46 | Heatronic settings
6 720 644 143 (2010/09)
The following can be selected as the pump characteristic
map:
• 00 Pump step adjustable, service function 1.d
(Æ page 46 )
• 01 Constant pressure high
• 02 Constant pressure medium
• 03 Constant pressure low
• 04 Proportional pressure high
• 05 Proportional pressure low
The factory setting is 04.
Fig. 45 Constant pressure
Fig. 46 Proportional pressure
Legend for Fig. 45 and 46:
1-5 Characteristics
H Pressure
Q Water circulation rate
Service function 1.d: Map pump step (heating)
This service function corresponds to the pump speed
switch used on conventional heating pumps.
However, the setting is only active if function 1.C (Pump
map (heating)), is set to 0.
The factory setting is 07.
Fig. 47 Characteristics
Key to Fig. 47:
1-7 Characteristics
H Pressure
Q Water circulation rate
Service function 1.E: Pump switch mode
• Pump control mode 0:
The BUS controller controls the central heating circuit
pump.
• Pump control mode 1:
The pump is controlled by the central heating flow
temperature control.
• Pump control mode 2 (factory setting):
For heating systems with room thermostat. The
central heating flow temperature control controls
only the gas, the pump is not affected. The room
thermostat controls both the gas and the pump. The
pump and fan have an over-run time of between 15 s
and 3 min.
• Pump control mode 3:
Not applicable.
Service function 2.b: Maximum flow temperature
The maximum CH flow temperature can be set to
between 35 °C and 88 °C. Even if the CH flow
temperature control is set higher, the setting entered for
2.b (Max. flow temperature) is not exceeded.
The factory setting is 88.
200 400 600 800
1200
14001000 1600
0
0,6
0,5
0,4
0,3
0,2
0,1
0
(bar)
H
Q
(l/h)
6 720 612 126-43.1O
1
2
3
200 400 600 800
1200
14001000 1600
0
0,6
0,5
0,4
0,3
0,2
0,1
0
(bar)
H
Q
(l/h)
6 720 612 126-44.1
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