Mechanical Installation; Electrical Connection; Starting Up The Product; Shaft Seal Run-In - Grundfos CM Booster PS PT Montage- Und Betriebsanleitung

5. Mechanical installation

DANGER
Electric shock
Death or serious personal injury
- Switch off the power supply before you
start any work on the product. Make
sure that the power supply cannot be
accidentally switched on.
Make sure that the pump is not stressed
by the pipes.

6. Electrical connection

Carry out the electrical connection according to local
regulations.
Check that the supply voltage and
frequency correspond to the values stated
on the nameplate.
DANGER
Electric shock
Death or serious personal injury
- Never make any connections in the
pump terminal box unless the power
supply has been switched off.
Connect the pump to earth.
DANGER
Electric shock
Death or serious personal injury
- Power cables without a plug must be
connected to a power disconnecting
device incorporated in the fixed wiring
according to the local wiring rules.
We recommend that you fit the permanent
installation with an earth leakage circuit
breaker (ELCB, GFCI) or a residual-
current circuit breaker (RCD) of type B
with a tripping current below 30 mA.
Single-phase motors incorporate a thermal switch
and require no additional motor protection.
Connect three-phase motors to an external mains
switch and a motor-protective circuit breaker.
8

7. Starting up the product

Fill the system with liquid before starting
the pump.

7.1 Shaft seal run-in

The shaft-seal faces are lubricated by the pumped
liquid. As a result, there may be a certain amount of
leakage from the shaft seal.
When the pump is started up for the first time, or
when a new shaft seal is installed, a certain run-in
period is required before the leakage is reduced to
an acceptable level. The time required for this
depends on the operating conditions, i.e. every time
the operating conditions change, a new run-in period
will be started.
Under normal conditions, the leaking liquid
evaporates. As a result, no leakage is detected.

8. Adjusting the pressure

See the default setting in the quick guide.
If the pressure is not suitable for the application,
adjust according to the following instructions.
8.1 Calculating the start and stop
pressures
The start pressure is the sum of these variables:
• required minimum pressure at the highest
tapping point
• head from the pump to the highest tapping point
• pressure loss in pipes.
Recommended stop pressure:
Start pressure +0.8 - 1.5 bar.
Make sure that the stop pressure does not
exceed the maximum pump outlet
pressure.