Assembly/installation
29
4.4
Connections
4.4.1 Pipes
WARNING
–
If the the pressure can rise above the maximum permissible pressure of the pump, a
pressure relief valve or automatic pressure cut-out is required.
Connect the pump with pipes and hoses like this
•
Suction side
o
Pipes are sufficiently dimensioned. Too small a pipe cross-section can lead to a reduced pump
performance and to cavitation.
o
Pipes withstand the vacuum pressure and do not collapse.
o
Pipes withstand the temperatures of the fluid and the cleaning (CIP and SIP).
•
Pressure side
o
Pipes are sufficiently dimensioned.
o
for the pumping and operating pressure
o
the operating and fluid temperature
4.4.2 Electric cables
NOTE
–
Operate the pump only with the specified mains voltage and mains frequency to avoid damage to
the control panel and the pump drive (see chapter 3.2 Labelling on page 7).
DANGER
–
Electric current, fatal electric shock. Have the pump connected only by specialised
personnel and disconnect the power when working on the electrical system.
►
Connect the pump to a protective earth system.
o
Minimum cross-section 2.5 mm² (AWG14)
o
Protected against mechanical damage over the entire length.
►
Install the pump with a suitable preliminary fuse.
►
RCCBs must be type B or B+.
►
Plug connections must be suitable for industrial applications in accordance with IEC 60309.
►
If the risk analysis demands, integrate the pump into an emergency stop system via its electrical
connection.
4.4.3 Collection vessel
CAUTION
–
Fluid can spill if the diaphragm bursts. The fluid escapes through a hole in the ring drive. Place
a collection vessel under the ring drive.
If the pump is operated unsupervised for a long period of time, the special leakage sensor accessory is
recommended for diaphragm monitoring. This applies especially for pumping dangerous fluids.
4.5
Test run
NOTE
–
A test run is recommended before using the pump for the first time:
►
Carry out a test run with a safe fluid, e.g. water. In this way you can acquaint yourself with the function of
the pump.
►
Check the suitability of the pump by representative preliminary tests.
►
Check the compatibility of the pump with the fluid to be pumped. Fluids containing oil or solvents can
lead to swelling or destruction of the elastomer materials. Especially check these parts:
o
QF5C (chapter Connecting nozzle PQ5U3.5.2): Item 1, item 2, items 6.1
–
6.5
o
PQ5U (chapter 3.5.3): Item 1
►
Consult the Material-and-Certification-Guide or contact our Service if in doubt.
4.6
Parameter settings
A separate operating manual is available for pumps with the QCON control panel.
