DAYLIFF DQA Посібник з монтажу та експлуатації - Сторінка 13

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WARNING

5. MAINTENANCE

No routine maintenance is necessary, however, during prolonged shut down it

is advisable to run the pump for a few minutes every few weeks.

Locked Pump

Should the pump fail to start, switch to maximum setting. If the pump still does

not start, the manual restart knob can be used to free locked pump. Once the

pump is running the regulator should be reset to its original position.

6. TROUBLE SHOOTING

PROBLEM

Pump fails to start

Pump start but provides

incorrect circulation

Noise

Speed regulator adjustment should only be made with

electrical supply switched off.

Very high speed setting may result in over pumping or the

pump drawing in air.

Do not use pump isolating valves for performance control.

SOLUTION

Check power supply fuses

Check voltage at pump terminals

Check electrial connection wiring procedure

Check if rotor is free to rotate

Check if pump valves are open

Check if pump case and system is adequately vented

Ensure correct electrical settings

Check electrical setting and adjust as required

Noise due to cavitation can be subdued by increasing the system

pressure within the permissible limits

Pump may require 48 hours to attain normal quiet operation