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Installation manual

EWAQ+EWYQ009~0 EWAQ+EWYQ009~013ACW1

Packaged air-cooled water chillers and packaged

reversible air to water heatpumps

4PW51587-1A

Field wiring

Precautions on electrical wiring work

■

Use only copper wires.

■

Never squeeze bundled cables into a unit.

■

Fix cables so that cables do not make contact with the pipes
(especially on high pressure side).

■

Secure the electrical wiring with cable ties as shown in

figure 2

so that it does not come in contact with the piping, particularly
on the high-pressure side.

■

Make sure no external pressure is applied to the terminal
connectors.

■

For W1

Make sure to connect power supply cables in normal phase. If
connected in reverse phase, the remote controller indicates "

and the equipment cannot operate. Change any two of the three
power supply cables (L1, L2, L3) to correct phase.

■

As this unit is equipped with an inverter, installing a phase
advancing capacitor not only will deteriorate power factor
improvement effect, but also may cause capacitor abnormal
heating accident due to high-frequency waves. Therefore, never
install a phase advancing capacitor.

■

When installing the earth leakage circuit breaker make sure that
it is compatible with the inverter (resistant to high frequency
electrical noise) to avoid unnecessary opening of the earth
leakage circuit breaker.

Overview

The illustration below gives an overview of the required field wiring
between several parts of the installation. Refer also to

"Typical

application examples" on page 6

Internal wiring - Parts table

Refer to the internal wiring diagram supplied with the unit (on the
inside of the switch box cover). The abbreviations used are listed
below.

Door 1 compressor compartment and electrical parts

V3 models only
A1P.................. Main PCB
A2P.................. Inverter PCB
A3P.................. Noise filter PCB
A4P.................. PCB
BS1~BS4 ......... Push button switch
C1~C4 ............. Capacitor
DS1.................. DIP switch
E1HC ............... Crankcase heater
F1U,F3U,F4U .. Fuse 6.3 A T 250 V
F6U.................. Fuse 5.0 A T 250 V
H1P~H7P ........ Orange LED service monitor (A2P)

H2P: prepare, test = flickering
H2P: malfunction detection = light up

HAP (A1P) ....... Green LED service monitor
K1R.................. Magnetic relay (Y1S)
K4R.................. Magnetic relay (E1HC)
K10R,K11R...... Magnetic relay
L1R .................. Reactor
M1C ................. Motor (compressor)
M1F ................. Motor (upper fan)
M2F ................. Motor (lower fan)
PS.................... Switching power supply
R1,R2 .............. Resistor
R1T.................. Thermistor (air)

WARNING

■

Switch off the power supply before making any
connections.

■

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 supply. Never use a
power supply shared by another appliance.

■

Be sure to establish an earth. Do not earth the unit to
a utility pipe, surge absorber, or telephone earth.
Incomplete earth may cause electrical shock.

■

Be sure to install an earth leakage protector (30 mA).
Failure to do so may cause electrical shock.

High voltage

To avoid electrical shock, make sure to disconnect the
power supply 1 minute or more before servicing the
electrical parts. Even after 1 minute, always measure the
voltage at the terminals of main circuit capacitors or
electrical parts and, before touching, make sure that those
voltages are 50 V DC or less.

NOTE

The earth leakage circuit breaker must be a high-
speed type breaker of 30 mA (<0.1 s).

Single power supply for unit

Unit

User interface

Room thermostat (field supply, optional)

Item

Description

AC/
DC

Required
number of
conductors

Maximum
running
current

Power supply cable for unit