EWAQ+EWYQ005~007ACV3P
Packaged air-cooled water chillers and
packaged reversible air to water heat pumps
4PW33165-1D
Installation manual
3
O
VERVIEW
OF
THE
UNIT
Opening of the unit
To have access to all main components for installation and servicing,
the top and front cover of the unit must be removed.
■
To open the top cover (1), loosen the 6 screws and lift the top
cover.
■
To open the front cover (2), loosen the four screws and unhitch
the front cover.
■
To gain access to the switch box’ internals – e.g. to connect the
field wiring – the switch box service panel (3) can be removed.
Thereto, loosen the two screws and lift the switch box service
panel.
Main components
1
Switch box
The switch box contains connection terminals for the power
supply and digital controller, and the main electronic and
electrical parts of the unit.
2
Main isolator switch
The main isolator switch allows to cut off all electrical power to
the unit.
3
Heat exchanger
4
Water inlet connection (1” MBSP)
5
Water outlet connection (1” MBSP)
6
Pump
The pump circulates the water in the water circuit.
7
Manometer
The manometer allows readout of the water pressure in the
water circuit.
8
Expansion vessel (6 litre)
The water in the water circuit expands with rising temperatures.
The expansion vessel stabilises the pressure changes with
changing water temperatures by giving free space to the
changing water volume.
9
Expansion vessel service point
The service point allows connection of a dry nitrogen cylinder to
adjust the expansion vessel pre-pressure if necessary.
10
Drain and fill valve (2x)
11
Air purge valve
Remaining air in the water circuit will be automatically removed
via the air purge valve.
12
Water filter
The water filter removes dirt from the water to prevent damage
to the pump or blockage of the evaporator. The water filter
should be cleaned on a regular base. See
Switch off the power supply before removing the
switch box service panel.
1
2
3
1
3
13b
18
10
2
12
13a
11
7
17
8
4
5
14
15
9
6
