page 7.
5
I
1
1
5
2
3
4
2
3
4
6
T
5
7
8
9
I
I
8
Domestic water heating
Pump operation and space heating and cooling
When domestic water heating mode is enabled (either manually by
According to the season, the customer will select cooling or heating
the user, or automatically through a schedule timer) the target
on the room thermostat (T). This selection is not possible by
domestic hot water temperature will be achieved by a combination of
operating the user interface.
the heat exchanger coil and the electrical booster heater.
When space heating/cooling is requested by the room thermostat
When the domestic hot water temperature is below the user
(T), the pump will start operating and the unit (1) will switch to
configured set point, the 3-way valve will be activated to heat the
"heating mode"/"cooling mode". The unit (1) will start operating to
domestic water by means of the heat pump. In case of large domestic
achieve the target leaving cold/hot water temperature.
hot water demand or a high domestic hot water temperature setting,
In case of cooling mode, the motorised 2-way valve (11) will close as
the booster heater (8) can provide auxiliary heating.
to prevent cold water running through the floor heating loops (FHL).
It is possible to connect either a 2-wire or a 3-wire 3-way
Make sure to connect the thermostat wires to the correct
valve (6). M
ake sure to fit the 3-way valve correctly. For
terminals (see "Connection of the thermostat cable" on
more details, refer to "Wiring the 3-way valve" on page 20.
page 20) and to configure the DIP switch toggle switches
correctly (see "Room thermostat installation configuration"
NOTE
The unit can be configured so that at low outdoor
on page 23).
temperatures the domestic water is exclusively heated
by the booster heater. This assures that the full
Wiring of the 2-way valve (11) is different for a NC (normal
capacity of the heat pump is available for space
closed) valve and a NO (normal open) valve! Make sure to
heating.
connect to the correct terminal numbers as detailed on the
Details on domestic hot water tank configuration for
wiring diagram.
low outdoor temperatures can be found under "Field
settings" on page 25, field settings [5-02] to [5-04].
The ON/OFF setting of the heating/cooling operation is done by the
room thermostat and cannot be done by the user interface.
Application 3
Domestic water heating
Domestic water heating is as described under "Application 2" on
Space cooling and heating application with a
room thermostat
suitable for heating/cooling changeover
connected to the unit.
Heating is provided through floor heating loops and fan coil units.
Cooling is provided through the fan coil units only.
Application 4
Domestic hot water is provided through the domestic hot water tank
which is connected to the unit.
Space cooling and heating application
without a room thermostat
connected to the unit,
but with a heating only room thermostat
controlling the floor heating and a heating/cooling thermostat
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.
I
T
5
7
1
2
3
4
6
11
FCU1
FCU2
M
M
FCU3
T4
T5
T6
1
2
3
4
11 12
8
9
FHL1
M
T
M
FCU1
5
FCU2
FCU3
FHL2
FHL3
10
FHL1
FHL2
FHL3
Unit
10
Domestic hot water tank
Unit
12
Motorised 2-way valve for
Heat exchanger
Pump
Shut-off valve
Collector (field supply)
11
FCU1..3
FHL1..3
Motorised 2-way valve
(field supply)
Fan coil unit (field supply)
Floor heating loop
Heat exchanger
Pump
Shut-off valve
FCU1..3
activation of the room
thermostat (field supply)
Fan coil unit with
thermostat (field supply)
Motorised 3-way valve
(optional)
(field supply)
Room thermostat with
Collector (field supply)
By-
pass valve (field
FHL1..3
Floor heating loop (field
supply)
Booster heater
Heat exchanger coil
heating/cooling switch
(optional)
User interface
11
supply)
Motorised 2-way valve
to shut off the floor
T
T4..6
Heating only room
thermostat (optional)
Individual room
heating loops during
cooling operation (field
supply)
thermostat for fan coil
heated/cooled room
(optional)
User interface
Installation manual
EDLQ036~054B EBLQ036~054BA6VJU1
Unit for air to water heat pump system
4PW56182-1
