refrigerating systems with flammable refrigerants should have competence in safety aspects of flammable refrigerant handling supported by evidence of appropriate training. electrical components Never work on any electrical components, until the general supply to the unit has been cut using the disconnect switch(es) in the control box. The frequency variators used are equipped with capacitor batteries with a discharge time of 20 minutes; after disconnecting power wait 20 minutes before opening the control box. refrigerating system The following precautions should be taken before working on the refrigerant circuit: — obtain permit for hot work (if required); — ensure that no flammable materials are stored in the work area and that no ignition sources are present anywhere in the work area; — ensure that suitable fire extinguishing equipment is available; — ensure that the work area is properly ventilated before working on the refrigerant circuit or before welding, brazing or soldering work; — ensure that the leak detection equipment being used is non-sparking, adequately sealed or intrinsically safe; — ensure that all maintenance staff have been instructed. The following procedure should be followed before working on the refrigerant circuit:

2. purge circuit with inert gas (e.g.,

4. purge again with inert gas (e.g.,

The area should be checked with an appropriate refrigerant detector prior to and during any hot work to make the technician aware of a potentially flammable atmosphere.D - EIMWC01008-06_02EU - 12/182

If compressors or compressor oils are to be removed, it should be ensured that it has been evacuated to an acceptable level to ensure that there is no flammable refrigerant remaining within the lubricant. Only refrigerant recovery equipment designed for use with flammable refrigerants should be employed. If the national rules or regulations permit the refrigerant to be drained, this should be done safely, using a hose, for example, through which the refrigerant is discharged into the outside atmosphere in a safe area. It should be ensured that an inflammable explosive refrigerant concentration cannot occur in the vicinity of an ignition source or penetrate into a building under any circumstance. In the case of refrigerating systems with an indirect system, the heat-transfer fluid should be checked for the possible presence of refrigerant. After any repair work, the safety devices, for example refrigerant detectors and mechanical ventilation systems, should be checked and the results recorded. It should be ensured that any missing or illegible label on components of the refrigerant circuit is replaced. Sources of ignition should not be used when searching for a refrigerant leak.

This chiller, whether with R134a, R513A or R1234ze, must be maintained by qualified technicians. Before beginning any work on the system, personnel shall assure that all security precautions have been taken. Always protect the operating personnel with personal protective equipment appropriate for the tasks to be performed. Common individual devices are: Helmet, goggles, gloves, caps, safety shoes. Additional individual and group protective equipment should be adopted after an adequate analysis of the specific risks in the area of relevance, according to the activities to be performed.

This product is factory charged with N

The units are equipped with a refrigerant inlet (discharge side) and a refrigerant outlet (liquid side) for the connection to a remote condenser. This circuit must be provided by a licensed technician and must comply with all relevant European and national regulations. 10.1. Precautions when handling piping If air or dirt gets in the water circuit, problems may occur. Therefore, always take into account the following when connecting the water circuit:

1. Use clean pipes only.

2. Hold the pipe end downwards when removing

3. Cover the pipe end when inserting it through a wall

so that no dust and dirt enter. The discharge and liquid line must be welded directly to the remote condenser piping. For use of the correct pipe diameter see table of Technical specifications. Make sure the pipes are filled with N

during welding in order to protect the pipes against soot. There should be no blockage (stop valve, solenoid valve) between the remote condenser and the provided liquid injection of the compressor. 10.2. Leak test and vacuum drying The units were checked for leaks by the manufacturer. After connection of the piping, a leak test must be performed and the air in the refrigerant piping must be evacuated to a value of 4 mbars absolute by means of a vacuum pump. Do not purge the air with refrigerants. Use a vacuum pump to vacuum the installation. 10.3. Charging the unit

1. Perform an integral pre-start inspection like explained in

“BEFORE STARTING”. Carefully perform all required procedures like explained in chapters from which is referred to in chapter “BEFORE STARTING”, but do not start the unit. It is also necessary to read the operation manual delivered with the unit. This will contribute to understand the operation of the unit and its electronic controller. Pre-charge of refrigerant without operation of the unit

2. Use the 1/4” SAE Flare stop valve on the filter drier to

pre-charge the unit with the complete calculated pre- charge. Do not operate the compressor for pre-charging, this to avoid compressor damage!

