Installation manual
4
EWWP014~065KAW1N
Packaged water-cooled water chillers
4PW30038-1
F
IELD
WIRING
Parts table
F1,2,3 .....................Main fuses for the unit
H3P ........................Indication lamp alarm
H4P, H5P ................Indication lamp operation compressor circuit 1,
circuit 2
PE ..........................Main earth terminal
S7S ........................Remote cooling/heating change-over valve
S9S ........................Remote start/stop switch
- - -..........................Field wiring
Power circuit and cable requirements
1
The electrical power supply to the unit 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.
2
A power circuit must be provided for connection of the unit. This
circuit must be protected with the required safety devices, i.e. a
circuit breaker, a slow blow fuse on each phase and an earth
leak detector. Recommended fuses are mentioned on the wiring
diagram supplied with the unit.
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 (cable section 2.5~10 mm
2
).
2
Connect the earth conductor (yellow/green) to the earthing
terminal PE.
Interconnection cables
■
Voltage free contacts
The PCB 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 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.
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.
Switch off the main isolator switch before making any con-
nections (switch off the circuit breaker, remove or switch off
the fuses).
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
"Water charge, flow and
quality" on page 3
.
■
5
The piping must be completely purged. See also chapter
"Checking the water circuit" on page 2
.
■
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
