Daikin Altherma EPGA16DAV3, Руководство по установке для специалистов

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5 Application guidelines
Installer reference guide
11
EPGA11~ EA9W
Daikin Altherma – Low temperature split
4P556075-1 – 2019.02
NOTICE
If you install this unit as a single-zone application, then:
Setup. Install a bypass between the space heating water
inlet and outlet of the additional zone (=direct zone). Do
NOT interrupt the water flow by closing the shut-off valves.
a
a Bypass
Configuration. Set field setting [7-02]=0 (Number of zones
= Single zone).
5.2.1 Multiple rooms – Two LWT zones
This unit is designed to deliver water at 2 different temperatures. A
typical installation consists of underfloor heating at a lower
temperature and radiators at a higher water temperature.
In this document:
▪ Main zone = Zone with the lowest design temperature
▪ Additional zone = Zone with the highest design temperature
Typical example:
Room (zone) Heat emitters: Design
temperature
Living room (main zone) Under floor heating: 35°C
Bed rooms (additional zone) Heat pump convectors: 45°C
Setup
j
k
j
HPC1
FHL1 FHL2 FHL3
HPC2 HPC3
B
A
C
E
D
M
b
g h f
d e
i
i
h h
h
a c
h
A Additional leaving water temperature zone
B Room 1
C Room 2
D Main leaving water temperature zone
E Room 3
a Outdoor unit
b Indoor unit
c Heat exchanger
d Backup heater
e Motorised 3-way valve (mixing the main zone)
f Additional pump
g Main pump
h Shut-off valve
i Collector (field supply)
j Remote controller of the heat pump convectors (field
supply)
k User interface used as room thermostat
HPC1...3 Heat pump convectors (field supply)
FHL1...3 Floor heating loops (field supply)
▪ For the main zone: the room temperature is controlled by the user
interface, which is used as room thermostat (optional equipment
EKRUDAS).
▪ For the additional zone:
▪ The external thermostat is directly connected to the indoor unit.
▪ The desired room temperature is set via the external thermostat
and the thermostatic valves of the radiators in each room.
▪ The heating demand signal from the external thermostat is
connected to the digital input on the indoor unit (X2M/35a and
X2M/30). The indoor unit will only supply the desired additional
leaving water temperature when there is an actual demand.
Configuration
Setting Value
Unit temperature control:
▪ #: [2.9]
▪ Code: [C-07]
2 (Room thermostat): 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
Number of water temperature
zones:
▪ #: [4.4]
▪ Code: [7-02]
1 (Dual zone): Main + additional
In case of heat pump convectors:
External room thermostat for the
additional zone:
▪ #: [3.A]
▪ Code: [C-06]
1 (1 contact): When the used
external room thermostat or
heat pump convector can only
send a thermo ON/OFF
condition.
Shut-off valve output Set to follow the thermo demand
of the main zone.
Benefits
▪ Comfort. The smart room thermostat functionality can decrease
or increase the desired leaving water temperature based on the
actual room temperature (modulation).
▪ 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.