3. After completion of procedure step 2, perform an “initial

start” test: 3.1. Start the compressor and wait for the compressor to go through the star/delta. Carefully check during start-up:D - EIMWC01008-06_02EU - 13/182

• that compressor is not producing any abnormal noise or vibration;

• that high pressure rises, and low pressure drops within 10 seconds after to evaluate if the compressor is not operating in reverse due to wrong wiring;

• that no safeties are activated. 3.2. Stop the compressor after 10 seconds. Fine-tuning of refrigerant charge while unit is in operation

4. Use the 1/4” SAE Flare valve on the suction for fine-

tuning of the refrigerant charge and make sure to charge the refrigerant in its liquid state. 4.1. For fine-tuning of the refrigerant charge, the compressor must operate at full load (100%). 4.2. Verify the superheat and subcooling:

• superheat must be between 3 and 8 K

• subcooling must be between 3 and 8 K 4.3. Verify the oil sight glass. Level must be within the sight glass. 4.4. Verify the liquid line sight glass. It should be sealed and not indicate moisture in the refrigerant. 4.5. As long as the liquid-line sight glass is not sailed, add refrigerant in steps of 1 Kg and wait until the unit runs in stable conditions. Repeat the complete procedure step 4 until the liquid line sight glass is sealed. The unit must have the time to stabilize which means that this charging has to be done in a smooth way.

5. Note down the superheat and subcooling for future

and on the refrigerant charge label supplied with the product.

NOTE Take care for contamination of the remote condenser in order to avoid blocking of the system. It is impossible for the manufacturer to control the contamination of the “foreign” condenser of the installer. The unit has a strict contamination level.

11. PREPARING, CHECKING AND

CONNECTING THE WATER CIRCUIT

The units are equipped with a water inlet and water outlet for connection to a chiller water circuit. This circuit must be provided by a licensed technician and must comply with all relevant European and national regulations. If air or dirt gets in the water circuit, problems may occur. Therefore, always take into account the following when connecting the water circuit:

1. Use clean pipes only.

2. Hold the pipe end downwards when removing

3. Cover the pipe end when inserting it through a wall

so that no dust and dirt enter.

1. Preparing the unit for connection to the water circuit.

couplings and a filter is delivered with the unit.

Water inlet of the evaporator

Water inlet pipe containing the flow switch and the water inlet temperature sensor

Field water pipe circuit

As not to damage the parts of the units during transport, the water inlet pipe with the flow switch and the water inlet temperature sensor and the water outlet pipe with the outlet water temperature sensor, are not factory mounted.

• Connecting the water inlet pipe containing the flow switch. The water inlet pipe containing the flowswitch.is mounted on the side of the water inlet of the evaporator(s) and is pre-insulated. Cut the tie wraps and fix the pipe with the supplied Victaulic

couplings to the evaporator inlet(s).

• Connecting the water outlet pipe. The water outlet pipe is mounted on the side of the water outlet of the evaporator and is pre- insulated. Cut the tie wraps and fix the pipe(s) with the supplied Victaulic

• After installation of the water inlet and outlet pipes and as a general rule for other units, it is recommended to check the insertion depth of the water temperature sensors into the connection pipes prior the operation (see figure).

Connecting the filter

• The filter kit supplied with the unit must be installed in front of the evaporator water inlet by means of the supplied Victaulic

couplings as shown in the figure. The filter has holes of diameter 1,0 mm and secures the evaporator against clogging.

• Improper installation of the supplied filter will result in severe damage of the equipment (freezing of the evaporator). A field supplied blow down port for flushing fluid and accumulated material from inside the filter can be connected on the filter end cap.D - EIMWC01008-06_02EU - 14/182

• Connecting the counter pipes Weld the supplied counter pipes to the ends of the water circuit and connect to the unit with the provided Victaulic

2. Drain taps must be provided at all low points of the

system to permit complete drainage of the circuit during maintenance or in case of shut down. The drain plug is provided to drain the condenser. When doing this, also remove the air plugs (refer to the outlook diagram).

3. Air vent must be provided at all high points of the system.

The vents should be located at points which are easily accessible for servicing.

4. Shut-off valves should be provided at the unit so that

normal servicing can be accomplished without draining the system.

5. Vibration eliminators in all water piping connected to the

chiller are recommended to avoid straining the piping and transmitting vibration and noise.

