Theben KNX Series User Manual

Typical applications
RAMSES 718 P / RAMSES 718 S 83
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
No.
RAMSES 718 P/S
No.
HM 6 T
Comment
Object name
Object name
18 Heating actuating value 0
Channel H1 – continuous
actuating value
Actuating value for
underfloor heating
19
Actuating value additional
heating stage
12
Channel H2 – continuous
actuating value
Actuating value for the
radiators

Theben KNX Series Specifications

General

Communication Protocol	KNX
Ambient Temperature	-5°C to +45°C
Storage Temperature	-25°C to +70°C
Protection Class	IP20
Relative Humidity	5% to 95%, non-condensing
Operating Voltage	24 V DC (via KNX bus)