E(D/B)(H/L)Q011~016BB
Unit for air to water heat pump system
4PW67904-1 – 01.2011
Installation manual
6
Application 3
Space heating and cooling application with the room thermostat set
for heating/cooling connected to the 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 unit.
1 Unit
2 Heat exchanger
3 Backup heater
(1)
4 Pump
5 Shut-off valve
6 Collector (field supply)
7 Motorised 3-way valve (delivered with the domestic hot
water tank)
8 Booster heater
(2)
9 Heat exchanger coil
10 Domestic hot water tank
11 Motorised 2-way valve (field supply)
FCU1...3 Fan coil unit (field supply)
FHL1...3 Floor heating loop (field supply)
T Room thermostat with heating/cooling switch (optional)
UI User interface
Pump operation and space heating and cooling
According to the season, the customer will select heating or cooling
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 unit (
1
) will switch to
"heating mode"/"cooling mode". The unit (
1
) will start operating to
achieve the target leaving hot/cold water temperature.
In case of cooling mode, the 2-way valve (
11
) 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.
Domestic water heating
Domestic water heating is as described under
"Application 2" on
page 5
.
Application 4
Space heating and cooling application without the room thermostat
connected to the 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 Unit
2 Heat exchanger
3 Backup heater
4 Pump
5 Shut-off valve
6 Collector (field supply)
7 By-pass valve (field supply)
8 Motorised 2-way valve to shut off the floor heating loops
during cooling operation (field supply)
9 Motorised 2-way valve for activation of the room thermostat
(field supply)
FCU1...3 Fan coil unit with thermostat (field supply)
FHL1...3 Floor heating loop (field supply)
T Heating only room thermostat (optional)
T4...6 Individual room thermostat for fan coil heated/cooled room
(optional)
UI User interface
Pump operation
With no thermostat connected to the unit (
1
), the pump (
4
) can be
configured to operate either as long as the unit is on, or until the
required water temperature is reached.
Space heating and cooling
According to the season, the customer will select cooling or heating
through the user interface.
The unit (
1
) will operate in cooling mode or heating mode to achieve
the target leaving water temperature.
With the unit in heating mode, the 2-way valve (
8
) is open. Hot water
is provided to both the fan coil units and the floor heating loops.
With the unit in cooling mode, the motorised 2-way valve (
8
) is closed
to prevent cold water running through the floor heating loops (FHL).
(1) For tank without electrical booster heater (EKHTS), the backup heater will
be used in domestic water heating mode.
(2) Only applicable for tank with built-in electrical booster heater (EKHW*).
NOTICE
■
Make sure to connect the thermostat wires to the
correct terminals (see
"Connection of the thermostat
cable" on page 25
) and to configure the DIP switch
toggle switches correctly (see
"10.2. Room
thermostat installation configuration" on page 29
).
■
Wiring of the 2-way valve (
11
) 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.
FHL1
FHL2
FHL3
5
4
2
3
1
M
10
7
11
9
8
M
FCU1
FCU2
FCU3
6
T
UI
INFORMATION
Details on pump configuration can be found under
"10.3. Pump operation configuration" on page 29
.
FHL1
FHL2
FHL3
T
7
T4
T5
T6
5
4
2
3
1
9
M
8
M
FCU1
FCU2
FCU3
6
6
UI
