Table of Contents
Advertisement
Goodnal STP ST041 Biological Treatment (KSB Amamix Direct Installation and Operation Manual) Vendor Manual
Visual inspection
Temperature sensors in
the motor winding
Leakage sensor in the
motor (also mechanical
seal leakage)
Recommended quality of
lubricant
Alternative
30 of 52
Q-Pulse Id VM385
7 Servicing/Maintenance
2. Replace any damaged components by original spare parts.
DANGER
Defective earth conductor
Electric shock!
▷ Never switch on a submersible mixer with a defective earth conductor.
7.2.1.3 Checking the shackle/lifting rope
✓ The submersible mixer has been lifted out of the fluid handled and cleaned.
1. Inspect the shackle/lifting rope and all fixing elements for visual damage.
2. Replace damaged components by original spare parts.
7.2.1.4 Checking the sensors
CAUTION
Excessive test voltage
Damage to the sensors!
▷ Never test the sensors with voltages exceeding 30 V.
The tests described below measure the resistance at the core ends of the power
cable. The actual function of the sensors is not tested.
Table 8: Resistance of temperature sensors in motor winding
Measurement between terminals ...
10 and 11
If the tolerances indicated are exceeded, disconnect the power cable at the
submersible mixer and repeat the check inside the motor.
If tolerances are exceeded here, too, the winding will have to be replaced.
Table 9: Resistance of leakage sensors
Measurement between terminals ...
9 and earth conductor (PE)
Lower resistance values suggest water ingress into the motor. In this case the motor
must be opened and overhauled.
If mechanical seal leakage is monitored, completely drain the oil chamber first, then
repeat the measuring procedure with the motor in horizontal position. If the
measured value is okay now, the motor is dry inside but the outboard mechanical
seal is defective.
7.2.1.5 Lubrication and lubricant change
7.2.1.5.1 Quality of lubricant
The lubricant reservoir is filled at the factory with an environmentally friendly, non-
toxic lubricant of medical quality (unless otherwise required by the customer).
The following lubricants can be used for lubricating the mechanical seals:
▪ Thin-bodied paraffin oil; made by Merck, No.: 7174
▪ Merkur white oil Pharma 40; made by DEA
▪ Equivalent brand of medical quality, non-toxic
▪ Water-glycol mixture
▪ All non-doped and doped motor oils of classes SAE 10W to SAE 20W
Amamix® direkt
Active 29/10/2013
Resistance
100 Ω - 1000 Ω
Resistance
> 60 kΩ
Page 30 of 52
Advertisement
Table of Contents
