Installation manual
6
EWLP012~065KBW1N
Condenserless water-cooled water chillers
4PW61665-1 – 07.2010
W
ATER
CHARGE
,
FLOW
AND
QUALITY
To assure proper operation of the unit a minimum water volume is
required in the system and the water flow through the evaporator
must be within the operation range as specified in the table below.
W
ATER
PIPING
INSULATION
The complete water circuit, inclusive all piping, must be insulated to
prevent condensation and reduction of the cooling capacity.
Protect the water piping against water freezing during winter period
(e.g. by using a glycol solution or heatertape).
R
EFRIGERANT
PIPING
INSULATION
To prevent burning injuries by accidental touching the hot (max
135°C) discharge pipe, it must be insulated thoroughly.
A minimum of insulation to protect the liquid pipe from damage is
advisable.
I
NSTALLATION
OF
THE
CONDENSER
INLET
TEMPERATURE
SENSOR
For condenser water inlet control it is possible to enlarge the provided
water sensor cable for a total length of 100 m. It gives the opportunity
to place the water sensor near to the remote watercooled condenser
in order to have a reliable condenser water inlet measurment.
Connecting sensors and power supply
Sensors can be located up to 100 meters distance away from the
controller provided that you use cables with Ø1 mm
2
min. To improve
immunity against noises we recommend using shielded cables (connect
just one end of the shielding to the earth of the electrical panel).
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
K1F,K2F ................. fancontactor
PE.......................... Main earth terminal
S7S........................ Switch for remote cooling/heating change-over
valve or dual setpoint
S9S........................ Switch for remote start/stop or dual setpoint
- - - ......................... 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.
Minimum
water volume (l)
Minimum
water flow
Maximum
water flow
EWLP012
62.1
17 l/min
69 l/min
EWLP020
103
29 l/min
115 l/min
EWLP026
134
38 l/min
153 l/min
EWLP030
155
45 l/min
179 l/min
EWLP040
205
57 l/min
229 l/min
EWLP055
268
77 l/min
307 l/min
EWLP065
311
89 l/min
359 l/min
The water pressure should not exceed the maximum
working pressure of 10 bar.
NOTE
Provide adequate safeguards in the water circuit to
make sure that the water pressure will never exceed
the maximum allowable working pressure.
1
Switch box (with connector X62A on I/O PCB)
2
Sensor cable (length ±1 m)
3
Sensor
4
Remote watercooled condenser
5
Cable
6
Interconnection (IP67)
1
2
3
X62A
X62A
1
3
2
6
5
4
All field wiring and components must be installed by a
licensed electrician and must comply with relevant
European 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
connections (switch off the circuit breaker, remove or
switch off the fuses).
4PW61665-1_digital_EN.book Page 6 Friday, August 27, 2010 2:13 PM
