Table of Contents
T
APPLICATION EXAMPLES
YPICAL
The application examples given below are for illustration purposes
only.
Application 1
Space heating only application with a room thermostat connected to
the unit.
I
T
1
2
3
4
Unit
1
Heat exchanger
2
Pump
3
Shut-off valve
4
Collector (field supply)
5
Unit operation and space heating
When a room thermostat (T) is connected to the unit and when there
is a heating request from the room thermostat, the unit will start
operating to achieve the target leaving water temperature as set on
the user interface.
When the room temperature is above the thermostat set point, the
unit will stop operating.
Make sure to connect the thermostat wires to the correct
terminals (see "Connection of the thermostat cable" on
page 20) and to configure the DIP switch toggle switches
correctly (see "Room thermostat installation configuration"
on page 23).
EDLQ036~054BA6VJU1 + EBLQ036~054BA6VJU1
Unit for air to water heat pump system
4PW56182-1
5
FHL1
FHL2
FHL3
FHL1..3
Floor heating loop
(field supply)
Room thermostat
T
(optional)
User interface
I
Application 2
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
domestic hot water tank which is connected to the unit.
I
1
2
3
4
M
Unit
1
Heat exchanger
2
Pump
3
Shut-off valve
4
Collector (field supply)
5
Motorised 3-way valve
6
(optional)
By-pass valve
7
(field supply)
Booster heater
8
Pump operation
With no thermostat connected to the unit (1), the pump (3) can be
configured to operate either as long as the unit is on, or until the
required water temperature is reached.
Details on pump configuration can be found under
NOTE
"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.
5
6
T1
T2
T3
M1
M2
M3
8
FHL1
9
FHL2
FHL3
10
Heat exchanger coil
9
10
Domestic hot water tank
(optional)
FHL1..3
Floor heating loop
(field supply)
T1..3
Individual room
thermostat (field supply)
M1..3
Individual motorised
valve to control loop
FHL1 (field supply)
User interface
I
Installation manual
7
7
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