Installation and operating instruction
Oil condensing boiler WTC-OB 18-B
6 Operation
83311002 1/2018-03 La
50-132
6.7.4 Buffer control with one sensor
This type of control makes sense, when only the top part of the buffer is to be filled.
The loading of the bottom part of the buffer is carried out by an external heat
source.
DHW release is initiated via sensor B3, the heating operation release via
sensor B10.
Connect buffer sensor to input B10.
Switch-on criteria
B10 < flow setpoint - switching differential (
P 32
)
Switch-off criteria
B10 > flow se switching differential (
P 32
)
Additionally, a three-way valve can be installed at output MFA 1 or MFA 2 for DHW
operation.
Weishaupt energy storage (WES)
If the WTC is operated in conjunction with WES, the following parameter settings
are recommended:
P 32
:
4
K
P 41
:
2
min
P 42
:
50
%
P 43
:
60
%
P 44
:
35
%
P 45
:
50
%
P 50
:
8
K
6.7.5 Buffer control with two sensors
Observe buffer sensor installation manual (Print No. 831613xx).
This type of control should be used, if the appliance is to load a larger buffer area.
DHW release is initiated via sensor B3, the heating operation release via
sensors B10 and B11.
Connect buffer sensor at the top at input B10.
Connect buffer sensor at the bottom at input B11.
Switch-on criteria
B10 < flow setpoint - switching differential (
P 32
)
and
B11 < flow setpoint - switching differential (
P 32
)
Switch-off criteria
B11 > flow se switching differential (
P 32
)
Additionally, a three-way valve can be installed at output MFA 1 or MFA 2 for DHW
operation.
Weishaupt energy storage (WES)
If the WTC is operated in conjunction with WES, the following parameter settings
are recommended:
P 32
:
2
K
P 41
:
2
min
P 42
:
50
%
P 43
:
60
%
P 44
:
35
%
P 45
:
50
%
P 50
:
8
K
