Maintenance
Care must be taken to ensure that escaping water does not
cause injury to persons or damage to the motor or other
components. In hot water installations, special attention
should be paid to the risk of injury caused by scalding
hot water. See also page 3, “Safety Warning” and “Shock
Hazard.”
Pumps - Pump bearings and shaft seal are maintenance-
free. If the pump is to be drained for a long period of inac-
tivity, remove one of the coupling guards to inject a few
drops of silicone oil on the shaft between the pump head
and the coupling. This will prevent the shaft seal faces from
sticking.
Motor Bearings - Motors which are not fitted with grease
nipples are maintenance-free sealed bearings. Motors fit-
ted with grease nipples should be lubricated according
to the greasing instructions in the CR Pump Installation
and Operating manual. In the case of seasonal operation
(motor is idle for more than six months of the year), it
is recommended to grease the motor when the pump is
taken out of operation.
Frost Protection - Pumps which are not being used during
periods of frost should be drained to avoid damage. Drain
the pump by loosening the vent screw in the pump head
and by removing the drain plug from the base. Do not
tighten the vent screw. Replace the drain plug. Pressure
transducers should also be removed to avoid damage. To
restart operation, see “Start-Up.”
Control Panel - It must be kept clean and dry. Systems with
cooling fans have filters that should be cleaned periodi-
cally. No other periodic maintenance is required.
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