STERWINS 900WT24-4 Assemby - Use - Maintenance Manual page 211

8. MAINTENANCE
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8.1 CLEANING
1. Disconnect the pump
2. Unscrew the discharge connection
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3. Clean the discharge part of the pump with clean water
Check the integrity of the electrical cable.
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Illustration 5.3 and 5.4
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8.2 MAINTAIN
• Have your product serviced by a quali ed repair person using only identical replacement parts.
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This will ensure that the safety of the product is maintained.
• Have the product checked by a quali ed professional and
repaired, if necessary, before you use it again.
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Regular checks
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Check monthly the tank pressure using a manometer (not provided).
around 1.8 bar. Water under pressure causes the membrane to expand in such a manner that pressure in
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the air compartment increases until it reaches the stopping pressure. If the air pressure is too low, raise it
tank, never exceed the pressure of 1.8 bar.
Before checking the tank pressure, make sure that all the
discharge circuit valves are open in order to empty all the water
that is under pressure, and thus obtain an exact measurement
of the air pressure in the tank.
Changing the membrane
After performing the checks indicated in the Troubleshooting section, if the membrane needs to be
changed, proceed as follows: (it is strongly recommended to get some help from a specialist.)
• Unscrew the cover of the tank valve, then push the valve to release all air completely.
serious injury. Switch the product before adjusting,
inspecting, cleaning or storing the product.
Illustration 5.1
Illustration 5.2
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