Before Starting - Daikin EWWD120J-SS Installations- Betriebs Und Wartungshandbuch

16. BEFORE STARTING

The unit should not be started, not even for a very short
period of time, before the following pre-commissioning
checklist is filled out completely.
tick  when
standard steps to go through before
checked starting the unit

1 Check for external damage.

2 Open all shut-off valves.

3 Install main fuses, earth leak detector and
main switch. Recommended fuses: aM
according to IEC standard 269-2.
Refer to the wiring diagram for size.

4 Supply the main voltage and check if it is
within the allowable ±10% limits of the
nameplate rating.
The electrical main power supply should
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.
Refer to the wiring diagram, terminals L1, L2
and L3.

5 Supply water to the evaporator and verify if
waterflow is within the limits as given in the
table under "Water charge, flow and quality".

6 The piping must be completely purged. See
also chapter "Preparing, checking and
connecting the water circuit".

7 Connect the pump contact(s) in series with
the contact of the flow switch(es), so that the
unit can only come in operation when the
water pumps are running, and the water flow
is sufficient.

8 Check the oil level in the compressors.

9 Install the filter kit(s) supplied with the
unit in front of the evaporator(s) water inlet.

10 Check that all the water sensors are
correctly fixed into the heat exchanger (see
also the sticker attached to the heat
exchanger).
NOTE It is necessary to read the operation manual
delivered with the unit before operating the unit.
It will contribute to understand the operation of
the unit and its electronic controller.
Close all switch box doors after installation of
the unit.
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