6. For units in double circuit configuration with common

leaving water control (ELWT), be sure to foresee an insertion hole for the additional water temperature sensor. Sensor and sensor holder are optional parts. The insertion hole shall be 1/4” GAS female thread and should be located in the mixed waterflow of the chillers. Make sure that the sensor tip is in the waterflow and that you have a length of straight pipe (L) of at least 10x the pipe diameter (A) before the sensor.

Choose the position of insertion in a way that the cable length of the sensor (10 m) is long enough.

12. WATER CHARGE, FLOW AND

QUALITY To assure proper operation of the unit, the water flow through the evaporator must be within the operation range as specified in the table below and a minimum water volume is required in the system. Model Minimum water flow [l/min] Maximum water flow [l/min]

The minimum water volume v [l] in the system must fulfil the criteria below: v>(Q/2)xT/(Cx∆T) Q highest cooling capacity of the unit in lowest capacity step within the range of application (kW) t antirecycling timer of unit (AREC)/2(s)=300 s C specific heat capacity of the fluidum (kJ/kg°C)=4,186 kJ/kg°C for water ∆T temperature difference between starting and stopping of the compressor: ∆T=a+2b+c (for designation of a, b, and c, refer to the operation manual)

NOTE For units in a double circuit configuration, the minimum required water volume in the system must equal the biggest required minimum volume of every individual chiller in the system.

The water quality must be in accordance with the specifications listed the table below: DAE Water quality requirements Shell & tube Heat Exchanger Brazed Plate Heat Exchanger pH at 25°C

6.8~8.0 Electrical conductivity at 25°C [μS/m] < 800 < 500 Chloride Ion [mg Cl-/l] < 150 < 70 (HP

The water pressure should not exceed the maximum working pressure of 10 bar.

NOTE Provide adequate safeguards in the water circuit to make sure that the water pressure will never exceed the maximum allowable working pressure.

13. PIPING INSULATION

The complete water circuit, inclusive all piping, must be insulated to prevent condensation and reduction of the cooling capacity. Protect the water piping against water freezing during winter period (e.g., by using a glycol solution or heater tape).D - EIMWC01008-06_02EU - 15/182

RELIEF DEVICES Discharge of the refrigerant into installation area has to be in accordance with local regulations. If required it is possible to connect a 1” pipe to each pressure relief valve on the condenser and ½” pipe to each pressure relief valve on the evaporator. Cross section and length of the discharge line must comply with local codes.

All field wiring and components must be installed by a licensed electrician and must comply with relevant European and national regulations. The field wiring must be carried out in accordance with the wiring diagram supplied with the unit and the instructions given below. Be sure to use a dedicated power circuit. Never use a power supply shared by another appliance.

1. The electrical power supply to the unit should be arranged

so that it can be switched on or off independently of the electrical supply to other items of the plant and equipment in general.

2. A power circuit must be provided for connection of the

unit. This circuit must be protected with the required safety devices, i.e., a circuit breaker, a slow blow fuse on each phase and an earth leak detector. Recommended fuses are mentioned on the wiring diagram supplied with the unit. Switch off the main isolator switch before making any connections (switch off the circuit breaker, remove or switch off the fuses). 15.3. Connection of the water-cooled water chiller power supply

1. Using the appropriate cable, connect the power circuit to

the L1, L2 and L3 terminals of the unit.

2. Connect the earth conductor (yellow/green) to the

earthing terminal PE. 15.4. Interconnection cables A pump interlock contact must be installed in series with the contact of the flow switch(es) to prevent the unit from operating without water flow. A terminal is provided in the switch box for the electrical connection of the interlock contact. In both cases, all units must be equipped with an Interlock contact!

NOTE Normally the unit will not operate if there is no flow thanks to the standard installed flow switch. But as to have a double safety, you must install the pump interlock contact in series with the contact of the flow switch. Operating the unit without flow will result in very severe damage to the unit (freezing of the evaporator).

• Voltage free contacts The controller is provided with some voltage free contacts to indicate the status of the unit. These voltage free contacts can be wired as described on the wiring diagram. The maximum allowable current is 2 A.

