Installation manual
4
EKHBH/XE008AA3V3
Indoor unit for air to water heat pump system
4PW48441-1B
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.
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.
Space heating
The outdoor unit (1) will operate to achieve the target leaving water
temperature as set on the user interface.
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 water
by means of the heat pump. In case of a high domestic hot water
temperature setting, the booster heater (10) provides heating.
Application 3
Space cooling and heating application with a
room thermostat
suitable for cooling/heating changeover
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.
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 cooling/heating is requested by the room thermostat
(T), the pump will start operating and the indoor unit (2) will switch to
"cooling mode"/"heating mode". The outdoor unit (1) will start
operating to achieve the target leaving cold/hot water temperature.
In case of cooling mode, the motorised 2-way valve (13) will close as
to prevent cold water running through the floor heating loops (FHL).
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.
1
Outdoor unit
10
Booster heater
2
Indoor unit
11
Heat exchanger coil
3
Heat exchanger
12
Domestic hot water tank
4
Pump
FHL1..3
Floor heating loop
(field supply)
5
Shut-off valve
6
Collector (field supply)
T1..3
Individual room
thermostat (field supply)
7
Shut-off valve
8
Motorised 3-way valve
(field supply)
M1..3
Individual motorised
valve to control loop
FHL1 (field supply)
9
By-pass valve
(field supply)
NOTE
Details on pump configuration can be found under
"Pump operation configuration" on page 15
.
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
is guaranteed.
It is possible to connect either a 2-wire or a 3-wire 3-way
valve (8). Make sure to fit the 3-way valve correctly. For
more details, refer to
"Wiring the 3-way valve" on page 14
M
FHL1
FHL2
FHL3
M1
T1
M2
T2
M3
T3
5
4
3
2
1
11
12
10
7
8
6
9
1
Outdoor unit
10
Booster heater
2
Indoor unit
11
Heat exchanger coil
3
Heat exchanger
12
Domestic hot water tank
4
Pump
13
Motorised 2-way valve
(field supply)
5
Shut-off valve
6
Collector (field supply)
FCU1..3
Fan coil unit (field supply)
7
Shut-off valve
FHL1..3
Floor heating loop
(field supply)
8
Motorised 3-way valve
(field supply)
T
Room thermostat with
cooling/heating switch
(field supply)
Make sure to connect the thermostat wires to the correct
terminals (see
"Connection of the thermostat cable" on
) and to configure the DIP switch toggle switches
correctly (see
"Room thermostat installation configuration"
).
Wiring of the 2-way valve (13) is different for a NC (normal
closed) valve and a NO (normal open) valve! Make sure to
connect to the correct terminal numbers as detailed on the
wiring diagram.
M
M
FHL1
T
FHL2
FHL3
FCU1
FCU2
FCU3
5
4
3
2
1
6
12
7
8
13
11
12
10
Summary of Contents for EKHBHE008AA3V3
Page 29: ...NOTES NOTES ...
Page 30: ...4PW48441 1B Copyright Daikin ...
