Grundfos CMV, Инструкция по установке и эксплуатации

Страница: 10 / 22

En
gl
is
h (
G
B)
10
8. Start-up
8.1 Liquid filling
1. Close the isolating valve on the discharge side of
the pump.
2. Open the isolating valve in the suction pipe
completely before starting the pump.
3. Remove the filling plug. See fig. 4.
4. Fill the pump housing and the suction pipe
completely with liquid until a steady stream of
liquid runs out of the filling hole.
5. Fit and tighten the filling plug.
6. Slowly open the discharge isolating valve while
the pump is running. This ensures venting and
pressure build-up during start-up.
Fig. 4 Filling and drain plugs
8.2 Checking the direction of rotation
This section applies to three-phase motors only.
The motor fan cover has an installation indicator.
See fig. 5. Based on the motor cooling air, it
indicates the direction of rotation of the motor.
Before the motor is started for the first time or if the
position of the indicator has been changed, the
indicator function should be checked, for instance by
moving the indicator field with a finger.
To determine whether the direction of rotation is
correct or wrong, compare the indication with the
table below.
* To reverse the direction of rotation, switch off the
power supply and interchange any two of the
incoming supply wires.
Fig. 5 Installation indicator
The indicator can be placed in various positions on
the motor, but it must not be placed between the
cooling fins close to the screws holding the fan
cover.
The correct direction of rotation is also shown by
arrows on the motor fan cover.
Caution
Do not start the pump until it has been
filled with liquid.
Warning
The system may be under pressure,
and the escaping liquid may be
scalding hot. Care must therefore be
taken to ensure that the liquid does not
cause personal injury or damage to
other components.
In cold liquid installations, special
attention should be paid to the risk of
injury caused by the cold liquid.
When pumping hot or cold liquids, care
should be taken to ensure that persons
cannot accidentally come into contact
with hot or cold surfaces.
Caution
The discharge valve must be opened
immediately after start-up of the pump.
Otherwise the temperature of the
pumped liquid may become too high
and cause material damage.
T
M
0
5
0
5
3
0
1111
Note
If it is difficult for the pump to build up
pressure, it may be necessary to repeat
steps 1 to 6.
Filling plug
Drain plug
Note
Three-phase low-noise motors without
motor fan cannot be checked as
described below. The direction of
rotation must be checked by observing
the motor shaft end.
Indicator field Direction of rotation
Black Correct
White/reflecting Wrong*
T
M
04
0
3
6
0
10
08
Indicator field