Typical Application Examples; Application 1; Application 2 - Daikin EWAQ-ACV3 Installation Manual

T
YPICAL APPLICATION EXAMPLES
The application examples given below are for illustration purposes
only.

Application 1

Cooling and heating application (without room thermostat)
1 2 3 4 5
5 6
1 Reversible heat pump
2 Plate heat exchanger
3 Expansion vessel
4 Pump
5 Shut-off valve
6 Motorised valve (field supply)
The digital controller (DC) is installed indoors and allows the user to
turn the unit (1) ON or OFF, to select between cooling and heating
mode (only in case of a heat pump model) and to set the water
temperature. When the unit is turned on, it will provide water at the
set temperature to the fan coil units (FCU1..3).
EWAQ+EWYQ009~011ACV3 + EWAQ+EWYQ009~013ACW1
Packaged air-cooled water chillers and packaged
reversible air to water heatpumps
4PW51587-1A
DC
FCU1 FCU2 FCU3
M M M
RT1 RT2 RT3
7 Bypass valve
FCU1..3 Fan coil unit
(field supply)
DC Digital controller
RT1..3 Room thermostat
(field supply)

Application 2

Cooling and heating application with a room thermostat suitable for
cooling/heating changeover connected to the unit.
1 2 3 4 5
7
7
1 Reversible heat pump
2 Plate heat exchanger
3 Expansion vessel
4 Pump
5 Shut-off valve
6 Collector (field supply)
Pump operation and heating and cooling (cooling and heating
application with a room thermostat suitable for cooling/heating
changeover connected to the unit)
According to the season, the customer will select cooling or
heating on the room thermostat (T). This selection is not
possible by operating the user interface.
When cooling/heating is requested by the room thermostat (T),
the pump will start operating and the unit will switch to "cooling
mode"/"heating mode". The unit will start operating to achieve
the target leaving cold/hot water temperature.
The ON/OFF setting of the heating/cooling operation is done by
the room thermostat and cannot be done by the user interface
on the unit.
Make sure to connect the thermostat wires to the correct
terminals (see
page 13).
T
6
FCU1
FCU2
FCU3
7 Shut-off valve
FCU1..3 Fan coil unit
(field supply)
T Room thermostat or
room thermostat with
cooling/heating switch
(field supply)
"Connection of the thermostat cable" on
Installation manual
6