Operation manual
15
EWWP014~065KBW1N
Packaged water-cooled water chillers
4PW61660-1A – 04.2012
Symptom 6: Unit runs continuously and the water temperature remains
higher than the temperature set on the controller
Symptom 7: Excessive noises and vibrations of the unit
M
AINTENANCE
In order to ensure optimal availability of the unit, a number of checks
and inspections on the unit and the field wiring have to be carried out
at regular intervals.
If the unit is used for air conditioning application, the described
checks should be executed at least once a year. In case the unit is
used for other applications, the checks should be executed every
4 months.
Important information regarding the refrigerant used
This product contains fluorinated greenhouse gases covered by the
Kyoto Protocol.
Refrigerant type:
R407C
GWP
(1)
value:
1652.5
(1)
GWP = global warming potential
Periodical inspections for refrigerant leaks may be required
depending on European or local legislation. Please contact your local
dealer for more information.
Maintenance activities
■
Field wiring and power supply
•
Check the power supply voltage on the local supply panel. The
voltage should correspond to the voltage marked on the identifi-
cation label of the unit.
•
Check the connections and make sure they are properly fixed.
•
Check the proper operation of the circuit breaker and the earth
leak detector provided on the local supply panel.
■
Internal wiring of the unit
Visually check the switch box on loose connections (terminals
and components). Make sure that the electrical components are
not damaged or loose.
■
Earth connection
Make sure that the earth wires are still connected properly and
that the earth terminals are tightened.
■
Refrigerant circuit
•
Check for leaks inside the unit. In case a leak is detected, call
your local dealer.
•
Check the working pressure of the unit. Refer to paragraph
"Switching the unit on" on page 7
.
■
Compressor
•
Check on oil leaks. If there is an oil leak, call your local dealer.
•
Check for abnormal noises and vibrations. If the compressor is
damaged, call your local dealer.
■
Water supply
•
Check if the water connection is still well fixed.
•
Check the water quality (refer to the installation manual of the unit
for specifications of the water quality).
■
Water filters
•
Check if the mesh width is 1 mm maximum.
Disposal requirements
Dismantling of the unit, treatment of the refrigerant, of oil and of other
parts must be done in accordance with relevant local and national
legislation.
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTION
The temperature setting on the
controller is too low, respectively too
high.
Check and adjust the temperature
setting.
The heat production, respectively
cold production in the water circuit is
too high.
The cooling, respectively heating
capacity of the unit is too low. Call
your local dealer.
Water flow is too high.
Recalculate the water flow.
P
OSSIBLE
CAUSES
C
ORRECTIVE
ACTION
Unit has not been fixed properly.
Fix the unit as described in the
installation manual.
Before carrying out any maintenance or repair activity,
always switch off the circuit breaker on the supply panel,
remove the fuses or open the protection devices of the
unit.
Do never clean the unit with water under pressure.
The wiring and power supply must be checked by a
licensed electrician.
