Application 6 - Daikin Altherma EDHQ011BB6V3 Installation Manual

Application 6

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.
The floor heating loops require a lower water temperature in heating
mode compared to fan coil units. To achieve these two set points, a
mixing station is used to adapt the water temperature according to
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.
The operation and configuration of the field water circuit is the
responsibility of the installer.
Daikin only offers a dual set point control function. By this function
two set points can be generated. Depending on the required water
temperature (floor heating loops and/or fan coil units are required)
first set point or second set point can be activated.
1 2 3 4 5
1 Unit
2 Heat exchanger
3 Backup heater
4 Pump
5 Shut-off valve
6 Collector zone A (field supply)
7 Collector zone B (field supply)
8 Mixing station (field supply)
T1 Room thermostat for zone A (optional)
T2 Room thermostat for zone B (optional)
FCU1...3 Fan coil unit (optional)
FHL1...3 Floor heating loop (field supply)
INFORMATION
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.
The hydraulic balance is very important. (unit - mixing
station - FCU1...3)
Installation manual
9
T1
B
7
T2
FCU1
FCU2
FCU3
A
6
FHL1
8
FHL2
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 unit, the pump (4) will operate
when there is a request for heating from T1 and/or T2. The unit will
start operating to achieve the target leaving water temperature. The
target leaving water temperature depends on which room thermostat
is requesting heating.
Set point
Zone A First
Zone B Second
Resulting water temperature
Result pump operation
When the room temperature of both zones is above the thermostat
set point, the unit and pump will stop operating.
NOTICE
Make sure to connect the thermostat wires to the
correct terminals (see
page
Make sure to configure the field settings [7-02], [7-03]
and [7-04] correctly. Refer to
on page
Make sure to configure the DIP switch SS2-3 on the
PCB of the switch box correctly. Refer to
thermostat installation configuration" on page
It is the installers responsibility to make sure no
unwanted situations can occur (e.g. too high water
temperatures towards floor heating loops, etc.)
Be aware that the actual water temperature through
the floor heating loops depends on the control and
setting of the mixing station.
INFORMATION
The request signals for space heating can be
implemented in two different ways (installer choice).
-
-
FHL3
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 set point.
This can lead to unwanted heating of zone B.
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.
At this type of application heating/cooling selection
always has to be done on the user interface. Refer to
"Dual set point control" on page 39
Field setting Thermo status
UI ON OFF
[7-03] OFF ON
UI [7-03]
ON ON
"5. Overview of the unit" on
10).
"Dual set point control"
39.
Thermo ON/OFF signal from room thermostat
Status signal (active/not active) from the mixing
station
Unit for air to water heat pump system
ON OFF
ON OFF
[7-03] —
ON OFF
"10.2. Room
29.
for more details.
E(D/B)(H/L)Q011~016BB
4PW67904-1 – 01.2011