en – Original Instructions
Installation, Operation and Maintenance Manual
31
5.4
Air purge
After filling the system with liquid, any residual air shall be removed from the pump housing. To
aid this effort, the standard pump
models with control knob are equipped with a built-in air
purge function.
For activation, turn the knob to the right end position for 5 seconds (the air purge symbol is
shown on the scale, see Figure 15). A 10 minute long air purging sequence starts, which
includes several max and min speed sequences, stoppages. It is indicated with the knob flashing
green. You may set the knob to the desired speed level during the air purge sequence. After
the sequence is finished, the pump will continue to operate in the preset speed level.
You can interrupt the air purge sequence via turning the knob under its halfway position and
turning it back to the end position again. Or simply switch off and then on the mains power.
Audible flow noises indicate if there is still air in the pump. In this case repeat the air purging.
Figure 15
5.5
Setting the timer
To increase the overall efficiency of a hot water recirculating system, some pump models are
equipped with a plug-in timer unit (it is also available as an installation kit for retrofitting; for
ordering, contact your local distributor). The timer control is programmable to turn the circulator
on and off automatically at preset times. This allows domestic hot water to be circulated only at
the expected times of high usage.
NOTICE:
The timer mechanism allows turning the setting dial only in clockwise direction (as indicated by
the arrows as well). Do not force it counterclockwise, it may damage the unit.
Timer programming
1.
Using a small flat-head screwdriver, pry the
timer cover open and fold it under the unit.
2.
Set the current time by turning the setting
dial in the direction of the arrows, until the
actual time is aligned with the pointer
above the dial face.
The illustration shows the correct setting in
case the actual time is 6 a.m.
The scaling is for a whole 24 hours in a
graduation of 30 minutes.
The ratchet mechanism allows turning the
dial only in clockwise direction, do not
force it counterclockwise. One “click”
represents approx. 5 minutes.
