Circulating Pumps CP50 Installation And Operating Instructions Manual page 14

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5.2 Filling and bleeding
• Properly fill the system.
• The pump rotor space bleeds automatically after a short
time in operation. This may cause noises. If necessary,
switch off and on repeatedly to accelerate the venting.
Dry running for short periods will not harm the pump.
5.3 Adjusting the pump
By turning the knob, the control mode symbol is selected
and the desired delivery head or speed stage is set.
Selection of the control mode
Variable differential pressure (∆p-v): also see Fig. 2a
The pump for the control mode ∆p-v is set on the left of the
middle position.
3 speed stages: also see Fig. 2b
The pump is set for three speed stages on the right of the
middle position.
NOTE: If a standard heating pump is replaced by this high-
efficiency pump, the knob can be set (as a reference point
for setting the pump setpoint) on the first, second or third
pump curve (c1, c2, c3) on the scale for three speed stages.
Setting of the delivery head/speed stage
If the knob is turned from the middle position to the left or
to the right, the set setpoint or the selected speed stage
increases. If the knob is turned back again to the middle
position, the set setpoint or the selected speed stage is
reduced.
When the knob is turned in the ∆p-v control mode, the set-
tings correspond to the following setpoints:
10 4172332-Ed.01 (2012/07)