Two-Stage Heating For Floor And Radiators - Theben KNX Series Handbook

5.4 Two-stage heating for floor and radiators

A room is heated via the floor and additionally via radiators.
Both heating sources have very different requirements and are therefore controlled via 2
separate heating stages.
The first heating stage controls and limits the floor temperature (slow, inert heating).
The second heating stage controls one or several radiators (fast heating).
The floor temperature is measured by an external floor sensor (Order No. 907321) at input E4.
Here, the focus is on the 2 heating stages with floor temperature limitation.
The automatic change of the operating mode via time switch or presence detector, as well as
the change of the operating mode and the frost protection function are not explicitly mentioned
again (see previous examples).
5.4.1 Devices
• RAMSES 718 P/S (Order no.7189210/7189200)
• HM 6 T (4940240)
5.4.2 Overview
5.4.3 Objects and links
RAMSES 718 P/S
No.
Object name
18 Heating actuating value
Actuating value additional
19
heating stage
RAMSES 718 P / RAMSES 718 S
HM 6 T
No.
Object name
Channel H1 – continuous
0
actuating value
Channel H2 – continuous
12
actuating value
Typical applications
Comment
Actuating value for
underfloor heating
Actuating value for the
radiators
83