Application 3; Application 4 - Daikin Altherna Serie Manual De Instalación

Domestic water heating
When domestic water heating mode is enabled (either manually by
the user, or automatically through a schedule timer) the target
domestic hot water temperature will be achieved by a combination of
the heat exchanger coil and the electrical booster heater.
When the domestic hot water temperature is below the user
configured set point, the 3-way valve will be activated to heat the
domestic water by means of the heat pump. In case of large domestic
hot water demand or a high domestic hot water temperature setting,
the booster heater (8) can provide auxiliary heating.
It is possible to connect either a 2-wire or a 3-wire 3-way
valve (6). Make sure to fit the 3-way valve correctly. For
more details, refer to "Wiring the 3-way valve" on page 16.
NOTE The unit can be configured so that at low outdoor
temperatures the domestic 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 domestic hot water tank configuration for
low outdoor temperatures can be found under "Field
settings" on page 20, field settings [5-02] to [5-04].

Application 3

Space cooling and heating application with a room thermostat
suitable for cooling/heating changeover 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.
I
T
1 2 3 4
M
1 Unit
2 Heat exchanger
3 Pump
4 Shut-off valve
5 Collector (field supply)
6 Motorised 3-way valve
8 Booster heater
9 Heat exchanger coil
Installation manual
7
5
6 11
FCU1
FCU2
FCU3
M
8 9
FHL1
FHL2
FHL3
10
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
cooling/heating switch
(field supply)
I User interface
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 unit (1) will switch to
"cooling mode"/"heating mode". The unit (1) will start operating to
achieve the target leaving cold/hot water temperature.
In case of cooling mode, the motorised 2-way valve (11) will close as
to prevent cold water running through the floor heating loops (FHL).
Make sure to connect the thermostat wires to the correct
terminals (see "Connection of the thermostat cable" on
page 16) and to configure the DIP switch toggle switches
correctly (see "Room thermostat installation configuration"
on page 18).
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.
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 6.

Application 4

Space cooling and heating application without a room thermostat
connected to the 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.
I
1 2 3 4
1 Unit
2 Heat exchanger
3 Pump
4 Shut-off valve
5 Collector (field supply)
7 By-pass valve (field
supply)
11 Motorised 2-way valve
to shut off the floor
heating loops during
cooling operation (field
supply)
5
T4 T5 T6
11 12
FCU1
T
FCU2
5
FCU3
M M
FHL1
FHL2
FHL3
12 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 (field supply)
T4..6 Individual room
thermostat for fan coil
heated/cooled room (field
supply)
I User interface
E(D/B)(H/L)Q011~016AA6V3+W1
Unit for air to water heat pump system
4PW51121-1A
7