Watts Aerco Benchmark 5000 Reference Manual page 53

Benchmark with Edge [I] Controller: Reference Manual
SECTION 5: BENCHMARK 4000 & 5000N PART LIST
Valve Proving System (VPS)
One Benchmark 4000 gas train (22373-4) and one 5000N and gas train (22358-4) include the
Valve Proving System. This devise monitors the gas pressure on both sides of the Actuator. If
the pressure difference falls below a fixed value, indicating the failure of the Actuator or leakage
in the gas line, it triggers the shutdown of the unit. When this occurs, a SSOV SWITCH OPEN
message appears in the Edge Controller display.
Once the problem has been diagnosed and corrected, the Valve Proving device must be reset.
This is done by pressing the red RESET switch before the unit is restarted; the Edge Controller
must also be reset.
RED ALARM LIGHT & RESET SWITCH
•
OFF during normal operation
•
ON indicates a leak or Actuator failure
OMM-0146_A • GF-219 • 5/25/2020 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
YELLOW RUN LIGHT
•
OFF during normal operation
•
ON during valve proving operation
•
ON when the unit is in standby
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