EKHBH/ EKSWW150-300V3/Z2
Indoor unit for air to water heat pump and sanitary warm water tank for air to water heat pump system
4PW36978-1C
Installation manual
4
Sanitary heating
When sanitary heating mode is enabled (either manually by the user,
or automatically through a schedule timer) the target sanitary water
temperature will be achieved by a combination of the heat exchanger
coil and the electrical booster heater.
When the sanitary water temperature is below the user configured
set point, the 3-way valve will be activated to heat the sanitary water
by means of the heat pump. In case of large sanitary water demand
or a high sanitary water temperature setting, the booster heater (10)
can provide auxiliary heating.
Application 3
Space cooling and heating application with a room thermostat
suitable for cooling/heating changeover connected to the indoor
unit. Heating is provided through floor heating loops and fan coil
units. Cooling is provided through the fan coil units only.
Sanitary warm water is provided through the sanitary water tank
which is connected to the indoor unit.
Pump operation and space heating and cooling
According to the season, the customer will select cooling or heating
on the room thermostat (T). This selection is not possible by
operating the user interface.
When space cooling/heating is requested by the room thermostat
(T), the pump will start operating and the indoor unit (2) will switch to
"cooling mode"/"heating mode". The outdoor unit (1) will start
operating to achieve the target leaving cold/hot water temperature.
In case of cooling mode, the motorised 2-way valve (13) 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 on the
indoor unit.
Sanitary heating
Sanitary water heating is as described under
Application 4
Space cooling and heating application without a room thermostat
connected to the indoor unit, but with a heating only room
thermostat controlling the floor heating and a cooling/heating
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.
It is possible to connect either a 2-wire or a 3-wire 3-way
valve (8). Make sure to fit the 3-way valve correctly. For
more details, refer to
"Wiring the 3-way valve" on page 13
NOTE
The indoor unit can be configured so that at low
outdoor temperatures the sanitary water is exclusively
heated by the booster heater. This assures that the full
capacity of the heat pump is available for space
heating.
Details on sanitary water tank configuration for low
outdoor temperatures can be found under
, field settings [5-02] to [5-04].
1
Outdoor unit
10
Booster heater
2
Indoor unit
11
Heat exchanger coil
3
Heat exchanger
12
Sanitary water tank
4
Pump
13
Motorised 2-way valve
(field supply)
5
Shut-off valve
6
Collector (field supply)
FCU1..3
Fan coil unit (field supply)
7
Shut-off valve
FHL1..3
Floor heating loop
(field supply)
8
Motorised 3-way valve
(field supply)
T
Room thermostat with
cooling/heating switch
(field supply)
M
M
FHL1
T
FHL2
FHL3
FCU1
FCU2
FCU3
5
4
3
2
1
6
12
7
8
13
11
12
10
Make sure to connect the thermostat wires to the correct
terminals (see
"Connection of the thermostat cable" on
) and to configure the DIP switch toggle switches
correctly (see
"Room thermostat installation configuration"
Wiring of the 2-way valve (13) 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.
M
FCU1
FCU2
FCU3
T4
T5
T6
FHL1
FHL2
FHL3
T
5
4
3
2
1
6
7
13
M
14
6
9