15
Pump NB/FB/WP/SM/F
Version: 27216 - E
Schmalenberger GmbH + Co. KG
D-72072 Tübingen / Germany
3.2
Operation
3.2.1
Operation Monitoring
In most cases the pump is controlled from the central control unit of the entire system. Data
associated with the design of the pump and related to the intended purpose (see
specification) must be observed as a precondition for problem-free functionality.
1.
Temperature of the pumping liquid.
-Do not operate the pump at temperatures
higher than those listed in the original specification.
2.
Noise emission.
- The acoustic power or sound pressure level is determined by the
motor as well as the pump, and especially by the installation situation. Special
protective measures must be taken to reduce transmission of structure-borne or air-
borne sound.
3.
Switching frequency.
- To avoid large temperature increases in the motor and
excessive load on the pump, motor and bearings, the permissible rate of one switching-
on process must not be exceeded:
4.
Minimum quantity.
-If the nature of the system includes the possibility of running
against the shut-off element closed on the pressure end, a minimum flow of
(for t -30 to +70 °C) - 15% of Qopt.
(over +70 to +110 °C) - 25% of Qopt
must be provided.
5.
Density of the pumping liquid.
- The power consumption of the pump varies
proportionally to the density of the pumping medium. To avoid overload on the motor,
the density must match the specification data.
3.2.2
Other Requirements
Installed reserve pumps must be placed in operation briefly once a week to ensure they
are ready for operation. The duration of operation should be about 15 minutes each time.
It is especially important to observe the points listed below during manual
operation of the pump:
With motor output
Max. number of switchings/h
Up to 3 kW
20
From 4 to 11 kW
15
From 11 to 45 kW
10
