Setting Up An Auxiliary Heat Source For Space Heating - Daikin ERHQ011BA Installer's Reference Manual

Configuration
Setting
Unit temperature control:
#: [A.2.1.7]
Code: [C-07]
Number of water temperature
zones:
#: [A.2.1.8]
Code: [7-02]
In case of heat pump convectors:
External room thermostat for the
additional zone:
#: [A.2.2.5]
Code: [C-06]
Shut-off valve output
Shut-off valve
At the mixing valve station
Benefits
Comfort.
The smart room thermostat functionality can decrease or
increase the desired leaving water temperature based on
the actual room temperature (modulation).
The combination of the two heat emitter systems provides
the excellent heating comfort of the under floor heating, and
the excellent cooling comfort of the heat pump convectors.
Efficiency.
Depending on the demand, the indoor unit supplies
different leaving water temperature matching the design
temperature of the different heat emitters.
Under floor heating has the best performance with
Altherma LT.
5.3 Setting up an auxiliary heat source for space
heating
Space heating can be done by:
The indoor unit
An auxiliary boiler (field supply) connected to the system
When the room thermostat requests heating, the indoor unit or
the auxiliary boiler starts operating depending on the outdoor
temperature (status of the changeover to external heat source).
When the permission is given to the auxiliary boiler, the space
heating by the indoor unit is turned OFF.
Bivalent operation is only possible for space heating, NOT for
domestic hot water production. Domestic hot water is always
produced by the DHW tank connected to the indoor unit.
EHBH/X16
Daikin Altherma - Low Temperature Split
4P313776-1 – 2012.05
Value
2 (RT control): Unit operation is
decided based on the ambient
temperature of the user interface.
Note:
Main room = user interface
used as room thermostat
functionality
Other rooms = external
room thermostat
functionality
1 (2 LWT zones): Main +
additional
1 (Thermo ON/OFF): When the
used external room thermostat or
heat pump convector can only
send a thermo ON/OFF
condition. No separation
between heating or cooling
demand.
Set to follow the thermo demand
of the main zone.
If the main zone must be shut off
during cooling mode to prevent
condensation on the floor, set it
accordingly.
Set the desired main leaving
water temperature for heating
and/or cooling.
5 Application guidelines
INFORMATION
During heating operation of the heat pump, the
heat pump operates
temperature set via the user interface. When weather-
dependent operation is active, the water temperature
is determined automatically depending on the outdoor
temperature.
During heating operation of the auxiliary boiler, the
auxiliary boiler operates to achieve the desired water
temperature set via the auxiliary boiler controller.
Setup
Integrate the auxiliary boiler as follows:
a b c d e
f
a Outdoor unit
b Indoor unit
c Heat exchanger
d Backup heater
e Pump
f Shut-off valve
g Motorised 3-way valve (delivered with DHW tank)(field
supply)
h Non-return valve
i Shut-off valve
j Collector (field supply)
k Auxiliary boiler (field supply)
l Aquastat valve (field supply)
m DHW tank (option)
n Heat exchanger coil
FHL1...3 Under floor heating
NOTICE
Make sure the auxiliary boiler and its integration in the
system complies with applicable legislation.
Daikin is NOT responsible for incorrect or unsafe
situations in the auxiliary boiler system.
Make sure the return water to the heat pump does NOT exceed
55°C. To do so:
Set the desired water temperature via the auxiliary boiler
controller to maximum 55°C.
Install an aquastat valve in the return water flow of the
heat pump.
Set the aquastat valve to close above 55°C and to open
below 55°C.
Install non-return valves.
Make sure to only have one expansion vessel in the water
circuit. An expansion vessel is already is already premounted in
the indoor unit.
to achieve the desired
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Installer reference guide
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