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8 Commissioning
WARNING! Risk of injury and damage to property!
Incorrect commissioning can lead to injuries to persons and
damage to property.
• Commissioning by qualified personnel only!
• Depending on the operating status of the pump or system (fluid tempera-
ture), the entire pump can become very hot.
Touching the pump can cause burns!
8.1 Operation (model with operating knob only)
The pump is operated using the operating knob. By turning the knob the differ-
ent control modes can be selected and the delivery head or constant speed (Fig.
2 RKA / RKC) can be set.
Factory setting of the pump: RKA model: p-c max.
8.1.1 Filling and venting
Fill and vent the system correctly. If direct venting of the rotor chamber is
required, the venting function (RKA model) can be started manually.
By turning the operating knob to the symbol for venting in the middle position,
the venting function is activated after 3 seconds.
The venting function lasts 10 minutes and is indicated with quick green LED
blinking. Noises may be heard during the venting function is running. The proc-
ess can be stopped if desired by turning the knob.
After 10 minutes, the pump stops and goes automatically in p-c max mode.
Afterwards, the control mode and the delivery head must be set if the pump
will not be operated in p-c max mode.
NOTE: The venting function removes accumulated air from the rotor chamber of
the pump. The venting function on the pump does not vent the heating system.
8.1.2 Setting the control mode
To select the control mode symbol and set the desired delivery head / constant
speed, turn the operating knob.
Variable differential pressure ( p-v): Fig. 2 RKA / RKC, Fig. 3a
The knob for the control mode p-v is set on the left of the middle position.
Constant differential pressure ( p-c): Fig. 2 RKA Fig. 3b
The knob for the control mode p-c is set on the right of the middle position.
Constant speed I, II, III: Fig. 2 RKC, Fig. 3c
The operating knob for a fixed constant speed is set on the right of the middle
position. In this operating mode the pump is not self regulating its speed. The
pump is operating constantly with a fixed speed.
NOTE: All settings are retained if the mains supply is interrupted.
20
RKC model: max. speed III
WILO SE 05/2012
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