Application 2; Application 3 - Daikin EKHBHE008BA3V3 Installation Manual

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
M
7
1 Outdoor unit
2 Indoor unit
3 Heat exchanger
4 Pump
5 Shut-off valve
6 Collector (field supply)
7 Shut-off valve
8 Motorised 3-way valve
(delivered with
domestic hot water
tank)
9 By-pass valve
(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
The outdoor unit (1) will operate to achieve the target leaving water
temperature as set on the user interface.
When circulation in each space heating loop (FHL1..3)
NOTE
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
"Water pipework" on page 14
It is recommended to select a pressure difference
controlled by-pass valve.
EKHBH/XE008BA
Indoor unit for air to water heat pump system
4PW56301-1A
8 6
T1 T2 T3
M1 M2 M3
11 12
FHL1
FHL2
FHL3
10
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 loop
FHL1 (field supply)
21.
is guaranteed.
Domestic water heating
When domestic water heating mode is enabled (either manually by
the user, or automatically through a schedule timer) the target
domestic hot water temperature will be achieved by the heat
exchanger coil or the electrical booster heater.
When the domestic hot water temperature is below the user
configured set point, the 3-way valve will be activated to heat the
domestic hot water by means of the heat pump. In case of a high
domestic hot water temperature setting, the booster heater (11)
provides heating.
9
NOTE The indoor unit can be configured so that at low
outdoor temperatures the domestic hot water is
exclusively heated by the booster heater. This assures
that the full capacity of the heat pump is available for
space heating.
Details on domestic hot water tank configuration for
low outdoor temperatures can be found under
settings" on page

Application 3

Space cooling and heating application with the room thermostat set
for heating/cooling connected to the indoor unit. Heating is provided
through floor heating loops and fan coil units. Cooling is provided
through the fan coil units only.
Domestic hot water is provided through the domestic hot water tank
which is connected to the indoor unit.
1 2 3
1 Outdoor unit
2 Indoor unit
3 Heat exchanger
4 Pump
5 Shut-off valve
6 Collector (field supply)
7 Shut-off valve
8 Motorised 3-way valve
(delivered with
domestic hot water
tank)
23, field settings [5-02] to [5-04].
T
FCU1
4 5 8 13
M M
11 12
FHL1
7
10
10 Domestic hot water tank
(optional)
11 Booster heater
12 Heat exchanger coil
13 Motorised 2-way valve
(field supply)
FCU1..3 Fan coil unit (optional)
FHL1..3 Floor heating loop
T Room thermostat with
heating/cooling switch
(optional
"Field
6
FCU2
FCU3
FHL2
FHL3
Installation manual
5