only.
1
2
1
9
3
4
T
2
3
5
I
4
5
6
7
8
I
7
T
YPICAL
APPLICATION EXAMPLES
Application 2
The application examples given below are for illustration purposes
Space heating only application without room thermostat connected to
the unit. The temperature in each room is controlled by a valve on
each water circuit. Domestic hot water is provided through the
Application 1
domestic hot water tank which is connected to the unit.
Space heating only application with a room thermostat connected to
the unit.
I
1
2
3
4
6
5
7
I
T
M
T1
T2
T3
1
2
3
4
5
8
M1
9
FHL1
M2
FHL2
M3
FHL3
FHL1
FHL2
FHL3
10
Unit
FHL1..3
Floor heating loop
Heat exchanger
(field supply)
Unit
Heat exchanger coil
Pump
Shut-off valve
Room thermostat
(optional)
Heat exchanger
Pump
10
Domestic hot water tank
(optional)
Collector (field supply)
User interface
Shut-off valve
FHL1..3
Floor heating loop
Unit operation and space heating
Collector (field supply)
(field supply)
When a room thermostat (T) is connected to the unit and when there
Motorised 3-way valve
(optional)
T1..3
Individual room
thermostat (field supply)
is a heating request from the room thermostat, the unit will start
operating to achieve the target leaving water temperature as set on
By-pass valve
(field supply)
M1..3
Individual motorised
valve to control loop
the user interface.
Booster heater
FHL1 (field supply)
When the room temperature is above the thermostat set point, the
User interface
unit will stop operating.
Pump operation
Make sure to connect the thermostat wires to the correct
With no thermostat connected to the unit (1), the pump (3) can be
terminals (see "Connection of the thermostat cable" on
configured to operate either as long as the unit is on, or until the
page 20) and to configure the DIP switch toggle switches
required water temperature is reached.
correctly (see "Room thermostat installation configuration"
on page 23).
NOTE
Details on pump configuration can be found under
"Pump operation configuration" on page 23.
Space heating
The 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) is
controlled by remotely controlled valves (M1..3), it is
important to provide a by-
pass valve (7) 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 13 is guaranteed.
EDLQ036~054B EBLQ036~054BA6VJU1
Installation manual
Unit for air to water heat pump system
4PW56182-1