NOTE
■
■
■
■
■
■
FCU1
1
7
2
3
4
T2
5
6
3
Door 1
Door 2
Door 3
Application 6
When the room temperature of both zones is above the thermostat
set point, the outdoor unit and pump will stop operating.
Space heating with room thermostat application through floor heating
loops and fan coil units. The floor heating loops and fan coil units
require different operating water temperatures.
Make sure to connect the thermostat wires to the
correct terminals (see "Overview of the unit" on
page 11).
The floor heating loops require a lower water temperature in heating
Make sure to configure the field settings [7-02],
mode compared to fan coil units. To achive these two set points, a
[7-03] and [7-04] correctly. Refer to "Dual set point
mixing station is used to adapt the water temperature according to
control" on page 30.
requirements of the floor heating loops. The fan coil units are directly
connected to the unit water circuit and the floor heating loops after
the mixing station. The control of this mixing station is not done by the
unit.
Make sure to configure the DIP switch SS2-3 on
the PCB of the E(D/B) switch box correctly. Refer
to "Room thermostat installation configuration" on
page 23.
The operation and configuration of the field water circuit is the
responsibility of the installer.
NOTE
The request signals for space heating can be
Daikin only offers a dual set point control function. By this function
two set points can be generated. Depending on the required water
implemented in two different ways (installer
choice).
temperature (floor heating loops and/or fan coil units are required)
- Thermo ON/OFF signal from room thermostat
first set point or second set point can be activated.
- Status signal (active/not active) from the
mixing station
It is the installers responsibility to make sure no
unwanted situations can occur (e.g. too high
T1
T2
B
6
■
water temperatures towards floor heating loops,
etc.)
Daikin does not offer any type of mixing station.
Dual set point control only provides the possibility
to use two set points.
When only zone A request heating, zone B will be
fed with water at a temperature equal to the first
FCU2
set point.
1
2
3
4
FCU3
This can lead to unwanted heating of zone B.
A
5
■
When only zone B request heating, the mixing
station will be fed with water at a temperature
equal to the second set point.
Depending on the control of the mixing station,
the floor heating loop can still receive water at a
temperature equal to set point of the mixing
station.
FHL1
7
FHL2
FHL3
Be aware that the actual water temperature through the
floor heating loops depends on the control and setting of
Outdoor unit
Mixing station (field supply)
the mixing station.
Heat exchanger
T1
Room thermostat for zone
Pump
Shut-off valve
A (optional)
Room thermostat for zone
O
VERVIEW
OF THE UNIT
Collector zone A
B (optional)
(field supply)
FCU1..3
Fan coil unit (optional)
Opening the unit
Collector zone B
FHL1...3
Floor heating loop
(field supply)
(field supply)
The advantage of the dual set point control is that the heat
pump will/can operate at the lowest required leaving water
temperature when only floor heating is required. Higher
leaving water temperatures are only required in case fan
coil units are operating.
This results in a better performance of the heat pump.
1
2
Pump operation and space heating
When the room thermostat for the floor heating loop (T1) and the fan
coil units (T2) are connected to the indoor unit, the pump (4) will
gives access to the compressor compartment and electrical parts
operate when there is a request for heating from T1 and/or T2. The
outdoor unit will start operating to achieve the target leaving water
gives access to the electrical parts of the hydraulic compartment
temperature. The target leaving water temperature depends on which
gives access to the hydraulic compartment
room thermostat is requesting heating.
Set point
Field setting
Thermo status
Switch off all power supply
— i.e. unit power supply and
backup heater and domestic hot water tank power supply
Zone A
First
UI
ON
OFF
ON
OFF
(if applicable)
— before removing doors 1 and 2.
Zone B
Second
[7-03]
OFF
ON
ON
OFF
Resulting water temperature
UI
[7-03]
[7-03]
—
Parts inside the unit can be hot.
Result pump operation
ON
ON
ON
OFF
EDLQ036~054B EBLQ036~054BA6VJU1
Installation manual
Unit for air to water heat pump system
4PW56182-1
11