• Remote inputs Besides the voltage free contacts, there are also possibilities to install remote inputs. They can be installed as shown on the wiring diagram. 15.5. Periodic obligatory checks and starting up of appliances under pressure The units are included in category III of the classification established by the European Directive 2014/68/EU (PED). For chiller belonging to this category, some local regulations require a periodic inspection by an authorized agency. Please check with your local requirements. 15.6. Disposal The unit is made of metal, plastic, and electronic parts. All these parts must be disposed of in accordance with the local regulations in terms of disposal. Lead batteries must be collected and sent to specific refuse collection centres. Oil must be collected and sent to specific refuse collection centres.D - EIMWC01008-06_02EU - 16/182

The unit should not be started, not even for a very short period of time, before the following pre-commissioning checklist is filled out completely. tick when checked standard steps to go through before starting the unit

Check for external damage.

Open all shut-off valves.

Install main fuses, earth leak detector and main switch. Recommended fuses: aM according to IEC standard 269-2. Refer to the wiring diagram for size.

Supply the main voltage and check if it is within the allowable ±10% limits of the nameplate rating. The electrical main power supply should be arranged so, that it can be switched on or off independently of the electrical supply to other items of the plant and equipment in general. Refer to the wiring diagram, terminals L1, L2 and L3.

Supply water to the evaporator and verify if waterflow is within the limits as given in the table under “Water charge, flow and quality”.

The piping must be completely purged. See also chapter “Preparing, checking and connecting the water circuit”.

Connect the pump contact(s) in series with the contact of the flow switch(es), so that the unit can only come in operation when the water pumps are running, and the water flow is sufficient.

Check the oil level in the compressors.

Install the filter kit(s) supplied with the unit in front of the evaporator(s) water inlet.

Check that all the water sensors are correctly fixed into the heat exchanger (see also the sticker attached to the heat exchanger).

NOTE It is necessary to read the operation manual delivered with the unit before operating the unit. It will contribute to understand the operation of the unit and its electronic controller. Close all switch box doors after installation of the unit.D - EIMWC01008-06_02EU - 17/182

• Wiring diagram in case of star delta starter

(Important information regarding the refrigerant used) The refrigerant system will be charged with fluorinated greenhouse gases. Do not vent gases into the atmosphere.

1. Fill in with indelible ink the refrigerant charge label supplied with the product as following instructions:

- the refrigerant charge for each circuit (1; 2; 3) - the total refrigerant charge (1 + 2 + 3) - calculate the greenhouse gas emission with the following formula: GWP value of the refrigerant x Total refrigerant charge (in kg) / 1000

a Contains fluorinated greenhouse gases b Circuit number c Factory charge d Field charge e Refrigerant charge for each circuit (according to the number of circuits) f Total refrigerant charge g Total refrigerant charge (Factory + Field) h Greenhouse gas emission of the total refrigerant charge expressed as tonnes of CO

equivalent m Refrigerant type n GWP = Global Warming Potential p Unit serial number

2. The filled-out label must be adhered inside the electrical panel.

Periodical inspections for refrigerant leaks may be required depending on European or local legislation. Please contact your local dealer for more information. NOTICE In Europe, the greenhouse gas emission of the total refrigerant charge in the system (expressed as tonnes CO

equivalent) is used to determine the maintenance intervals. Follow the applicable legislation. Formula to calculate the greenhouse gas emission: GWP value of the refrigerant x Total refrigerant charge (in kg) / 1000. Use the GWP value mentioned on the greenhouse gases label. This GWP value is based on the 4th IPCC Assessment Report. The GWP value mentioned in the manual might be outdated (i.e., based on the 3rd IPCC Assessment Report).D - EIMWC01008-06_02EU - 19/182

The present publication is drawn up by of information only and does not constitute an offer binding upon Daikin Applied Europe S.p.A.. Daikin Applied Europe S.p.A. has compiled the content of this publication to the best of its knowledge. No express or implied warranty is given for the completeness, accuracy, reliability, or fitness for particular purpose of its content, and the products and services presented therein. Specifications are subject to change without prior notice. Refer to the data communicated at the time of the order. Daikin Applied Europe S.p.A. explicitly rejects any liability for any direct or indirect damage, in the broadest sense, arising from or related to the use and/or interpretation of this publication. All content is copyrighted by Daikin Applied Europe S.p.A..

EWLS110J-SS ÷ 270J-SS

GWP (ARS 100 yr ITH)

GWP (ARS 100 yr ITH)

GWP (ARS 100 yr ITH)

• Ligação BMS (MODBUS, BACNET, LON)

GWP (ARS 100 lat ITH)