EWLP012~065KBW1N
Condenserless water-cooled water chillers
4PW61665-1 – 07.2010
Installation manual
7
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
system. It is the responsibility of the installer or user of the
equipment 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
.
■
Only for EWLP026~065: Equipment complying with
EN/IEC 61000-3-12
(2)
Interconnection cables
■
Voltage free contacts
The PCB is provided with some voltage free contacts to indicate
the status of the unit.
The PCB is also provided with a voltage free contact for the
operation of fans.
When the compressor is running, the contact is closed and a fan
contact can be activated.
These voltage free contacts can be wired as described on the
wiring diagram.
■
Remote inputs
Besides the voltage free contacts, there are also possibilities to
install remote inputs.
They can be installed as shown on the wiring diagram.
B
EFORE
STARTING
I do confirm having executed and checked all the above
mentioned items.
Keep for future reference
.
H
OW
TO
CONTINUE
After installation and connection of the packaged water-cooled water
chiller, the complete system must be checked and tested as
described in "Checks before initial start-up" in the operation manual
supplied with the unit.
Fill out the brief operation instructions form and fix it visibly near the
operating site of the refrigeration system.
(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
)
EWLP012
0.28
EWLP020
0.23
EWLP026
0.22
EWLP030
0.21
EWLP040
0.22
EWLP055
0.21
EWLP065
0.20
(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.
The unit should not be started, not even for a very short
period of time, before the following pre-commissioning
checklist is filled out completely.
tick
✓
when
checked
standard steps to go through before starting the unit
■
1
Check for
external damage
.
■
2
Install
main fuses, earth leak detector
and
main switch
.
Recommended fuses: aM according to IEC standard 269-2.
Refer to the wiring diagram for size
.
■
3
Supply the main voltage and check if it is within the allowable
±10% limits of the nameplate rating.
The electrical
main power supply
must 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.
Refer to the wiring diagram, terminals N, L1, L2 and L3.
■
4
Supply water to the evaporator and verify if
waterflow
is within
the limits as given in the table under
■
5
The piping must be completely
purged
. See also chapter
"Checking the water circuit" on page 5
■
6
Connect the
flowswitch
and
pumpcontact
, so that the unit
can only come in operation when the waterpumps are running
and the waterflow is sufficient. Make sure a water filter is
installed before the water inlet of the unit.
■
7
Connect the optional field wiring for
pumps start-stop
.
■
8
Connect the optional field wiring for
remote control
.
NOTE
■
Try to reduce the drilling in the unit to a minimum.
If drilling is impreventable, remove the iron filling
thoroughly in order to prevent surface rust!
■
It is necessary to read the operation manual deli-
vered with the unit before operating the unit. It will
contribute to understand the operation of the unit
and its electronic controller.
■
Verify on the wiring diagram all electrical actions
mentioned above, in order to understand the
operation of the unit more deeply.
■
Close all switch box doors after installation of the
unit.
Date
Signature
4PW61665-1_digital_EN.book Page 7 Friday, August 27, 2010 2:13 PM
