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8.6
Switch-on frequency
8.7
Switching off the pump and
temporary shutdown
8.8
Decommissioning and storage
77
CAUTION! Risk of damage to property!
Risk of damaging the pump or the motor.
• Only switch on the pump again when it is at a standstill.
The switch-on frequency is determined by the maximum tempera-
ture increase of the motor. It is recommended that repeated activa-
tions occur at regular intervals. Under this precondition, the following
guide values apply (see Tab. 8):
Motor power [kW]
< 15
< 110
> 110
Tab. 8: Guide values for switchings per hour
CAUTION! Risk of damage to property!
Danger of damage to the pump seals due to high fluid temperature.
• When pumping hot fluids, the pump must have a sufficient run-on
time after the heating source has been switched off.
CAUTION! Risk of damage to property!
Risk of damaging the pump due to frost.
• If there is a danger of frost, the pump is to be completely drained
to avoid damage.
• Close the check valve in the pressure pipe.
NOTE:
Do not close the check valve in the suction line.
• Switch off the motor.
• If a non-return valve is installed in the pressure pipe, and there is
counter pressure, the check valve can remain open.
• As far as there is no danger of frost, make sure the fluid level is suffi-
cient. Operate the pump every month for 5 minutes. This way, depos-
its are avoided in the pump space.
WARNING! Risk of injury and damage to property!
• The pump contents and rinsing fluid are to be disposed of taking
the legal regulations into account.
• Always wear protective clothing, protective gloves and protective
goggles when working.
• Before storage, thoroughly clean the pump, especially of high-risk
fluids. To do this, completely drain the pump and rinse. The remaining
fluid and rinsing fluid are to be drained, collected and disposed of via
the drain plug.
• The interior of the pump is to be sprayed with a preservative through
the suction and pressure ports. Wilo recommends sealing the suction
and pressure ports using caps afterwards.
• Bare components are to be greased or oiled. For this, use silicone-free
grease or oil.Observe the manufacturer instructions for preservatives.
Max. switchings per hour
15
10
5
WILO SE 07/2013
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