Typical Application Examples; Application 1; Application 2 - Daikin EKHBH008BB Series Installation Manual

3.4. Typical application examples

The application examples given below are for illustration purposes
only.

Application 1

Space heating only application with the room thermostat connected
to the indoor unit.
T
1 2 3 4
1 Outdoor unit
2 Indoor unit
3 Heat exchanger
4 Backup heater
5 Pump
6 Shut-off valve
7 Collector (field supply)
FHL1...3 Floor heating loop
T Room thermostat (optional)
Pump operation and space heating
When the room thermostat (T) is connected to the indoor unit, the
pump (5) will operate when there is a heating request from the room
thermostat, and the outdoor unit will start operating to achieve the
target leaving water temperature as set on the user interface.
When the room temperature is above the thermostat set point, the
outdoor unit and pump will stop operating.
NOTICE
Make sure to connect the thermostat wires to the correct
terminals (see "Connection of the thermostat cable" on
page 21) and to configure the DIP switch toggle switches
correctly (see "8.2. Room
configuration" on page
Installation manual
5
5 6 7
6
FHL1
FHL2
FHL3
thermostat installation
24).
(1)

Application 2

Space heating only application without room thermostat connected to
the indoor unit. The temperature in each room is controlled by a valve
on each water circuit. Domestic hot water is provided through the
domestic hot water tank which is connected to the indoor unit.
1 2 3 4 5 6
6
1 Outdoor unit
2 Indoor unit
3 Heat exchanger
4 Backup heater
5 Pump
6 Shut-off valve
7 Motorised 3-way valve (delivered with domestic hot water
tank)
8 Collector (field supply)
9 By-pass valve (field supply)
10 Domestic hot water tank (optional)
11 Booster heater
12 Heat exchanger coil
FHL1...3 Floor heating loop
T1...3 Individual room thermostat (optional)
M1...3 Individual motorised valve to control the floor heating loop
(field supply)
Pump operation
With no thermostat connected to the indoor unit (2), the pump (5) can
be configured to operate either as long as the indoor unit is on, or
until the required water temperature is reached.
INFORMATION
Details on pump configuration can be found under
"8.3. Pump operation configuration" on page
Space heating
The outdoor unit (1) will operate to achieve the target leaving water
temperature as set on the user interface.
NOTICE
When circulation in each space heating loop (FHL1...3) is
controlled by remotely controlled valves (M1...3), it is
important to provide a by-pass valve (9) to avoid the flow
switch safety device from being activated.
The by-pass valve should be selected as such that at all
time the minimum water flow as mentioned under
"6.7. Water pipework" on page 15
It is recommended to select a pressure difference
controlled by-pass valve.
(1) When the unit is configured for restricted power supply condition mode,
see "Appendix" on page 51.
(2) For tank without electrical booster heater (EKHTS), the backup heater will
be used in domestic water heating mode.
(3) Only applicable for tank with built-in electrical booster heater (EKHW*).
7 8
T1 T2 T3
M
M1 M2 M3
FHL1
11 12
FHL2
10
(2)
(3)
24.
is guaranteed.
EKHBH/X008BB
Indoor unit for air to water heat pump system
4PW62570-1A – 01.2011
9
FHL3