Indirect Application - Siemens RMB795B Basic Documentation

RMH760
Controller 1
T
T
T
Heat source DHW heating
Heat requistion
Heat demand
Heat distr zone
consumer side: 1
Setting values
Controller 1
Illustration notes
Note
96 / 144
Siemens
Building Technologies

11.1.2 Indirect application

RMH760
Controller 3
Controller 2
2
T
1
Heating circuit
fan coil
Heat demand
Heat requistion
Heat distr zone
source side: 1
Heat distr zone Heat distr zone
consumer side: 2 source side: 2
Heat distr zone
consumer side: 3
Controller 2 Controller 3
With this type of application, the individual RXB/RXL room controllers signal their
heat demand indirectly to the heat source via the RMB795B central control unit.
This type of application is used for 2 reasons:
a) From the RMB central control unit, the heat demand signal is passed on to an
external primary controller or heat source via a modulating output or relay
output
b) To reduce the KNX network load, the request signals are collected on the RMB
central control unit and passed on as heat demand signals to the heat source
via a line coupler.
(1), (2) and (3) designate the numbers of the distribution zone.
This type of application can analogously be applied to refrigeration distribution
zones.
Central control unit RMB795B
Distribution zones
RMB795 RXB...
Controller 4
3
Fan coil
room A
Heat demand
Heat demand
Heat requistion
Heat distr zone
source side: 3
Controller 4
Konnex TP1
RXB... RXB...
Controller 5 Controller 6
Fan coil Fan coil
room B room C
Heat demand
Heat demand
Heat distr zone Heat distr zone
source side: 3 source side: 3
Controller 5 Controller 6
CE1P3122en
18.01.2012