6 Commissioning/Start-up/Shutdown
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Etanorm V
1228.87/01-EN
6.1.4 Shutdown
1. Close the shut-off valve in the discharge line.
2. Switch off the motor and make sure the pump set runs down smoothly to a
standstill.
NOTE
If the discharge line is equipped with a non-return or check valve, the shut-off
element may remain open provided that the system conditions and system
regulations are considered and observed.
For prolonged shutdown periods:
1. Close the shut-off element in the suction line.
CAUTION
Risk of freezing during prolonged pump shutdown periods
Damage to the pump!
▷
Drain the pump and the cooling/heating chambers (if any) or otherwise protect
them against freezing.
6.2 Operating limits
DANGER
Non-compliance with operating limits for pressure, temperature and speed
Explosion hazard!
Leakage of hot or toxic fluid handled!
▷
Comply with the operating data indicated in the data sheet.
▷
Never use the pump to handle fluids it is not designed for.
▷
Avoid prolonged operation against a closed shut-off element.
▷
Never operate the pump at temperatures exceeding those specified in the data
sheet or on the name plate unless the written consent of the manufacturer has
been obtained.
6.2.1 Ambient temperature
CAUTION
Operation outside the permissible ambient temperature
Damage to the pump (set)!
▷
Observe the specified limits for permissible ambient temperatures.
Observe the following parameters and values during operation:
Table 14:
Permissible ambient temperatures
Permissible ambient temperature
Value
Maximum
40 °C
Minimum
See data sheet.
6.2.2 Frequency of starts
The frequency of starts is usually determined by the maximum temperature increase
of the motor. This largely depends on the power reserves of the motor in steady-
state operation and on the starting conditions (DOL, star-delta, moments of inertia,
etc). If the starts are evenly spaced over the period indicated, the following limits
serve as orientation for start-up with the discharge-side gate valve slightly open:
Summary of Contents for Etanorm V
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