Installation manual
4
EWWQ049~06 ECB2+3MUBW
Packaged water-cooled water chillers
D-EIMHP01008-17EU
Connection of the water-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.
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
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
.
■
EN/IEC 61000-3-12
(2)
Interconnection cables
■
In addition to the power supply cable, a cable must be provided
for the connection of the flow switch.
Be sure to interlock so, that the compressor will not come into
operation unless the waterpump is operated. For this purpose 2
spare terminals are provided in the switch box. Refer to the
wiring diagram supplied with the unit.
■
Voltage free contacts
The controller is provided with some voltage free contacts to
indicate the status of the unit. 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 should 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
)
EWWQ049
0.22
EWWQ064
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 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.
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 should be completely purged. See also chapter
"Checking the water circuit" on page 2
■
6
Connect the flowswitch and pumpcontact in series, so that
the unit can only come in operation when the waterpumps are
running and the waterflow is sufficient.
■
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
