Rotex HPSU Bi-Bloc Ultra Series Installer's Reference Manual page 13

Underfloor 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. To guarantee reliable
operation, provide a minimum water flow as described in table "To
check the water volume and flow rate" in
piping" [ 4 25].
▪ The user interface integrated in 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:
▪ #: [2.9]
▪ Code: [C-07]
Number of water temperature
zones:
▪ #: [4.4]
▪ Code: [7-02]
Benefits
Compared with underfloor 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 – Multiple rooms
Setup
A
B
A Main leaving water temperature zone
RRGA04~08DAV3 + RHBX04+08DA
ROTEX HPSU Bi-Bloc Ultra
4P495262-1B – 2019.10
C
b
M2
a a
"6.4 Preparing water
Value
0 (Leaving water): Unit
operation is decided based on
the leaving water temperature.
0 (Single zone): Main
C
a a
5 Application guidelines
B Room 1
C Room 2
a Remote controller of the heat pump convectors
▪ The desired room temperature is set via the remote controller of
the heat pump convectors.
▪ The user interface integrated in the indoor unit decides the space
operation mode.
▪ The heating or cooling demand signals of each heat pump
convector are connected in parallel to the digital input on the
indoor unit (X2M/35 and X2M/30). The indoor unit will only supply
leaving water temperature when there is an actual demand.
INFORMATION
To increase comfort and performance, we recommend to
install the valve kit option EKVKHPC on each heat pump
convector.
Configuration
Setting
Unit temperature control:
▪ #: [2.9]
▪ Code: [C-07]
Number of water temperature
zones:
▪ #: [4.4]
▪ Code: [7-02]
Benefits
Compared with heat pump convectors for one room:
▪ Comfort. You can set the desired room temperature, including
schedules, for each room via the remote controller of the
heat pump convectors.
Combination: Underfloor heating + Heat pump
convectors – Multiple rooms
Setup
A
B
M1
M1
A Main leaving water temperature zone
B Room 1
C Room 2
a External room thermostat
b Remote controller of the heat pump convectors
▪ For each room with heat pump convectors: The heat pump
convectors are directly connected to the indoor unit.
▪ For each room with underfloor heating: Two shut-off valves (field
supply) are installed before the underfloor heating:
▪ A shut-off valve to prevent hot water supply when the room has
no heating demand
▪ A shut-off valve to prevent condensation on the floor during
cooling operation of the rooms with heat pump convectors.
▪ For each room with heat pump convectors: The desired room
temperature is set via the remote controller of the heat pump
convectors.
Value
1 (External room
thermostat): Unit operation is
decided by the external
thermostat.
0 (Single zone): Main
C
b
a
Installer reference guide
13