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Hydraulic Components SDC / DHC
194 EN2H-0221GE51 R0808
Tank parallel operation (combined operation: hot-water
loading/heating)
WEZ1 WEZ2
WEZ3 WEZ4 WEZ5
10s 10s 1min 1min
2min 2min 2min 2min
• Connection up to the stage of parameter 09 with minimum
delay for hot-water loading
• In case of further need via heating, further connection with
configured delay of parameter 02
• Reversion with configured delay parameter 03
7.3.5.2 Circulation pump (CIR.)
This function is only available, if a variable output is assigned to a
circulation pump
The output controls a hot-water circulation pump.
The use of the economy interval minimises the usual circulation
losses owing to adjustable switch-on intervals during operation
and determines the standstill time of the hot-water circulation
pump within an adjustable period (economy interval).
This parameter determines the length of the period and hence the
duration of the pause in a circulation pump pulse operating mode.
Economy interval
Pause
= Economy interval
Period duration
- Economy
interval
Pulse
The switching-on degree is calculated from the ratio:
n = Pulse time/Period duration x 100 (%)
Example:
With an standstill time of 15 min. and a period of 20 min., the
circulation pump will run for 5 min. before the subsequent pause
of 15 min.
The following is used to calculate the switching-on degree:
n = 5/20 = 25%
In this function a hot-water circulation pump can be coupled to an
existing automatic program of a control circuit with regard to the
NOTE
Function
Economy interval
(pulse)
Economy interval
(period duration)
Switching times