Daikin EUWA15HDW15 [6/18] Power supply connection and crankcase heating

Daikin EUWA30HDW15 [6/18] Power supply connection and crankcase heating
5
BEFORE OPERATION
Checks before initial start-up
Make sure that the circuit breaker on the power supply
panel of the unit is switched off.
After the installation of the unit, check the following before switching
on the circuit breaker:
1. Field wiring
Make sure that the field wiring between the local supply panel
and the unit has been carried out according to the instructions
described in the installation manual, according to the wiring
diagrams and according to European and national regulations.
2. Additional interlock contact
An additional interlock contact S11L should be provided (e.g.
flow switch, contact of pump motor contactor). Make sure that
it has been installed between the appropriate terminals (refer
to the wiring diagram supplied with the unit). S11L should be a
normal open contact.
3. Fuses or protection devices
Check that the fuses or the locally installed protection devices
are of the size and type specified in the installation manual.
Make sure that neither a fuse nor a protection device has been
bypassed.
4. Earth wiring
Make sure that the earth wires have been connected properly
and that the earth terminals are tightened.
5. Internal wiring
Visually check the switch boxes on loose connections or
damaged electrical components.
6. Fixation
Check that the unit is properly fixed, to avoid abnormal noises
and vibrations when starting up the unit.
7. Damaged equipment
Check the inside of the unit on damaged components or
squeezed pipes.
8. Refrigerant leak
Check the inside of the unit on refrigerant leakage. If there is a
refrigerant leak, call your local Daikin dealer.
9. Oil leak
Check the compressor on oil leakage. If there is an oil leak, call
your local Daikin dealer.
10. Air inlet/outlet
Check that the air inlet and outlet of the unit is not obstructed
by paper sheets, cardboard, or any other material.
11. Power supply voltage
Check the power supply voltage on the local supply panel. The
voltage should correspond to the voltage on the identification
label of the unit.
Water supply
Fill the water piping, taking into account the minimum water volume
required by the unit. Refer to the "installation manual".
Make sure that the water is of the quality as mentioned in the
installation manual.
Purge the air at the high points of the system and check the
operation of the circulation pump and the flow switch.
Power supply connection and crankcase heating
In order to avoid compressor damage, it is necessary to
switch on the crankcase heater for at least six hours
before starting the compressor after a long period of
standstill.
To switch on the crankcase heater proceed as follows:
1. Switch on the circuit breaker on the local supply panel. Make
sure that the unit is OFF.
2. The crankcase heater is switched on automatically.
3. Check the supply voltage on the supply terminals L1, L2, L3,
(N) by means of a voltmeter. The voltage should correspond to
the voltage indicated on the identification label of the unit. If the
voltmeter reads values which are not within the ranges
specified in the technical data, check the field wiring and
replace the supply cables if necessary.
4. Check the LED on the reverse phase protector. If it lights up,
the phase order is correct. If not, switch off the circuit breaker
and call a licensed electrician to connect the wires of the power
supply cable in the correct phase order.
After six hours, the unit is ready for operation.
General recommendations
Before switching on the unit, read following recommendations:
1. When the complete installation and all necessary settings have
been carried out, close all front panels of the unit.
2. The service panels of the switch boxes may only be opened by
a licensed electrician for maintenance purposes.

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