Installation manual
10
EWAQ+EWYQ005~007ACV3P
Packaged air-cooled water chillers and
packaged reversible air to water heat pumps
4PW33165-1D
Remote ON/OFF and cooling/heating possibilities
Remote control of the unit can be done by a voltage free contact.
Depending on the setting on the digital controller, the unit will operate
in cooling or in heating mode.
Connection of the thermostat cable
Connection of the thermostat cable depends on the application.
See also
"Typical application examples" on page 2
Thermostat requirements
■
Contact voltage: 230 V.
Procedure
1
Connect the thermostat cable to the appropriate terminals as
shown on the wiring diagram.
2
Fix the cable with cable ties to the cable tie mountings to ensure
strain relief.
The following table summarizes the required configuration and
thermostat wiring at the terminal block in the switch box. Pump
operation is listed in the third column. The three last columns indicate
whether the following functionality is available on the user interface
(UI) or handled by the thermostat (T):
•
space heating or cooling on/off (
o
)
•
heating/cooling changeover (
=
)
•
heating and cooling schedule timers (
pr
)
Heating/cooling thermostat
Remote ON/OFF
NOTE
■
When a room thermostat is connected to the unit,
the heating and cooling schedule timers are never
available. Other schedule timers are not affected.
For more information on the schedule timers, refer
to the operation manual.
■
When a room thermostat is connected to the unit,
and the
=
button or
o
button is pressed, the
centralised control indicator
e
will flash to
indicate that the room thermostat has priority and
controls on/off operation and change over
operation.
H C
Terminal block
H C
th
N
8
9 10
Terminal block
H C
sw
N
8
9 10
Thermostat
Configuration
Pump
operation
o
o
o
o
=
=
=
=
p
p
p
pr
r
r
r
No thermostat
wiring:
on when unit is
on
UI
UI
UI
Thermostat with
heating/cooling
switch
wiring: on
when
heating
request or
cooling request
by room
thermostat
T
T
—
Remote
ON/OFF
wiring: on
when
remote on
T
—
—
th =
Thermostat contact
C =
Cooling contact
H =
Heating contact
N =
neutral
Terminal block
H C N
8
9 10
H C
Terminal block
H C
th
N
8
9 10
Terminal block
H C
sw
N
8
9 10
