Wilo -Flumen OPTI-TR 22 Instrucciones De Instalación Y Funcionamiento página 37

9.5.6.2 Testing the resistor of the exter-
nal electrode for sealing chamber
control
9.5.7 Visual inspection of accessories
9.5.8 Oil change
9.5.8.1 Oil change seal housing
(TR 20-1/22/28-1, TRE 20)
Fig. 11: Oil change
Installation and operating instructions Wilo-Flumen OPTI-TR 20-1, 22, 28-1, 30-1, 40-1, Wilo-Flumen EXCEL-TRE 20, 30, 40
Maintenance and repair
‡
Ohmmeter available.
1. Measure the resistance.
⇒ Measured values "infinite (∞)": Monitoring device ok.
⇒ Measured value ≤ 30 kOhm: Water in oil. Change oil!
▶ Resistance checked. If the measured value still deviates after the oil change, consult the
customer service.
The accessories must be checked for:
ƒ
Correct attachment
ƒ
Proper function
ƒ
Signs of wear, e.g. cracks caused by vibrations
Any detected defects must be repaired immediately or the accessories must be replaced.
WARNING
Operating fluid under pressure!
High pressure can build up in the motor! This pressure escapes when opening the screw
plugs.
• Screw plugs opened carelessly can be ejected at high speed!
• Hot operating fluid may spray out!
⇒ Wear protective equipment!
⇒ Allow the motor to cool down to ambient temperature before carrying out any
work!
⇒ Adhere to the prescribed sequence of work steps!
⇒ Unscrew the screw plugs slowly.
⇒ As soon as the pressure escapes (audible whistling or hissing of air), do not turn
any further!
⇒ Only when the pressure has been completely released, fully unscrew the screw
plug.
+/- Drain/fill seal housing oil
‡
Protective equipment used!
‡
Mixer has been removed, cleaned, and disinfected.
1. Place mixer on a firm work surface in a horizontal position.
CAUTION! Material damage! Do not set the mixer down on the propeller! Use an ap-
propriate pedestal for the propeller diameter.
2. Secure the mixer against falling over and slipping!
3. Position a suitable tank to collect the operating fluid.
4. Unscrew the screw plug (+/-).
+/-
5. Tilt the mixer and allow the operating fluid to drain out.
6. Check the operating fluid:
⇒ Operating fluid clear: Operating fluid can be reused.
⇒ Operating fluid contaminated (black): fill with new operating fluid.
⇒ Operating fluid milky/cloudy: Water in oil. Minor leakage through the mechanical
seal is normal. If the ratio of oil to water is less than 2:1, the mechanical seal may
en-US
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