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Neptune solenoid pump NSP-M
10 Operation
Caustic burns or other burns through dosing media!
After connecting the mains supply, residual dosing media in the
dosing head can spray out.
ð
Before connecting the mains supply, connect the dosing lines.
ð
Check that all the screw connections have been tightened
correctly and are leak-proof.
Danger of automatic start up!
The dosing pump does not have an ON/OFF switch and may start to
pump as soon as it is connected to the mains supply. This means that
dosing medium can escape. Depending on the type and hazardous-
ness of the dosing medium, this can result in injury.
ð
Stop the dosing pump before disconnecting it from the mains
supply.
ð
Ensure that the dosing pump has been installed correctly before
connecting it to the mains supply.
10.1 Commissioning the dosing pump
Precondition for action:
ü
The dosing pump was fitted and installed in accordance with the sec-
tions "Fitting the dosing pump", "Hydraulic installation" and
"Electrical installation".
ü
All the mechanical fastenings have been inspected to ensure
adequate load-bearing capacity.
ü
The dosing head screws have been tightened with the correct torque.
ü
All the hydraulic sections have been inspected to ensure they are
adequately leak-proof and that the through flow direction is correct.
i
For initial commissioning, it is advisable to use water as the
dosing medium to check that the system is leak-proof and that
the dosing pump is functioning correctly. Check first whether
undesirable reactions could occur between the actual dosing
medium and the water.
Perform the following working steps:
1. Open the shut-off valves on the suction and discharge sides if
present.
2. Plug in the dosing pump's mains plug to the power supply.
3. If the dosing head is fitted with a vent screw, vent the dosing pump
(see section 10.1.1 "Venting the dosing pump" on page 23).
WARNING
CAUTION
4. Start the dosing pump in accordance with the instructions in section
10.1 "Commissioning the dosing pump" on page 23.
4
The dosing pump primes. If it does not prime enough, use a priming
aid (see chapter 8.7.5 "Priming aid" on page 20).
i
At initial commissioning, it is advisable to prime the pump
without backpressure. For this purpose, we recommend
installing a relief valve on the discharge side of the dosing
pump.
ü
The dosing pump is commissioned.
10.1.1 Venting the dosing pump
Fig. 17: Dosing head venting facility with vent screw
Precondition for action:
ü
The dosing head venting facility connected has been connected in
accordance with the chapter 8.6 "Connecting the dosing head
venting facility" on page 19.
Perform the following working steps:
1. Open the vent screw by one complete turn (looking onto the dosing
head, anti-clockwise).
2. Start the dosing pump. To this end, set the stroke frequency
adjustment to 100%.
3. Stop the dosing pump as soon as there is a continuous throughflow
from the dosing head venting facility with no air bubbles. To this end,
set the stroke frequency adjustment to 0%.
4
The dosing pump stops.
4. Close the vent screw.
ü
The dosing pump is vented.
i
If you are using effervescent media, allow them to flow out
continuously. Open the vent screw such that about one drop
per 1 – 3 strokes escapes.
Operating instructions
Operation
23
Commissioning the dosing pump
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