Water Pipework - Daikin EWAQ-ACV3 Installation Manual

Switch box main components (door 2)
7
A
K4M
B
3
10
S12M
12
1. Main PCB
The main PCB (Printed Circuit Board) controls the functioning of
the unit.
2. Terminal blocks
The terminal blocks allow easy connection of field wiring.
3. Cable tie mountings
The cable tie mountings allow to fix the field wiring with cable
ties to the switch box to ensure strain relief.
4. PCB fuse FU1
5. DIP switch SS2
The DIP switch SS2 provides 4 toggle switches to configure
certain installation parameters.
6. Pump fuse FU2 (in line fuse)
7. Pump relay K4M
8. Transformer TR1
9. A4P
Remote alarm input/output PCB (only for installations with
remote alarm kit).
10. Conduit hole to pass through the main power supply cable to the
compressor module.
11. Conduit hole to pass through the thermistor cable and user
interface cable (and benefit kWh rate cable).
12. Conduit hole to pass through the installation power supply
wiring.
13. Conduit hole to pass through optional input/output PCB
connection wiring.
NOTE The electrical wiring diagram can be found on the
inside of the switch box cover.
EWAQ+EWYQ009~011ACV3 + EWAQ+EWYQ009~013ACW1
Packaged air-cooled water chillers and packaged
reversible air to water heatpumps
4PW51587-1A
A
B
6 4 1 8
TR1
5
9
A4P
A1P
3
13
2
3
11

Water pipework

In case of a power supply failure or pump operating failure,
drain the system (as suggested in the figure below).
A
When water is at standstill inside the system, freezing up is
very likely to happen and damaging the system in the
process.
Checking the water circuit
The units are equipped with a water inlet and water outlet for
connection to a water circuit. This circuit must be provided by a
licensed technician and must comply with all relevant European and
national regulations.
The unit is only to be used in a closed water system.
Application in an open water circuit can lead to excessive
corrosion of the water piping.
Before continuing the installation of the unit, check the following
points:
The maximum water pressure is 3 bar.
Drain taps must be provided at all low points of the system to
permit complete drainage of the circuit during maintenance.
A drain valve is provided in the unit to drain the water from the
unit water system.
Air vents must be provided at all high points of the system. The
vents should be located at points which are easily accessible for
servicing. An automatic air purge is provided inside the unit.
Check that this air purge valve is not tightened too much so that
automatic release of air in the water circuit remains possible.
Take care that the components installed in the field piping can
withstand the water pressure.
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Installation manual
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