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D-EIMWC01206-15EN - 10/20 

 

Refer to the specific wiring diagram for the unit 
purchased. Should the wiring diagram not be on the unit 
or should it have been lost, please contact the 
manufacturer representative who will send you a copy. 
In case of discrepancy between the wiring diagram and 
the visual check of the electric wires of the command 
and control panel, contact the manufacturer 
representative. 
Use only copper conductors to avoid overheating or 
corrosion in the connection points, with resulting risk of 
damage to the unit. 
To avoid interference, all the command and control 
cables must be connected separately from the power 
ones, using several raceways for this purpose. 
Before performing service operations on the unit, open 
the general disconnection switch located on the main 
power supply. 
 
CAUTION: If the unit is off but the disconnection switch 
is in the closed position, the circuits not being used will 
still be active. 
Never open the terminal board of the compressors 
without having disconnected the main switch of the 
machine. 
Simultaneous mono and three-phase loads and 
imbalance between the phases can cause leakage 
towards earth up to 150mA during the normal operation 
of the unit. 
The protections for the power supply system must be 
designed based on the values mentioned above. 
 

Wiring at the installation location 

 

The operations of wiring at the installation 

location and possibly other components must be 
performed by an authorized technician and must 
comply with the current national and European laws on 
the subject. 
 
The on-site wiring must be done in conformity with the 
wiring diagram supplied with the machine and the 
instructions listed below. 
 
Make sure to use a dedicated electric circuit. Never use 
a power supply shared with other equipment. 
 

NOTE

 - Verify on the wiring diagram all the operations 

listed below in order to better understand how the 
equipment operates. 
 
Components table: 
 
F1, 2 

Main fuses of the equipment    

L1, 2, 3 

Main power supply terminals 

PE 

Main earth terminal 

FS  

Switch 

Q10 

Main insulator switch 

--- 

On-site wiring 

 
Electric circuit and wiring requirements 

 

1.  The power supply to the unit must be prepared 

so that it can be turned on and off 
independently from that of other components 
of the system or other appliances in general. 

2.  Plan an electrical circuit for the connection of 

the unit. This circuit must be protected with the 
necessary safety devices, that is a main 
switch, an SB fuse on each phase and a 

leakage towards earth detector. The 
recommended fuses are listed in the wiring 
diagram provided with the unit. 

  

 

 

Turn off the switch of the main insulator before 

performing any connection (turn off the switch, remove 
or disable the fuses). 
 

Connection of the power supply 
 ofthe unit 

 
Using the suitable wire, connect the power circuit to the 
terminals L1, L2 and L3 of the electric panel. 
 
CAUTION: Never twist, pull or apply weight to the 
terminals of the main switch. The wires of the power 
supply line must be supported by adequate systems.

 

The wires connected to the switch must respect the 
elevated insulation distance and the distance of surface 
insulation between the active conductors and the mass, 
in accordance with IEC 61439-1, Table 1 and 2 and 
local national laws.The wires connected to the main 
switch must be tightening using a wrench torque and 
complying with the unified tightening values relative to 
the quality of the screws of the washers and the nuts 
used. 
 
2   Connect the earthing conductor (yellow/green) to the 
     PE earthing terminal. 
 

Interconnecting wires 

 

Usually the appliance does not work without 

flow, thanks to the flow meter installed standard, 
however, to be doubly safe, it is compulsory that a 
status contact of the water pump be installed in series 
with the contact of the flow meter/s in order to prevent 
the unit from operating if the pump has not started. 
 
If the unit starts operating without flow, very serious 
damage occurs (freezing of the evaporator). 



Clean contacts 
The controller has some clean contacts to indicate 
the status of the unit. These contacts can be wired as 
shown in the wiring diagram. The maximum current 
allowed is 2 A. 

 



Remote inputs 

 In addition to the clean contacts, it is also possible 
 to install remote inputs. For installation check the 
wiring diagram. 
 

Before start-up 

 

The unit must be started for the first time 

ONLY by DAIKIN authorised personnel.  
The unit must absolutely not be started, even for a very 
short period of time, without having checked it in minute 
detail filling out the following list at the same time. 
 

 

Checks to be performed before starting 

the unit 

 1 

Check for exterior damage 

 2 

Open all the 

closing valves

 

Summary of Contents for EWHQ100G

Page 1: ...n manual EWWQ090G EWWQ720L Water cooled scroll chillers EWLQ090G EWLQ720L Condenserless EWHQ100G EWHQ400G Heat pump scroll chillers Refrigerant R410A D EIMWC01206 15EN REV 00 Date Supersedes EWLQ G L Condenserless water cooled chillers ...

Page 2: ... unit can be seasonally inverted General Information All the units are delivered together withwiring diagrams certifieddrawings nameplateandDoC DeclarationofConformity Thesedocumentslistallthe technicaldataoftheunitacquiredandCONSTITUTEAN INTEGRALANDESSENTIALPARTOFTHISMANUAL In case of any discrepancy between this manual and the equipment s documents please refer to on board documents In case of a...

Page 3: ...it Identification of the labels 1 Manufacturer s logo 5 Hazardous voltage warning 2 Type of coolant in the circuit s 6 Non flammable gas symbol 3 Electrical hazard symbol 7 Identification data of the unit 4 Tighten electrical cables warning 8 Instructions for handling lifting With the exception of the unit s name plate which is always in the same position the other plates may be in different posit...

