Wilo Stratos MAXO Serie Instrucciones De Instalación Y Funcionamiento página 159

8.2 Additional control functions
Installation and operating instructions Wilo-Stratos MAXO/-D/-Z
Setting the control functions
NOTICE
Additional control functions are not available for all applications! See table in section
"Pre-defined applications in the settings assistant [} 168]".
These additional control functions are available depending on the application:
▪ Setback operation
▪ No-Flow Stop
▪ Q-Limit
Max
▪ Q-Limit
Min
Setback operation
If the fluid temperature drops, the pump calculates the setback operation of the heat
generator. It reduces the speed and thus the pump output to a minimum.
In factory setting this function has been deactivated and must be activated if applic-
able.
CAUTION
Material damage caused by frost!
The setback operation may be activated only if hydronic balancing of the system has
been completed! In case of non-compliance, inadequately supplied system parts
may freeze due to frost!
▪ Carry out hydronic balancing!
NOTICE
The additional control function "Setback operation" cannot be combined with the
additional control function "No-Flow Stop"!
No-Flow Stop
The additional "No-Flow Stop" control function continuously monitors the actual
volume flow of the heating/cooling system.
If the volume flow drops below the configured reference volume flow Q
stops. The pump checks every 5 minutes whether the volume flow requirement in-
creases again. If necessary, the pump returns to the previously set control function.
The reference volume flow Q
volume flow Q depending on the pump size.
max
In factory setting this function has been deactivated and must be activated if applic-
able.
NOTICE
The additional "No-Flow Stop" control function is available for suitable applications
only! (See section "Pre-defined applications in the settings assistant [} 168]")
The additional "No-Flow Stop" control function is incompatible with the additional
"Setback operation" and "Q-Limit
Q-Limit
Max
The additional control function "Q-Limit
tions (differential pressure control (∆p-v, ∆p-c), cumulated volume flow, temperature
control (∆T control, T control)). It makes it possible to limit the maximum volume flow
to a set value 10 – 90 % of Q
on the characteristic curve along the limit – never beyond.
NOTICE
When using Q-Limit in non-hydraulically balanced systems, some areas can be in-
Max
adequately supplied.
can be set between 1 % and 20 % of the maximum
ref
" control functions!
min
" can be combined with other control func-
Max
. When the set value is reached, the pump is controlled
Max
en
, the pump
ref
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