Multiple Rooms - Two Lwt Zones - Daikin ERGA08DAV3 Installer's Reference Manual

Once the space heating requirements are clear, Daikin recommends
to follow the setup guidelines below.
NOTICE
If an external room thermostat is used, the external room
thermostat will control the room frost protection. However,
the room frost protection is only possible if [C.2] Space
heating/cooling is turned ON.
INFORMATION
In case an external room thermostat is used and room frost
protection needs to be guaranteed in all conditions, then
you have to set Emergency [9.5] to Automatic.
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 Bypass
Configuration. Set field setting [7-02]=0 (Number
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)
Living room (main zone)
Bed rooms (additional zone)
ERGA04~08DAV3(A) + EHVZ04+08S18+23DA +
EHVZ04+08S18+23DJ
Daikin Altherma 3 R F
4P495249-1B – 2019.06
a
of
Heat emitters: Design
temperature
Underfloor heating: 35°C
Heat pump convectors: 45°C
5 Application guidelines
Setup
a b c d e h h
M
f g 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
Unit temperature control:
▪ #: [2.9]
▪ Code: [C-07]
Number of water temperature
zones:
▪ #: [4.4]
▪ Code: [7-02]
i
A
C
B
HPC1 HPC2 HPC3
j j
i
D
E
h
FHL1 FHL2 FHL3
k
Value
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
1 (Dual zone): Main + additional
Installer reference guide
11