Manual Daikin EUWA water chillers (page 11 of 28) (English)

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EUWA(*)5~24KBZW1

Packaged air-cooled water chillers

4PW61653-1 – 07.2010

Installation and operation manual

Charging water

For all versions

1 Connect the water supply to the drain and ﬁll valve

2 Open the pressure regulating valve (only for EUWAP and

EUWAB) and shut-off valves

3 Use the air purge valves on the unit and purge valves installed in

the highest places in the circuit to remove all air when ﬁlling the

system

Only for EUWAP, EUWAB versions

Water must be ﬁlled until the system reaches the required

pressure (Pr). The pressure can be read on the manometer.

The value of the required water pressure (Pr) is depending on the

total water volume in the system and the pressure in the expansion

vessel (see previous chapter).

Refer to ﬁgure 7 – Required water pressure in function of water

volume and pre-pressure:

1. Calculate the total water volume in the entire system.

2. Check in ﬁgure 7 where the horizontal line of the set prepressure

(Pg) cuts the vertical line of the system water volume.

3. At the cutting point, read the required water pressure (Pr) from the

lines in the ﬁgure.

Example 1

Total system water volume=130 l

Highest point of circuit above the EUWA=5 m

Pg=(5/10+0.3)=0.8 bar

Pr=±2.0 bar

Example 2

Total system water volume=190 l

Highest point of circuit above the EUWA unit=5 m

Pg=(5/10+0.3)=0.8 bar

Pr=±1.7 bar

PIPING INSULATION

The complete water circuit, inclusive all piping, must be insulated to

prevent condensation and reduction of the cooling capacity.

FIELD WIRING

Parts table

Refer to the wiring diagram supplied with the unit.

Following parts are to be connected during installation:

N ............................Neutral

P.............................Main earth terminal

F1,F2,F3 ................Main fuses (ﬁeld supply, obligatory)

H3P........................Indication lamp alarm (ﬁeld supply, not

obligatory)

H5P,H6P.................Indication lamp compr circuit 1, circuit 2 (ﬁeld

supply, not obligatory)

S7S ........................Switch for cool/heat selection or dual setpoint

selection (ﬁeld supply, not obligatory)

S9S ........................Switch for remote start/stop selection or dual

setpoint selection (ﬁeld supply, not obligatory)

E5H........................Field heater (ﬁeld supply, optional)

X2M (E5H) .............Terminal for ﬁeld heater connection (optional)

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

Power circuit and cable requirements

A power circuit must be provided for connection of the unit. This

circuit must be protected with the required safety devices, i.e. a slow

blow fuse on each phase and an earth leak detector. For maximum

cable section (mm

) refer to the table.

Connection of the power supply

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

L1, L2 and L3 terminals of the main switch as shown on the

wiring diagram.

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

terminal PE.

A Water volume (l)

B Installation height difference (m)

C Pre-pressure

D Factory setting (1.5 bar)

NOTE

In this example it is allowed to keep the pre-pressure

factory setting from 1.5 bar. In this case the initial

water-pressure must be ±2.2 bar

NOTE

In this example it is not allowed to keep the pre-

pressure factory setting from 1.5 bar.

NOTE

A terminal is foreseen in the switchbox on which a

heater (tape) can be connected for preventing the water

piping from freezing during the cold weather months.

Refer to the wiring diagram supplied with the unit.

All ﬁeld wiring and components must be installed by a

licensed electrician and must comply with relevant Euro-

pean 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.

Description Legend 5~24 Hp

Powerlines L1, L2, L3, N 10

Main earth cable PE 10

NOTE

Select the power cable in accordance with relevant

local and national regulations.

Switch off the main isolator switch before making any

connections.

For units equipped with freeze protection:

Keep in mind that the heaters are automatically switched

off when the main isolator switch is switched off. For this

reason the main switch should be switched on during the

cold weather months.

4PW61653-1_digital_EN.book Page 8 Thursday, August 26, 2010 1:49 PM

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Daikin EUWA water chillers Manual

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