Wilo Economy MHIE 1 Series, Инструкция по установке и эксплуатации

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6.4 Starting
Depending on the temperature of the fluid and
on the operating cycles of the pump, the sur-
face temperature (pump, motor) may exceed
68°C: mount suitable personnel protection
apparatus as needed.
The pump should not be permitted to be
operated longer than ten minutes with
zero flow when the gate valve is closed
on the pressure side.
We recommend that a minimum flow level of
approximately 10% of the nominal throughput of
the pump be maintained in order to ensure that
no blow hole forms in the upper part of the pump.
- Open the stop valve on the pressure side and start
the pump.
- Check the uniformity of the pressure on the
discharge side with the aid of a pressure gauge;
bleed the pump again or refill it in the event of
deviations.
- Check current consumption. The current con-
sumption may not exceed the specification on
the pump shield.
7 Maintenance
The pump(s) must be de-energised and
all non-authorised restarts must be pre-
vented before any maintenance work is
done.
Never undertake maintenance work while the
pump is running. Always keep pump and motor/
frequency converter in clean condition.
When set up in frost-free locations, the pump
should not be emptied, even with prolonged
decommissioning.
To prevent blockage of the shaft and of the
hydraulic apparatus, the pump is to be emptied
during periods of potential frost by unscrewing
the drainage and inlet/bleeding screw
(Fig. 1+2,
Pos. 5+6). Screw both screws back in without
tightening them.
Replacement frequencies
NOTE: These can only be regarded as recommen-
dations, because the frequency of replacement
is dependent on operating conditions within the
group involving
• Temperature, pressure and quality of the fluid for
the mechanical seal.
• Pressure and ambient temperature for the motor
and other components.
• Frequency of start-up: continuous or intermittent
operation.
ATTENTION!
ATTENTION!
WILO SE 04/2016