Parts List; Spare Parts; Preliminary Electrical Tests; Supply Voltage - Grundfos CR Serie Instrucciones De Instalación Y Operación

14. Parts list

Grundfos offers an extensive parts list for each CR pump model.
A parts list typically covers the following items:
• a diagram of pump parts which we recommend to have on
hand for future maintenance
• a list of prepacked service kits covering the pump components
most likely to be exposed to wear over time
• complete chamber stacks needed to replace the rotating
assembly of each model.
These parts lists are available separately from the Grundfos
literature warehouse or as a set with extensive service
instructions in the Grundfos CR Service Manuals.
Fig. 22 Prepacked chamber stack kits
Fig. 23 Prepacked flange kits

14.1 Spare parts

Grundfos offers an extensive list of spare parts for CR pumps.
For a current list of these parts, see Grundfos All Product Spare
Parts/Service Kits Price List, part number L-SK-SL-002.

15. Preliminary electrical tests

Warning
When working with electrical circuits, use
caution to avoid electrical shock. It is
recommended that rubber gloves and boots be
worn, and metal terminal boxes and motors are
grounded before any work is done. For your
protection, always disconnect the pump from its
power source before handling.

15.1 Supply voltage

15.1.1 How to measure the supply voltage

Use a voltmeter (set to the proper scale) to measure the voltage
at the pump terminal box or starter. On single-phase units,
measure between power leads L1 and L2 (or L1 and N for
115 volt units). On three-phase units, measure between:
– Power leads L1 and L2
– Power leads L2 and L3
– Power leads L3 and L1.
Fig. 24 Measuring supply voltage

15.1.2 Meaning of supply voltage measurement

When the motor is under load, the voltage should be within
+ 10 %/- 10 % of the nameplate voltage. Larger voltage variation
may cause winding damage. Large variations in the voltage
indicate a poor electrical supply and the pump should not be
operated until these variations have been corrected. If the voltage
constantly remains high or low, the motor should be changed to
the correct supply voltage.
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