Installation and operation manual
15
EUWAC5~10FZ
Packaged air-cooled water chillers
4PW14037-1D
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
1
Condenser coil
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 should 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
in the chapter “
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
Condenser fan motor
■
Clean the cooling ribs and the cooling grid of the motor.
■
Check on abnormal noises. If the fan or motor are damaged,
call your local Daikin dealer.
8
Air in/outlet ducts of unit
■
Clean the inside of the ducting (use a vacuum cleaner, avoid
dirt and dust from entering the condenser coil).
■
Check if the ducts are properly fixed and do not make contact
with the unit (may cause abnormal noises or vibrations).
■
Make sure that the flexible connection between the ducts and
the unit is not damaged or perforated. Replace it if
necessary.
9
V-belt transmission of condenser fan motor
(for 10 units only)
■
Check that the V-belt is not worn
out. Replace if necessary.
■
Check the tension of the V-belt.
When the belt is slightly
pressed with the fingers, the
relaxation of the belt may not
exceed 10 mm.
10
Water supply
■
Check if the water connection is still well fixed.
■
Check the water quality (refer to the chapter “
” for specifications of the water quality).
11
Drain disposal
■
Check the proper functioning of the drain. Make sure that
water evacuates freely. Clean the drain pan and piping
thoroughly.
Disposal requirements
Dismantling of the unit and treatment of the refrigerant, oil and even-
tual other parts, should be done in accordance with the relevant local
and national regulations.
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.
