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5 Application guidelines
Installer reference guide
12
ERLQ004~008CA + 08S18CA3VF
Daikin Altherma low temperature split
4P3662261 – 2014.01
Benefits
▪
Efficiency
. Under floor heating has the best performance with
Altherma LT.
▪
Comfort
.
The combination of the two heat emitter types provides
excellent heating comfort of the under floor heating.
5.2.2
Multiple rooms – One LWT zone
If only one leaving water temperature zone is needed because the
design leaving water temperature of all heat emitters is the same,
you do NOT need a mixing valve station (cost effective).
Example:
If the heat pump system is used to heat up one floor
where all the rooms have the same heat emitters.
Under floor heating or radiators – Thermostatic
valves
If you are heating up rooms with under floor heating or radiators, a
very common way is to control the temperature of the main room by
using a thermostat (this can either be the user interface or an
external room thermostat), while the other rooms are controlled by
socalled thermostatic valves, which open or close depending on the
room temperature.
Setup
T
B
C
A
a
A
Main leaving water temperature zone
B
Room 1
C
Room 2
a
User interface
▪ The under floor heating of the main room is directly connected to
the indoor unit.
▪ The room temperature of the main room is controlled by the user
interface used as thermostat.
▪ A thermostatic valve is installed before the under floor heating in
each of the other rooms.
INFORMATION
Mind situations where the main room can be heated by
another heating source. Example: Fireplaces.
Configuration
Setting
Value
Unit temperature control:
▪ #: [A.2.1.7]
▪ Code: [C07]
2 (RT control): Unit operation is
decided based on the ambient
temperature of the user interface.
Number of water temperature
zones:
▪ #: [A.2.1.8]
▪ Code: [702]
0 (1 LWT zone): Main
Benefits
▪
Cost effective
.
▪
Easy
. Same installation as for one room, but with thermostatic
valves.
Under floor heating or radiators – Multiple external
room thermostats
Setup
M2
M1
B
C
A
a
a
b
A
Main leaving water temperature zone
B
Room 1
C
Room 2
a
External room thermostat
b
Bypass valve
▪ For each room, a shutoff valve (field supplied) is installed to avoid
leaving water supply when there is no heating demand.
▪ A bypass valve must be installed to make water recirculation
possible when all shutoff valves are closed.
▪ The user interface connected to the indoor unit decides the space
operation mode. Mind that the operation mode on each room
thermostat must be set to match the indoor unit.
▪ The room thermostats are connected to the shutoff valves, but do
NOT have to be connected to the indoor unit. The indoor unit will
supply leaving water all the time, with the possibility to program a
leaving water schedule.
Configuration
Setting
Value
Unit temperature control:
▪ #: [A.2.1.7]
▪ Code: [C07]
0 (LWT control): Unit operation is
decided based on the leaving
water temperature.
Number of water temperature
zones:
▪ #: [A.2.1.8]
▪ Code: [702]
0 (1 LWT zone): Main
Benefits
Compared with under floor heating or radiators for one room:
▪
Comfort
.
You can set the desired room temperature, including
schedules, for each room via the room thermostats.
Heat pump convectors
Setup
B
A
a
a
C
A
Main leaving water temperature zone
B
Room 1
C
Room 2
a
Remote controller of the heat pump convectors
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