Application 4 - Daikin EKHBHE008BA3V3 Installation Manual

Pump operation and space heating and cooling
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 space heating/cooling is requested by the room thermostat
(T), the pump will start operating and the indoor unit (2) will switch to
"heating mode"/"cooling mode". The outdoor unit (1) will start
operating to achieve the target leaving hot/cold water temperature.
In case of cooling mode, the 2-way valve (13) will close as to prevent
cold water running through the floor heating loops (FHL).
Make sure to connect the thermostat wires to the
NOTE
correct terminals (see
cable" on page
toggle switches correctly (see
installation configuration" on page
Wiring of the 2-way valve (13) is different for a NC
NOTE
(normal closed) valve and a NO (normal open) valve!
Make sure to connect to the correct terminal numbers
as detailed on the wiring diagram.
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
indoor unit.
Domestic water heating
Domestic water heating is as described under
page 5.

Application 4

Space cooling and heating application without the room thermostat
connected to the indoor unit, but with the heating only room
thermostat (set heating only) controlling the floor heating and the
heating/cooling thermostat (set heating/cooling) controlling the fan
coil units. Heating is provided through floor heating loops and fan coil
units. Cooling is provided through the fan coil units only.
1 2 3 4 5
7
Installation manual
6
"Connection of the thermostat
19) and to configure the DIP switch
"Room thermostat
21).
"Application 2" on
T4
T5
T6
FCU1
FCU2
T
FCU3
13 14 6
M M
FHL1
FHL2
FHL3
1 Outdoor unit
2 Indoor unit
3 Heat exchanger
4 Pump
5 Shut-off valve
6 Collector (field supply)
7 Shut-off valve
9 By-pass valve (field supply)
13 Motorised 2-way valve to
shut off the floor heating
loops during cooling
operation (field supply)
Pump operation
With no thermostat connected to the indoor unit (2), the pump (4) can
be configured to operate either as long as the indoor unit is on, or
until the required water temperature is reached.
NOTE Details on pump configuration can be found under
"Pump operation configuration" on page
Space heating and cooling
According to the season, the customer will select heating or cooling
through the user interface on the indoor unit.
The outdoor unit (1) will operate in heating mode or cooling mode to
achieve the target leaving water temperature.
With the unit in heating mode, the 2-way valve (13) is open. Hot water
is provided to both the fan coil units and the floor heating loops.
With the unit in cooling mode, the 2-way valve (13) is closed to
prevent cold water running through the floor heating loops (FHL).
When closing several loops in the system by remotely
controlled valves, it might be required to install a by-pass
valve (9) to avoid the flow switch safety device from being
activated. See also
Wiring of the 2-way valve (13) is different for a NC (normal
9
6
closed) valve and a NO (normal open) valve! Make sure to
connect to the correct terminal numbers as detailed on the
wiring diagram.
The ON/OFF setting of the heating/cooling operation is done by the
user interface on the indoor unit.
14 Motorised 2-way
valve for activation of
the room thermostat
(field supply)
FCU1..3 Fan coil unit with
thermostat (optional)
FHL1..3 Floor heating loop
T Heating only room
thermostat (optional)
T4..6 Individual room
thermostat for fan coil
heated/cooled room
(optional)
21.
"Application 2" on page 5.
EKHBH/XE008BA
Indoor unit for air to water heat pump system
4PW56301-1A