Control Station drain tubing. Close the
hinged cover and insert a new break
rod in the small hole through the top of
the enclosing box.
Crack open the Inspector’s Test Connection
and any other vent valves on
the wet pilot line to relieve trapped air.
After the discharge of air has stopped,
close the vent valves and the Inspector’s
Test Connection.
Step 9. Inspect the drain connection
from the Manual Control Station. Any
leaks must be corrected before proceeding
to the next step.
Step 10. Verify the ability for the DV-5
Diaphragm to hold pressure as follows:
With the diaphragm chamber pressurized
per Step 8, temporarily close the
Diaphragm Chamber Supply Control
Valve, and monitor the Diaphragm
Chamber Pressure Gauge for a drop in
pressure.
If a drop in pressure is noted, the DV-5
Diaphragm is to be replaced and/or
any leaks must be corrected before
proceeding to the next step.
If the Diaphragm Chamber Pressure
Gauge does not indicate a drop in
pressure, re-open the Diaphragm
Chamber Supply Control Valve and
proceed to the next step.
Step 11. Slowly open the Main Control
Valve. Close the Main Drain Valve as
soon as water discharges from the
drain connection. Observe the Automatic
Drain Valve for leaks. If there are
leaks, determine/correct the cause of
the leakage problem. If there are no
leaks, the DV-5 Valve is ready to be
placed in service and the Main Control
Valve must then be fully opened.
NOTES
When the Main Control Valve is