Mixed Circuits; Boiler And Chiller Control; Room Temperature Control; Adaption To Used System - Rehau NEA SMART 2.0 Service Manual

A local pump is started, whenever a room connected to
a manifold supplied directly from a source has triggered
a demand signal.
Rooms which are supplied by manifolds connected to a mixed
circuit do not demand the local pump
The global pump as a central supply pump is started, when one of the
other pumps is running.
The pump run times are determined by the classification of the pump
as conventional or high efficiency pump.
4.5.3

Mixed circuits

Up to 3 mixed circuits can be controlled by the system, each mixed
circuit is controlled by an U-Module, configured for this use.
A mixed circuit can be configured for:
- Heating only
- Heating and cooling
- Cooling only
For the supply of the following systems:
- Underfloor
- Wall
- Ceiling
The parameters which influence the flow temperature are set
according to the operational purpose of the mixed circuit, but can be
adapted individually.
Relevant parameters
Web page:
Home  Installer  Settings  Mixed circuits
App:
Settings  Installer  Control parameter  Cooling  Circuits
Settings  Installer  Control parameter  Heating  Circuits
4.5.4

Boiler and chiller control

The boiler and chiller demand signal is an on/off signal coming from a
potential free contact of the Base.
The signal is triggered at the end of the logical chain shown in figure 4-2
under consideration of minimum run time and pause time.
The demand signal of a mixed circuit is created only
when the opening of the mixing valve exceeds a
minimum level.
Relevant parameters
Web page:
Home  Installer  Settings  Devices
App:
Settings  Installer  Devices  Submenus
4.6

Room temperature control

4.6.1

Adaption to used system

The parameters, which influence the control behavior, are pre-set
automatically when the system (floor / wall / ceiling) is selected.
The parameters for the system in general can be adapted, but not for
each room individually.
It is possible, that in one room there are different
heating and cooling systems.
Each system has its own parameter set. This means, that in
one room there are up to 3 PI control mechanism running
independent from each other.
Relevant parameters
Web page:
Home  Installer  Settings  Control
App:
Settings  Installer  Control parameter  Rooms
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