Page 41 - Red-E Cabinet DV-5A Installer's Manual
P. 41

Step 11. Verify the ability for the DV-5A Diaphragm to hold pressure as follows:
With the diaphragm chamber pressurized per Step 10, temporarily close the Diaphragm Supply Valve
(5), and then observe the Diaphragm Gauge (15) for a drop in pressure.
If a drop in pressure is noted, the DV-5A Diaphragm is to be replaced and/or any leaks must be corrected before proceeding to the next step.
If the Diaphragm Gauge (15) indicates no drop in pressure, re-open the Diaphragm Supply Valve (5) and proceed to the next step.
Step 12. Open the Supervisory Air Supply Valve (27) to re-establish supervisory system air pressure at nominally
10 psi (0,68 bar).
Step 13. Partially open the System Main Control Valve (2). Slowly close the Main Drain Valve (4) as soon as water discharges from the Main Drain Valve (4). Observe the Automatic Drain Valve (3) for leaks. If there are leaks, determine/correct the cause of the leakage problem before proceeding.OTICE
When the System Main Control Valve (2) is partially opened, the pressure on the DV-5A Diaphragm Chamber may increase. This increase in pressure is normal, and if the pressure is greater than 300 psi (20,7 bar), the pressure is to be relieved by partially and temporarily opening the Manual Control Station (8); however, do not allow the pressure as indicated on the Diaphragm Gauge (15) to drop below the supply pressure shown on the Water Supply Gauge (11), since this action may result in tripping of the DV-5A Valve.
Step 14. Close the hinged cover of the Manual Control Station (8) and insert a new break rod in the small hole through the top of the enclosing box.
Step 15. Fully open the System Main Control Valve (2).
Step 16. After setting a fire protection system, notify the proper authorities and advise those
responsible for monitoring proprietary and/or central station alarms.

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