Installer reference guide
11
08 + ERLQ004~008
Daikin Altherma - Low Temperature Split
4P313774-1 – 2012.05
5 Application guidelines
Configuration
Benefits
Q
Cooling
.
Heat pump convectors provide, besides heating
capacity, also excellent cooling capacity.
Q
Efficiency
. Under floor heating has the best performance with
Altherma LT.
Q
Comfort
.
The combination of the two heat emitter types
provides:
Q
The excellent heating comfort of the under floor heating
Q
The excellent cooling comfort of the heat pump convectors
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
so-called thermostatic valves, which open or close depending on the
room temperature.
Setup
Q
The under floor heating of the main room is directly connected to
the indoor unit.
Q
The room temperature of the main room is controlled by the user
interface used as thermostat.
Q
A thermostatic valve is installed before the under floor heating in
each of the other rooms.
Configuration
Benefits
Q
Cost effective
.
Q
Easy
. Same installation as for one room, but with thermostatic
valves.
Under floor heating or radiators – Multiple external
room thermostats
Setup
Q
For each room, a shut-off valve (field supplied) is installed to
avoid leaving water supply when there is no heating or cooling
demand.
Q
A bypass valve must be installed to make water recirculation
possible when all shut-off valves are closed.
Q
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.
Q
The room thermostats are connected to the shut-off 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
Benefits
Compared with under floor heating or radiators for one room:
Q
Comfort
.
You can set the desired room temperature, including
schedules, for each room via the room thermostats.
Setting
Value
Unit temperature control:
Q
#: [A.2.1.7]
Q
Code: [C-07]
1 (Ext RT control): Unit operation
is decided by the external
thermostat.
Number of water temperature
zones:
Q
#: [A.2.1.8]
Q
Code: [7-02]
0 (1 LWT zone): Main
External room thermostat for the
main
zone:
Q
#: [A.2.2.4]
Q
Code: [C-05]
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.
A
Main leaving water temperature zone
B
Room 1
C
Room 2
a
User interface
T
B
C
A
a
NOTICE
Mind situations where the main room can be heated by
another heating source. Example: Fireplaces.
Setting
Value
Unit temperature control:
Q
#: [A.2.1.7]
Q
Code: [C-07]
2 (RT control): Unit operation is
decided based on the ambient
temperature of the user interface.
Number of water temperature
zones:
Q
#: [A.2.1.8]
Q
Code: [7-02]
0 (1 LWT zone): Main
A
Main leaving water temperature zone
B
Room 1
C
Room 2
a
External room thermostat
b
Bypass valve
Setting
Value
Unit temperature control:
Q
#: [A.2.1.7]
Q
Code: [C-07]
0 (LWT control): Unit operation is
decided based on the leaving
water temperature.
Number of water temperature
zones:
Q
#: [A.2.1.8]
Q
Code: [7-02]
0 (1 LWT zone): Main
M2
M1
B
C
A
a
a
b
