Wilo Economy MHI 16 Series, Инструкция по установке и эксплуатации

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English
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6. Commissioning
• Check that there is a sufficient level of water in
the reservoir and/or check the inlet pressure.
WARNING! The pump must not run dry, as this
would destroy the axial face seal.
• When used for the first time, if it is to be used to
pump drinking water the system must be flushed
through, so that any dirty water present will not
contaminate the drinking water supply.
• Checking direction of rotation (only for rotary
current motors): Check that the pump rotates in
the direction indicated by the arrow on the pump
casing by switching on for a short time. If this is
not the case, interchange 2 phases in the pump
terminal box.
• Only for rotary current motors: Adjust the motor
cut-out to the nominal current given on the ra-
ting plate.
• If available, position float switches or electrodes
for protection against low water levels in such a
way that the pump cuts out if the water level is
so low that air would begin to be sucked in.
• Open the isolating valve at the inlet, open the
vent screw (Figs 1 & 2, 3, SW 19) until the pum-
ped fluid comes out, close the vent screw, open
the isolating valve at the outlet and switch on the
pump.
• Depending on the fluid temperature and the sys-
tem pressure, if the vent screw is completely loo-
sened hot liquid or gas can escape or even shoot
out at high pressure. Beware of scalding.
• Depending on the operating conditions of the
pump or installation (fluid temperature), the
entire pump may be come very hot.
Avoid
touching the pipe owing to the risk of burning.
WARNING!
The pump must not run for longer
than 10 minutes with a flow rate
of Q = 0 m
3
/h. We recommend that when running
continuously the pump should be kept at a mini-
mal flow of 10 % nominal flow.
7. Maintenance
• The pump is almost maintenance free.
• During the running-in period, there may be some
dripping from the axial face seal. Should a more
significant leak occur as a result of substantial
wear, have the axial face seal replaced by a
specialist.
• Increased bearing noise and unusual vibrations
indicate a worn bearing. In this case, have the be-
aring replaced by a specialist.
• Before carrying out any maintenance work,
switch off the pump and ensure that it cannot be
switched on again by unauthorized people. Never
carry out work on a running pump.
• When the pump is exposed to frost or is out of
service for a long period, the pump and pipework
must be emptied in the cold season. Empty the
pump by releasing the drain valve (Figs 1 & 2, 4),
the inlet pipe by releasing the vent screw, and
the outlet pipe by opening the bleeding point.
Figures:
1 Cross-section of the pump with reference numbers.
2. Positioning and pipework of the pump.
3. Drawing showing dimensions.
4. Plan of electrical connections.
WILO SE 04/2016