EWAQ+EWYQ005~007ACV3P
Packaged air-cooled water chillers and
packaged reversible air to water heat pumps
4PW33165-1D
Installation manual
11
S
TART
-
UP
AND
CONFIGURATION
Pre-operation checks
Checks before start-up
(before initial start-up or at restart
after a longer period of standstill)
After the installation of the unit, check the following before switching
on the circuit breaker:
1
Field wiring
Make sure that the field wiring has been carried out according to
the instructions and guidelines given under
2
Internal wiring
Visually check the switch box on loose connections or damaged
electrical components.
3
Fixation
Check that the unit is properly fixed, to avoid abnormal noises
and vibrations.
4
Damaged equipment
Check the inside of the unit on damaged components or
squeezed pipes.
5
Refrigerant leak
Check the inside of the unit on refrigerant leakage. If there is a
refrigerant leak, contact your local Daikin dealer.
6
Power supply voltage
Check the power supply voltage on the local supply panel. The
voltage must correspond to the voltage on the identification label
of the unit.
7
Shut-off valves
Make sure that the shut-off valves are correctly installed and
fully open.
8
Water pressure
Make sure the unit is filled with water and that the water
pressure is approximately 2.0 bar.
9
Protection against freezing
Make sure that in colder climates (ambient temperature can
become lower than 0°C) the unit is protected against freezing by
means of a heater tape or by adding glycol to the water.
Also refer to
"Protecting the water circuit against freezing" on
Powering up the unit
1
Switch on the main isolator switch inside the unit.
2
When power supply to the unit is turned on, “
88
” is displayed on
the digital controller during its initialisation, which might take up
tot 10 seconds. During this process the digital controller cannot
be operated.
Setting the pump speed
The pump speed can be selected on the pump (see
The default setting is highest speed (III). If the water flow in the
system is too high (e.g., noise of running water in the installation) the
speed can be lowered (I or II).
The available external static pressure (ESP, expressed in mH
2
O) in
function of the water flow (l/min) is shown in the graph below.
Switch off the power supply before making any
connections.
3
0
1
2
3
4
5
6
7
7
12
9
11 13 15 17 19 21 23
[l/min]
ESP
[mH
2
O]
25 27 29 31 33 35 37 39
