0 EKCBX/H008BAV3
Unit for air to water heat pump system
4PW64602-1A – 09.2010
Installation manual
11
8.
T
YPICAL
APPLICATION
EXAMPLES
The application examples given below are for illustration purposes
only.
8.1.
Application 1
Space heating only application with a room thermostat connected to
the unit.
1
Outdoor unit
2
Heat exchanger
3
Pump
4
Shut-off valve
5
Heater kit
6
Collector (field supply)
FHL1...3
Floor heating loop (field supply)
C
Control box
T
Room thermostat
I
User interface
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.
8.2.
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.
1
Outdoor unit
2
Heat exchanger
3
Pump
4
Shut-off valve
5
Heater kit
6
Collector (field supply)
7
Motorized 3-way valve (optional)
8
By-pass valve (field supply)
9
Booster heater
10
Heat exchanger coil
11
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...3
(field supply)
C
Control box
I
User interface
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.
Space heating
The unit (1) will operate to achieve the target leaving water
temperature as set on the user interface.
CAUTION
Make sure to connect the thermostat wires to the correct
terminals (see "Connection of the thermostat cable" on
page 27) and to configure the DIP switch toggle switches
correctly (see "13.2.
Room thermostat installation
configuration" on page 28).
FHL1
FHL2
FHL3
T
I
C
6
4
3
2
5
1
Details on pump configuration can be found under
"13.3. Pump operation configuration" on page 29.
CAUTION
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
"10. Piping connection work" on page 18 is guaranteed.
It is recommended to select a pressure difference
controlled by-pass valve.
FHL1
FHL2
FHL3
6
8
M
M1
T1
M2
T2
M3
T3
7
10
9 11
I
C
4
3
2
5
1
4PW64602-1A.book Page 11 Thursday, September 23, 2010 10:40 AM
Summary of Contents for EBHQ006BAV3
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