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Daikin EWWH320DZXSA1 [17/32] 392 387 x 100
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D-EIMWC01405-18EN- 17/32
2.14 Safety Valve
Each exchanger (evaporator and condenser) is provided with a safety valve installed on a changeover valve that allows
maintenance and periodic checks, without losing a significant amount of refrigerant. Do not leave the changeover device
in the intermediate position.
To prevent damages due to inhalation and direct contact with refrigerant gas, the safety valve outlets
must be connected with a conveyor pipe before operations. These pipes must be installed so that, in
case the valve opens, the discharged refrigerant flow not invest people and/or things, or can enter
the building through windows and/or other openings. The installer is responsible for connecting the
safety valve to the purge pipe and pipe dimensioning. In this regard, refer to the harmonized standard
EN13136 to dimension the drain pipes to be connected to the safety valves
2.15 Open the isolation and/or shut off valves
Before powering the machine and thus starting the compressors, open all valves that were closed at the factory for
shipping.
The valves to be opened are:
Valve (optional) installed on the discharge line.
Liquid line valve installed under the condenser.
Valve on the liquid injection line (inverter cooling).
Valve (optional) installed on the suction line.
2.16 Electrical connections
The unit must be connected with copper wire of adequate section, based on the maximum absorbed current indicated on
the unit label and in accordance with applicable electrical regulations.
Daikin Applied Europe S.p.A. cannot be held liable for improper electrical connections.
The connections to the terminals must be made with copper terminals and cables.
The electrical connection must be made by qualified personnel.
There is a risk of electric shock
The electrical panel must be connected keeping the correct phase sequence.
2.17 Phase imbalance
In a three-phase system, excessive imbalance between the phases is the cause of motor overheating. The maximum
allowed voltage imbalance is 2%, calculated as follows:
𝐼𝑚𝑏𝑎𝑙𝑎𝑛𝑐𝑒 % =
(
𝑉𝑥 − 𝑉𝑚
)
∗ 100
𝑉𝑚
Vx = phase with greatest imbalance
Vm = average of the voltages
I.e. the three phases measure 383, 386 and 392 volts respectively, the average is:
383+386+392
= 387 V
3
The percentage of imbalance is thus:
(392-387) x 100
= 1,29%
less than the maximum admitted (2%)
387
Before any maintenance and/or electrical connection to the compressor inverter, make sure the
system is turned off and the unit main switch open.
After turning off the main switch, wait at least 20 minutes for the inverter condensers to completely
discharge. Do not perform any maintenance and/or electrical connection in this period of time.
2.18 Control circuit
Each EWWD(H) VZ unit is factory tested. Both the control and power circuits undergo a careful functional test before the
machine is shipped.
The EWWD(H) VZ unit control circuit is powered at 230 Vac.
The controller ON/OFF switch (Q0) must be rotated to the OFF position whenever machine operations are not required.
Содержание
- Cooling capacity from 320 to 1480 kw 1
- D eimwc01405 18_01en 1
- Ewwd dz 1
- Ewwh dz 1
- Hz refrigerant hfc r134a r1234ze e 1
- Installation maintenance and operating manual 1
- Water cooled oil free centrifugal chillers 1
- Contents 2
- D eimwc01405 18en 2 32 2
- Downloaded from www manualslib com manuals search engine 2
- Figures 2
- Downloaded from www manualslib com manuals search engine 3
- D eimwc01405 18en 4 32 4
- Downloaded from www manualslib com manuals search engine 4
- Fig 2 dual compressor unit component descriptions 4
- Application 6
- General description 6
- Information about r1234ze e 6
- Introduction 6
- Installation safety 7
- Installation 9
- Receiving and handling 9
- Storage 9
- Lifting instructions 11
- Positioning and assembly 11
- Shock absorbers 11
- Anchoring 12
- Water pipes 12
- Water treatment 13
- Minimum water content in the system 14
- Temperature limits and water flow 14
- Condenser protection and design considerations 15
- Evaporator frost protection 15
- Chilled water control sensor 16
- 386 392 17
- 392 387 x 100 17
- Control circuit 17
- Electrical connections 17
- Open the isolation and or shut off valves 17
- Phase imbalance 17
- Safety valve 17
- Operation 19
- Operator s responsibilities 19
- Unit description 19
- Compressor lead lag 20
- High condensing pressure control 20
- Regulation type 20
- Safeties for each cooling compressor 20
- System safeties 20
- Maintenance 21
- Pressure temperature table 22
- Routine maintenance 23
- Cleaning and storage 27
- Seasonal maintenance 27
- Service schedule 27
- Maintenance schedule 28
- All installation work must be completed as required above the plant inspected and unit ready for operations if plant conditions do not allow the unit to operate within the limits set in the catalogue the unit cannot be started if the above conditions cannot be guaranteed the customer is liable for the daikin applied commissioning approval 29
- Checks before first start up 29
- Daikin unit serial no ________________________________________________________________ daikin unit serial no ________________________________________________________________ 29
- Date __________________________________ 29
- Job name _________________________________________________________________________ job name _________________________________________________________________________ 29
- Name _________________________________ 29
- Notes this list must be completed and sent to the local daikin service department at least two 29
- Signature _________________________________ signature _________________________________ 29
- Site engineer 29
- Unit model no s ___________________________________________________________________ unit model no s ___________________________________________________________________ 29
- Warning the unit should never be operated before daikin applied authorised start up failure to observe this warning could cause serious equipment damages and void the warranty 29
- Weeks before the start 29
- Factory and field charged units instructions 30
- Important information on used refrigerant 30
- Demolition and disposal 31
- Duration 31
- Periodic checks and commissioning of pressure vessels 31
- Daikin applied europe s p a 32
- 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 to the best of their knowledge refer to the data communicated at the time of the order all the data and specifications contained herein are liable to change without notice refer to the data communicated at the time of the order daikin applied europe s p a cannot be held liable for direct or indirect damage in the broadest sense of the term arising from or related to the use and or interpretation of this publication all content is copyrighted by daikin applied europe s p a 32
- Via piani di santa maria 72 00072 ariccia rome italy tel 39 06 93 73 11 fax 39 06 93 74 014 32
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