Page 4: ...gency Service wait without leaving the injured person alone until the rescue operators come Give all necessary information to the rescue operators Positioning and assembly The unit must be installed on a sturdy and perfectly level foundation For the earthing a resistant base is cement must be created with a width greater than that of the unit This base must be able to support its weight Anti vibra...

Page 5: ...the unit very slowly keeping it perfectly level Avoid bumping and or shaking the unit during the handling and loading unloading operations from the transportation vehicle push or pull the unit only using the base frame Secure the unit inside the truck to prevent it from moving and causing damages Do not allow any part of the unit to fall during loading unloading All units have lifting points marke...

Page 6: ...ure 4 Handling of the double circuit unit Alternative handling method 1 Remove before installation 2 Use lifting hooks with closing device exclusively The hooks must be safely fastened before performing the handling 3 Fork lift ...

Page 7: ...oes not exceed the design pressure of the water side heat exchangers and install a safety valve on the pipe of the water 12 Install a suitable expansion CAUTION To avoid damages install a filter that can be inspected on the water pipes at the entry to the heat exchangers Insulation of the pipes The complete water circuit including all the pipes must be insulated to avoid condensate from forming an...

Page 8: ...ponsible for any damages or malfunctions of the equipment The quality of the water must comply with the specifications listed in the following table Circulating water Water supply Possible problems Elements to be checked pH at 25 C 6 8 8 0 6 8 8 0 Corrosion limescale Electrical conductivity mS m at 25 C 40 30 Corrosion limescale Chlorine ion mg Cl l 50 50 Corrosion Sulfate ion mg SO4 l 50 50 Corro...

Page 9: ... installed must therefore ensure that the overall content of water allows the unit t operate continuously and therefore greater environmental comfort The minimum water content per unit must be calculated with a certain approximation using the following formula For units with 2 compressors M litres 12 153 x DT C 22 168 x P kW For units with 4 compressors M litres 0 32 x DT C 1 36 x P kW Where M min...

Page 10: ...f other components of the system or other appliances in general 2 Plan an electrical circuit for the connection of the unit This circuit must be protected with the necessary safety devices that is a main switch an SB fuse on each phase and a leakage towards earth detector The recommended fuses are listed in the wiring diagram provided with the unit Turn off the switch of the main insulator before ...

Page 11: ...equence and operation of all the safety devices The user must keep a log system booklet of the operating data of the unit installed and of all the periodic maintenance and service activities If the operator notes abnormal or unusual operating conditions he is advised to consult the authorized technical service of the manufacturer Periodic maintenance The periodic maintenance activities minimum are...

Page 12: ...rranty All the units are tested at the factory and guaranteed for a specific period of time These units have been developed and constructed according to high quality standards ensuring years of failure free operation However it is important to ensure proper and periodical maintenance in accordance with all the procedures listed in this manual and with good practice of machines maintenance We stron...

Page 13: ...nstalled in an aggressive environment perform this activity monthly The following are considered aggressive environments place with high concentration of industrial exhaust gas in the air Place close to the sea salt air Place close to a desert where there is a risk of sand storms Other aggressive environments 5 Safety valve Check that the cap and seal have not been tampered with Check that the saf...

Page 14: ... collection centres This manual is a technical aid and does not represent a binding offer We cannot guarantee explicitly or implicitly the completeness accuracy or reliability of its contents All data and specifications contained herein may be modified without notice The data communicated at the time of the order shall hold firm The manufacturer shall assume no liability whatsoever for any direct ...

Page 15: ...Frequency Drive condenser pump VFD 3 Way Valve VFD 3 Way Valve VFD Fans D L Limit of charge DI Digital Inputs DO Digital Outputs DPS Digital Setpoint EF External Fault EFS Evaporator Flow Switch GA General Alarm KPC 1 Pump 1 condenser water KPC 2 Pump 2 condenser water KPE 1 Pump 1 evaporator water S O Exclusion of the set point 1 HP Version only Cooling Heating Remote 2 VFD 2 ON OFF Moto Evaporat...

Page 16: ...re A Typical single refrigerant circuit The input and output of the water of the condenser and the evaporator are approximate Consult the dimensional drawings of the unit for the exact hydraulic connections ...

Page 17: ... Figure B Typical single refrigerant circuit of the moto evaporating version The input and output of the water of the evaporator are approximate Consult the dimensional drawings of the unit for the exact hydraulic connections ...

Page 18: ... Figure C Typical single refrigerant circuit for Heat Pump The input and output of the water of the condenser and the evaporator are approximate Consult the dimensional drawings of the unit for the exact hydraulic connections ...

Page 19: ...er 17 Refrigerant inlet connection from the remote condenser 18 Condenser leaving water connection 19 Condenser entering water connection 20 Evaporator leaving water connection 21 Evaporator entering water connection 22 Heat recovery leaving water connection 23 Heat recovery entering water connection DT Discharge temperature control CP High pressure transducer F13 High pressure switch ST Temperatu...

Page 20: ...acy reliability or fitness for particular purpose of its content and the products and services presented therein Specifications are subject to change without prior notice Daikin Europe N V 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 Europe N...

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