Design and functions | 4
Hidrostal AG 19 / 49
4.2 Electric motors
1 Stator housing
2 Opening to drain, fill in, and test the oil
3 Flushing port to remove obstructions from behind the impeller
The pump is equipped with a submersible motor that is installed in the pump
sump.
Pumps of the types A2QR2, A2QR4, A2QS2, A2QS4, A2QE4, BE2, and
BK3 can be operated when they are immersed or when they are
permanently outside the liquid. The types A2QE2, BN2, and BN3 must
always be immersed during operation (exception see chapter Pumping the
sump dry [▶28]).
4.3 Operational safety components
NOTICE
Incorrect design of system control.
Bypassing of safety components.
Risk of damage to property!
• ALL of the safety components below will only function correctly if the
system control analyses them correctly.
The following components can be installed:
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