override

21:08 Dec 20, 2016 

@ viking modena: altrove nel testo del manuale si parla di bypass... e non mi sembra che qui ci si riferisca allo stesso elemento.

a volte accennano al manual override, intendendo il controllo manuale (da utilizzare quando quello automatico non funziona).

Metto qui un po' più di contesto (si riferisce ad una figura):

1. Referto Figure 2. Remove housing nuts (ltem 12) and split valve. Remove the lower housing (Item 2) taking care not to damage the elements. Remove and discard housing gasket (Item 9) ensuring any traces of the gasket are removed from the housing mating faces. Note that in some sizes of Model B Valves 'O' rings are used instead of gaskets.
2. If removing element from BO valve (non manual override)
simply pull the element from the upper housing. Goto step 9.
3. If removing element from BR valve (manual override) only dismantle one at a time to eliminate the chance of the manual override parts being mixed up.
4. Carefully remove the indicator pin (item 36).
5. Remove the locknut (Item 38) from the override stem (ltem
21).
6. Remove override housing retaining screws (Item 28).
7. Unscrew override housing from the override stem (ltem 21