Vacuum Test; Overheat Protection Manager (Opm); Butterfly Valve (Bfv) - Waterous CS Series Operation And Maintenance

1. Remove all caps except openings without valves.
Close all discharge, intake and drain valves and other
similar openings. Operate priming device to create a
vacuum of about 22 in. Hg/.735 atmosphere in pump,
then stop primer and engine.
Check the electrical circuit by pressing the test button
located on the panel plate every 100 hours of pump oper‐
ation or every six months, whichever comes first.
Operate valve once a week for optimal performance.
F-1031, Section 2115

Vacuum Test

Overheat Protection Manager (OPM)

Butterfly Valve (BFV)

2. Watch the pressure gauge; if vacuum drops more
than 10 in. Hg/.334 atmospheres in five (5) minutes,
listen for air leaks around the packing gland, gaskets,
valves, etc.
3. Replace gaskets, re-adjust packing, repack or other‐
wise repair source of trouble.
4. Repeat test.
If the light does not flash, the light bulb or flasher may
need replacement (provided all wire connections are
solid).
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