Daikin EUWAC8FZW1, Installation And Operation Manual

EUWAC5~10FZ

Packaged air-cooled water chillers

4PW14037-1D

Installation and operation manual

4

P

IPING

INSULATION

The complete water circuit, inclusive all piping, must be insulated to
prevent condensation and reduction of the cooling capacity. Take into
account the following points when insulating the piping:

1

Provide a separate insulation for the water inlet and the water
outlet piping.

2

Thoroughly insulate around the pipe connections.

3

Use Armaflex material with thickness of 9 mm.

Protect the water piping against water freezing during winter period
(e.g. by using a glycol solution).

F

IELD

WIRING

Parts table

L1,2,3................. Live line

N ........................ Neutral

F1,2,3U.............. Field fuses

H1P.................... Indication lamp alarm

H3P.................... Indication lamp operation compressor

KP...................... Pumpcontactor

PE...................... Main earth terminal

S9S.................... Switch for remote start/stop

S10L .................. Flowswitch

S11L .................. Contact that closes if the pump is working

S12S.................. Main isolator switch

- - - ..................... Field wiring

Power circuit and cable requirements

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 (see table below) must be provided for
connection of the packaged air-cooled water chiller. 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.

Connection of the packaged air-cooled water chiller
power supply

1

Using the appropriate cable, connect the power circuit to the (N),
L1, L2 and L3 terminals of the unit as shown on the wiring
diagram.

2

Connect the earth conductor (yellow/green) to the earthing
terminal PE.

Point for attention regarding quality of the public 
electric power supply

■

This equipment complies with EN/IEC 61000-3-11

(1)

  provided

that the system impedance Z

sys

 is less than or equal to Z

max

 at

the interface point between the user's supply and the public sys-
tem. It is the responsibility of the installer or user of the equip-
ment to ensure, by consultation with the distribution network
operator if necessary, that the equipment is connected only to a
supply with a system impedance Z

sys

 less than or equal to Z

max

.

■

Equipment complying with EN/IEC 61000-3-12

(2)

Cable for flow switch

Be sure to interlock so that the compressor will not come into
operation unless the water pump is operated. For this purpose 2
spare terminals are provided in the switch box (refer to the wiring
diagram supplied with the unit).

H

OW

TO

CONTINUE

After installation and connection of the packaged air-cooled water
chiller, the unit should be checked and tested as described in

"Checks before initial start-up" on page 7

  in the chapter 

"Before

operation"

.

NOTE

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

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.

Phase and frequency

Voltage

EUWAC5

3N~ 50 Hz

400 V

EUWAC8

3N~ 50 Hz

400 V

EUWAC10

3N~ 50 Hz

400 V

NOTE

Select the power cable in accordance with relevant
local and national regulations.

Switch off the main isolator switch before making any
connections (switch off the circuit breaker and remove or
switch off the fuses).

(1) European/International Technical Standard setting the limits for voltage 

changes, voltage fluctuations and flicker in public low-voltage supply 
systems for equipment with rated current 

≤

75 A.

Z

max

 (

Ω

)

EUWAC5

0.15

EUWAC8

0.06

EUWAC10

0.04

(2) European/International Technical Standard setting the limits for harmonic 

currents produced by equipment connected to public low-voltage systems 
with input current >16 A and 

≤

75 A per phase.