Installation and operation manual
7
EUWAC5~10FZ
Packaged air-cooled water chillers
4PW14037-1D
B
EFORE
OPERATION
Checks before initial start-up
After the installation of the water chiller, check the following before
switching on the circuit breaker:
1
Field wiring
Make sure that the field wiring between the local supply panel
and the water chiller has been carried out according to the
instructions described in the chapter “
according to the wiring diagram and according to European and
national regulations.
2
Additional interlock contact
An additional interlock contact S11L should be provided (e.g.
flow switch or contact of pump motor contactor). Make sure that
it has been installed between the appropriate terminals (refer to
the wiring diagram supplied with the unit). S11L should be a
normal open contact.
3
Fuses or protection devices
Check that the fuses or the locally installed protection devices
are of the size and type specified in the chapter “
”. Make sure that neither a fuse nor a protection device has
been bypassed.
4
Earth wiring
Make sure that the earth wires have been connected properly
and that the earth terminals are tightened.
5
Internal wiring
Visually check the switch box on loose connections or damaged
electrical components.
6
Fixation
Check that the unit is properly fixed, to avoid abnormal noises
and vibrations when starting up the unit.
7
Damaged equipment
Check the inside of the unit on damaged components or
squeezed pipes.
8
Refrigerant leak
Check the inside of the unit on refrigerant leakage. If there is a
refrigerant leak, call your local Daikin dealer.
9
Oil leak
Check the compressor on oil leakage. If there is an oil leak, call
your local Daikin dealer.
10
Air inlet/outlet
Check that the air inlet and outlet of the unit is not obstructed by
paper sheets, cardboard, or any other material. Clean the inside
of the ducts and make sure that the air ducts are properly
installed.
11
Protective guard
Check that the protective guard(s) is (are) properly installed in
front of the air outlet(s).
12
Drain disposal
Check the proper operation of the drain. Pour some water into
the drain pan and check whether the water evacuates freely
through the drain.
Water supply
Fill the water piping, taking into account the minimum water volume
required by the unit. Refer to the chapter “
Make sure that the water is of the quality as mentioned in the chapter
“
Purge the air at the high points of the system and check the operation
of the circulation pump and the flow switch.
Power supply connection and crankcase heating
To switch on the crankcase heater proceed as follows:
1
Switch on the circuit breaker on the local supply panel. Make
sure that the unit is “OFF”.
2
The crankcase heater is switched on automatically.
3
Check the supply voltage on the supply terminals L1, L2, L3, (N)
by means of a voltmeter. The voltage should correspond to the
voltage indicated on the identification label of the unit. If the
voltmeter reads values which are not within the ranges specified
in the technical data, check the field wiring and replace the
supply cables if necessary.
4
Check the LED on the reverse phase protector. If it lights up, the
phase order is correct. If not, switch off the circuit breaker and
call a licensed electrician to connect the wires of the power
supply cable in the correct phase order.
After six hours, the unit is ready for operation.
General recommendations
Before switching on the unit, read following recommendations:
1
When the complete installation and all necessary settings have
been carried out, close all front panels of the unit.
2
The service panel of the switch box may only be opened by a
licensed electrician for maintenance purposes.
O
PERATION
The EUWAC units are equipped with a digital controller offering a
user-friendly way to set up, use and maintain the unit.
This part of the manual has a task-oriented, modular structure. Apart
from the first section, which gives a brief description of the controller
itself, each section or subsection deals with a specific task you can
perform with the unit.
Make sure that the circuit breaker on the power supply
panel of the water chiller is switched off.
In order to avoid compressor damage, it is necessary to
switch on the crankcase heater for at least six hours
before starting the compressor after a long period of stand-
still.
