Nelson 800 Series User Manual (English)

Other manuals for Nelson 800 Series

Questions and Answers:

Kim GomezAug 3, 2025

What to do if Nelson Control Unit valve will not open or has excessive pressure drop?

A
ashley02Aug 3, 2025
If the Nelson Control Unit valve doesn't open or shows a significant pressure drop when the manual selector valve is in the “OPEN” position, first, inspect all tube lines and fittings for any blockages or kinks. Also, ensure that the upstream pressure is sufficient. If the issue persists, the flow may be blocked by debris; in this case, remove the valve from the line and clean it thoroughly.

Nicole Watkins PhDAug 17, 2025

What to do if Nelson Control Unit valve will not close?

M
Michael PerezAug 17, 2025
If the Nelson Control Unit valve does not close when the manual selector valve is in the “CLOSE” position, begin by checking all tube lines and fittings for leaks. When removing control tube lines, apply opposing force as shown in the manual. Ensure water flows through the tube "U" connecting the upstream side of the main valve to the “CLOSE” port of the manual selector valve. A blocked filter or damaged sleeve may also be the cause; clean the filter or replace the sleeve accordingly.

Brand

Model

800 Series