Building Technologies
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17.04.2008
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en
2 = bypass pump parallel to
burner stage 1
3 = bypass pump with control
via return temperature
sensor B7
100 Switching
differen-
tial bypass pump
6 °C
(1…20)
...................
°C
Function is of importance only if
operating line 99 = 3
Block “Setpoint of return temperature limitation”
101 Setploint of return
temperature limita-
tion / bivalent start-
ing point
--- °C
(--- / 0…140)
...................
°C
Entry --- = function deactivated
For explanation of "bivalent",
refer to operating lines 103 and
104
Block "Type of limitation of return temperature"
102 Type of limitation of
return temperature
0
(0 / 1)
.........................
0 = minimal
1 = maximal
If the plant has a bypass pump
controlled via return tempera-
ture sensor B7, this setting is
inactive. In that case, the type of
limitation is always minimum
limitation
Block “Bivalent maximum limitation of return temperature”
103 Maximum
setback
of boiler temp. set-
point
10 °C
(1…50)
...................
°C
104 End point bivalent
60 °C
(0…140)
...................
°C
25
4
2D01
OpL101 OpL104
TRt
OpL103
BoSp
BoSp = Boiler setpoint
OpL = Operating line
TRt = Return temperature
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