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F lo w C o n S e n s o r / S e n s o r H E
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5. Digital sensors
The pump station is equipped with digital sensors in flow and
return of the station. The digital sensor in the return mea-
sures the temperature and the pressure, the digital sensor in
the flow measures the temperature and the flow rate.
In the case of maintenance work or replacement of the
sensors, observe the following steps:
Î
Close valves, drain heat transfer fluid
Î
Remove clip at the digital sensor by pulling it backwards
Î
Remove defective sensor
Î
Insert new sensor and secure with clip
Î
Flush and fill the system
The digital pressure and temperature sensor (return) has
an orifice on one side of the measurement head.
The digital flow rate and temperature sensor (flow) has an
orifice on both sides of the measurement head.
measurement
orifice
6. Mounting of the controller
The controller is already integrated in the station and ready
to plug in. In the case of maintenance or service work, the
controller is to be taken out from the station. Please pay
attention to the following steps:
Î
Switch off the system, disconnect plug from the mains
Î
Remove the front half of the insulation
Î
Unscrew the cross-recessed screw of the front cover
and remove the cover by pulling it upwards
Î
Unscrew the lower cross-recessed screw, push the
controller upwards and remove it
Î
Mounting of the controller has to be carried out in
reverse order
For further information on electrical connection, of
the controller, please see chapter 17.
The controller manual can be found on the pages
10 to 34.
7. Accessories for the station
For the connection between pump station and pipework,
screw connections are required, which are not included
in the scope of delivery. Self-sealing double nipples, solder
nipples or clamp-ring connections can be used. For further
information, please see the product catalogue.
Note
Check the fit of the sensor plugs before com-
missioning the pump station!
WARNING!
Electric shock!
Upon opening the housing, live parts
are exposed.
Î
Always disconnect the con-
troller from power supply
before opening the housing!
Note:
System pressure is measured at the pump inlet.
Therefore, the values measured at the digital
sensor may differ from those shown on the ma-
nometer when the pump is active.