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Building Technologies Division User Manual LMS14… CC1U7471en
6 The settings in detail 28.01.2015
6.13 Cascaded systems
6.13.1 Addressing devices
For configuration of the heat source cascade, the relevant address is the LPB device
address:
Device address = 0: No communication, standalone device.
Device address = 1: Cascade master
Collects the requests for heat, controls the heat source
sequence within the cascaded system, performs
common functions (maintained return temperature,
cascade lock, shifting DHW priority, etc.).
Own heat source is integrated in the cascaded system
like a cascade slave.
Device address = 2...16: Cascade slave
Controls own heat source based on information received
from the cascade master.
All consumers (heating circuit, DHW, pumps H1/H2/H3) in the cascade master can still
be used. In addition, consumers (heating circuit and pumps H1/H2/H3) can be used in
the cascade slave. All requests for heat are forwarded to the cascade master (with the
exception of HW separate circuit (5736)).
Functions only used with device address 1 (buffer storage tank, system pump/primary
controller) are only available with the cascade master.
Warning!
In the case of instantaneous HW systems with Instant WH ctrl elem Q34 and
DHW controlling element (5731) = Diverting valve, Basic position DHW div
valve (5734) in connection with cascade applications must be set to Heating
circuit, thus ensuring that the diverting valve is in the right position when there
is a heat request from the cascade.
Note!
If the cascade master unit (LPB unit address 1) within a cascade is reset following a
fault, this triggers a software reset on the cascade master.
As a result, all the cascade calculations are reset and all the boilers are locked again
for the time being.
The system then behaves in the same way as after Power ON and, if necessary,
starts releasing the boilers in the cascaded system consecutively based on the
temperature conditions and configuration (release integral, switch-on delay, etc.).
Note!
Further information is available in Basic Documentation P2359de_08 for the Albatros
range.
All parameters in connection with the cascade are to be set on the cascade master.
Per LPB segment, one heat source cascade can be operated. Heat sources with the
same segment address belong to the same cascade. If there is more than one
cascade, none of them is allowed to be in segment 0.
Line no. Operating line
6600 LPB address
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