Multiple Rooms - One Lwt Zone; Daikin Altherma - Low Temperature Split - Daikin ERLQ004CA Installer's Reference Manual

5 Application guidelines
Configuration
Setting
Unit temperature control:
#: [A.2.1.7]
Code: [C-07]
Number of water temperature
zones:
#: [A.2.1.8]
Code: [7-02]
External room thermostat for the
main zone:
#: [A.2.2.4]
Code: [C-05]
Benefits
Cooling. Heat pump convectors provide, besides heating
capacity, also excellent cooling capacity.
Efficiency. Under floor heating has the best performance with
Altherma LT.
Comfort. The combination of the two heat emitter types
provides:
The excellent heating comfort of the under floor heating
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
A
B
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.
Installer reference guide
11
Value
1 (Ext RT control): Unit operation
is decided by the external
thermostat.
0 (1 LWT zone): Main
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.
C
T
a
NOTICE
Mind situations where the main room can be heated by
another heating source. Example: Fireplaces.
Configuration
Setting
Unit temperature control:
#: [A.2.1.7]
Code: [C-07]
Number of water temperature
zones:
#: [A.2.1.8]
Code: [7-02]
Benefits
Cost effective.
Easy. Same installation as for one room, but with thermostatic
valves.
Under floor heating or radiators – Multiple external
room thermostats
Setup
A
B
M1
A Main leaving water temperature zone
B Room 1
C Room 2
a External room thermostat
b Bypass valve
For each room, a shut-off valve (field supplied) is installed to
avoid leaving water supply when there is no heating or cooling
demand.
A bypass valve must be installed to make water recirculation
possible when all shut-off 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 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
Setting
Unit temperature control:
#: [A.2.1.7]
Code: [C-07]
Number of water temperature
zones:
#: [A.2.1.8]
Code: [7-02]
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.
Value
2 (RT control): Unit operation is
decided based on the ambient
temperature of the user interface.
0 (1 LWT zone): Main
C
b
M2
a a
Value
0 (LWT control): Unit operation is
decided based on the leaving
water temperature.
0 (1 LWT zone): Main
EHBH04+08 + ERLQ004~008

Daikin Altherma - Low Temperature Split

4P313774-1 – 2012.05