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Watson-Marlow Bredel E-Manuals
file://M:\staging\pdfs-global\m-521-cc-gb-03.htm
8 Unit installation
Site the pump on a flat, horizontal, vibration-proof surface. allowing a free flow of air
around it. Ensure that there is 1m of straight, flexible tubing before the pumphead inlet and
after the pumphead outlet. Close-coupled simplex pumps must be bolted down with four M8
bolts through the gearbox foot mounting holes. The pumphead will need to be removed
before locating the bolts. See section 17: 520RC and 520R2C maintenance.
Duplex pumps are baseplate-mounted as standard.
The pump may be set up so that the direction of rotor rotation is clockwise or anti-
clockwise, whichever is convenient. Please note, however, that tube life will be greater if
the rotor rotates clockwise; and that performance against pressure will be maximised if the
rotor rotates anti-clockwise.
9 Standard AC three-phase motors (integrated)
9.1 AC (IEC) three-phase motors: motor wiring
For Nema C face motors or other options follow manufacturers' guidelines.
Ensure that
the mains
voltage and
frequency
are in
accordance
with the
motor
nameplate
information.
Secure
protective
conductor
connections.
If the motor
runs in the
wrong
direction for
your needs,
interchange
any two
phases.
Close the terminal box and unused cable entrance holes in a dust-tight and watertight
manner, ensuring that the IP55 protection is maintained.
A current overload relay should be fitted to a contact-breaker appropriate to the current
rating of the motor. Connect the motor in accordance with the wiring diagram in the
motor terminal box.
When a thermal protection switch is fitted in the motor, the leads will be found in the
motor terminal box. They should be connected to open the circuit and stop the pump if
an over-temperature condition occurs.
Page 8 of 47
14/12/2009
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