Multiple Rooms - One Lwt Zone - Rotex HPSU Bi-Bloc Ultra Series Installer's Reference Manual

5 Application guidelines
Setup
A
B
M1
A Main leaving water temperature zone
B One single room
a Remote controller of the heat pump convectors
▪ The heat pump convectors are directly connected to the indoor
unit.
▪ A shut-off valve (field supply) is installed before the underfloor
heating to prevent condensation on the floor during cooling
operation.
▪ The desired room temperature is set via the remote controller of
the heat pump convectors.
▪ The space heating/cooling demand signal is sent to one digital
input on the indoor unit (X2M/35 and X2M/30).
▪ The space operation mode is sent by one digital output (X2M/4
and X2M/3) on the indoor unit to:
▪ The heat pump convectors
▪ The shut-off valve
Configuration
Setting
Unit temperature control:
▪ #: [2.9]
▪ Code: [C-07]
Number of water temperature
zones:
▪ #: [4.4]
▪ Code: [7-02]
External room thermostat for the
main zone:
▪ #: [2.A]
▪ Code: [C-05]
Benefits
▪ Cooling. Heat pump convectors provide, besides heating
capacity, also excellent cooling capacity.
▪ Efficiency. Underfloor heating has the best performance with the
heat pump system.
▪ Comfort. The combination of the two heat emitter types provides:
▪ The excellent heating comfort of the underfloor 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.
Installer reference guide
12
a
Value
1 (External room
thermostat): Unit operation is
decided by the external
thermostat.
0 (Single zone): Main
1 (1 contact): 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.
Underfloor heating or radiators – Thermostatic
valves
If you are heating up rooms with underfloor 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 used as room thermostat
▪ The underfloor 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 a room thermostat (optional equipment
EKRUDAS).
▪ A thermostatic valve is installed before the underfloor 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
Unit temperature control:
▪ #: [2.9]
▪ Code: [C-07]
Number of water temperature
zones:
▪ #: [4.4]
▪ Code: [7-02]
Benefits
▪ Easy. Same installation as for one room, but with thermostatic
valves.
C
T
a
Value
2 (Room thermostat): Unit
operation is decided based on
the ambient temperature of the
user interface.
0 (Single zone): Main
RRGA04~08DAV3 + RHBX04+08DA
ROTEX HPSU Bi-Bloc Ultra
4P495262-1B – 2019.10