Wilo HELIX VE 1 Series, Инструкция по установке и эксплуатации

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37
English
Installation and operating instructions -
WILO-HELIX VE 1~
8.2 Starting the pump
CAUTION! Risk of damage to the pump!
Never operate the pump at zero flow (closed dis-
charge valve).
WARNING! Risk of injury!
Coupling guards must be in place and secured by all
relevant fasteners when the pump is running.
WARNING! Harmful noise!
High-power pumps may emit a high noise level.
Use appropriate protection when staying close to
the pump for any extended period.
WARNING!
The installation must be laid out in such a way that
there is no risk of injury in case of liquid leakage
(e.g. caused by mechanical seal failure).
- Start the pump.
8.3 Commissioning
NOTE: If the pump is supplied separately, i.e. if it is
not integrated in a system that has been mounted
by us, then the configuration type at the time of
delivery is Mode 1.
8.3.1 Configuration in MODE 1
Manual mode (Fig. 2, 3)
• The duty point of the pump is reached with the
aid of the potentiometer (Fig. A4, ref. 5) by setting
the speed of the motor between 40% and 100%
of the maximum speed.
• We recommend adjusting the potentiometer at
mid-range position for commissioning
.
• The pump can be brought to a standstill (fre-
quency converter under tension) with the remote
control unit (switch).
8.3.2 Pressure regulation MODE 2
Mode with pressure regulation (Fig. A1, A2, A3)
• It is possible to regulate the pressure of the pump
through the addition of a pressure sensor and a
diaphragm pressure vessel.
• The sensor must exhibit an accuracy of <1% and
be used in a range between 30% and 100% of its
measurement range; the reservoir has a useable
volume of at least 8 litres.
• No water in the diaphragm pressure vessel. Pump
up the diaphragm pressure vessel to a pressure
that is 0.3 bar less than the control pressure of the
pump (diaphragm pressure vessel and sensor kit
included as accessories in the scope of delivery).
• The setpoint for the pressure regulation is speci-
fied in two types:
- The setting of the potentiometer indicates for the
setpoint for a value between 10 and 100% of the
measurement range of the sensor. We recom-
mend that the potentiometer be set to maximum
for commissioning.
- An external signal can be connected (0-10 V or
0-20 mA) for setting the setpoint by remote
control.
• The function “Detection of zero volume flow”
makes it possible to stop the pump.
8. Commissioning
8.1 System priming and venting
CAUTION! Risk of damage to the pump!
Never operate the pump in a dry state.
Ensure that the system primed before starting
the pump.
8.1.1 Venting process – Operation with sufficient
supply pressure (Fig. 3)
- Close the two guard valves (2, 3).
- Unscrew the venting plug (6a).
- Slowly open the guard valve on the suction side (2)
and completely fill the pump.
- Tighten the venting plug after the air has
escaped and pumped liquid begins to flow (6a).
WARNING!
If the pumped fluid is hot and under high pres-
sure, the fluid escaping at the venting plug may
cause burns or other injuries.
- Open the guard valve on the suction side com-
pletely (2).
- Start the pump (see chapter 8.2).
- Open the guard valve on the discharge side (3).
8.1.2 Venting process – Pump in suction mode
(Fig. 2)
- Close the guard valve on the discharge side (3).
Open the guard valve on the suction side (2).
- Remove the filling plug (6b).
- Partially open the venting plug (5b).
- Fill pump and suction pipe with water.
- Ensure that there is no air trapped in the pump
and suction pipe. Fill the system until all air is
removed.
- Close the filling plug with the venting plug (6b).
- Start the pump (see chapter 8.2).
- Slightly open the guard valve on the discharge
side (3).
- Unscrew the venting plug from the filling plug to
remove the air (6a).
- Tighten the venting plug when the air has
escaped and pumped liquid begins to flow.
WARNING!
If the pumped fluid is hot and under high pres-
sure, the liquid escaping at the venting plug may
cause burns or other injuries.
- Fully open the guard valve on the discharge
side (3).
- Close the venting plug (5a).