5 Application guidelines
Installer reference guide
11
ERLQ004~008CA + 08S18CB
Daikin Altherma – Low temperature split
4P401676-1D – 2018.07
5
Application guidelines
5.1
Overview: Application guidelines
The purpose of the application guidelines is to give a glance of the
possibilities of the Daikin heat pump system.
NOTICE
▪ The illustrations in the application guidelines are meant
for reference only, and are NOT to be used as detailed
hydraulic
diagrams.
The
detailed
hydraulic
dimensioning and balancing are NOT shown, and are
the responsibility of the installer.
▪ For more information about the configuration settings to
optimize heat pump operation, see
"8 Configuration" on
page 39
.
This chapter contains application guidelines for:
▪ Setting up the space heating system
▪ Setting up the domestic hot water tank
▪ Setting up the energy metering
▪ Setting up the power consumption control
▪ Setting up an external temperature sensor
5.2
Setting up the space heating
system
The Daikin heat pump system supplies leaving water to heat
emitters in one or more rooms.
Because the system offers a wide flexibility to control the
temperature in each room, you need to answer the following
questions first:
▪ How many rooms are heated by the Daikin heat pump system?
▪ Which heat emitter types are used in each room and what is their
design leaving water temperature?
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 the leaving
water temperature control on the unit's user interface 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 auto emergency [A.6.C] to 1.
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
Room (zone)
Heat emitters: Design
temperature
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
a
b c
g
h
f
d
e
i
i
h
h
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 (field supply)
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.
▪ 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/1a and
X2M/4). The indoor unit will only supply the desired additional
leaving water temperature when there is an actual demand.
Configuration
Setting
Value
Unit temperature control:
▪ #: [A.2.1.7]
▪ Code: [C-07]
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
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