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Daikin EUWA water chillers Manual

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EUWA(*)5~24KBZW1
Packaged air-cooled water chillers
4PW61653-1 – 07.2010
Installation and operation manual
20
MAINTENANCE
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 must be executed at least once a year. In case the unit is
used for other applications, the checks must 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
1 Air heat exchanger
Remove dust and any other contaminant from the coil fins using
a brush and a blower. Blow from the inside of the unit. Take care
not to bend or damage the fins.
2 Field wiring and power supply
■ Check the power supply voltage on the local supply panel.
The voltage must correspond to the voltage marked on the
identification 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.
3 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.
4 Earth connection
Make sure that the earth wires are still connected properly and
that the earth terminals are tightened.
5 Refrigerant circuit
■ Check for leaks inside the unit. In case a leak is detected, call
your local Daikin dealer.
■ Check the working pressure of the unit. Refer to paragraph
"Switching the unit on" on page 12.
6 Compressor
■ Check on oil leaks. If there is an oil leak, call your local Daikin
dealer.
■ Check for abnormal noises and vibrations. If the compressor
is damaged, call your local Daikin dealer.
7 Fan motor
■ Clean the cooling ribs of the motor.
■ Check on abnormal noises. If the fan or motor are damaged,
call your local Daikin dealer.
8 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).
9 Flowswitch
Make sure that there is no dirt accumulated on the paddle of the
flowswitch
10 Water filter
Clean the water filter.
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.
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.
4PW61653-1_digital_EN.book Page 20 Thursday, August 26, 2010 1:49 PM
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