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for details on which listed heat meters fulfill this criterion and can be used for limitation pur
-
poses.
In case of battery-operated heat meters in particular, please note that some makes react with
communication intervals if they are polled too frequently. Other makes could use up their bat
-
teries too quickly. The technical documentation TV-SK 6311 provides more details on these
matters.
4
A system with simultaneous room heating and DHW heating requires maximum energy.
4
A system with a fully charged storage tank which performs only room heating requires less
energy.
4
A system which suspends room heating during DHW heating requires less energy.
As a result, three different maximum limit values can be specified:
4
Max. limit value
to determine the absolute upper limit
4
Max. limit value for heating
for exclusive operation of the room heating
4
Max. limit value for DHW
for exclusive operation of the DHW heating
In all systems without DHW heating or without heating circuit, only the
Max. limit value
for the
flow rate or capacity can be set.
Flow rate limitation
The settings which are to made for the flow rate limitation are mainly contained in function
block FB30 as function block parameters. Only after selecting the type of limitation “At“ for out-
door temperature dependent limitation (which automatically means a 4-point characteristic),
four outdoor temperature dependent maximum limits for heating need to be set in the 4-point
characteristic menu. After selecting “- - -“, set
Maximum limit for the system
,
Maximum limit for
heating
and
Maximum limit for DHW
,
Minimum limit
and the
Limiting factor
that appear in this
order. The
Limiting factor
determines how strongly the controller responds when the limit values
are exceeded in either direction.
Function
WE Configuration
Meter bus OFF
254**
1434
Cont
FB29 = ON
Meter bus address for WMZ 1 to 3 (ST.-NO) / 0 to 255
Model code WMZ 1 to 3 / 1434, CAL3, APAtO, SLS
Reading mode WMZ 1 to 3 / 24h, Cont, CoiL
** WE for WMZ2 and 3: 255
72 EB 5476 EN
Installation