Page 30 - Red-E Cabinet DV-5A Installer's Manual
P. 30

In order to prevent the possibility of a subsequent operation of an overheated solder type pilot sprinkler, any solder type pilot sprinklers that were possibly exposed to a temperature greater than their maximum rated ambient must be replaced.
Step 7. Operate (open) the Manual Control Station (8) and then open the Diaphragm Supply Valve (5). After unaerated water ceases to discharge from the Manual Control Station (8) drain tube, slowly close the operating lever by pushing it up. Do not close the hinged cover at this time.
Step 8. After allowing water to flow out of the Manual Reset Actuator (6) drain tube until aerated water ceases to discharge, reset the Manual Reset Actuator (6) by pressing the Reset Knob and hold until the pressure builds and reaches approximately 15 psi (1,0 bar) on the Diaphragm Gauge (15) and water stops flowing from its drain tube. Pressure will then build up in the DV-5A Diaphragm Chamber.
For Wet Pilot Actuation, 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.
Note: After relieving trapped air, check the Manual Reset Actuator (6) to make sure there is no water draining from its drain tube. If water is draining, reset the Manual Reset Actuator (6) as previously instructed.
Step 9. Verify the ability for the DV-5A Diaphragm to hold pressure as follows:
With the diaphragm chamber pressurized per Step 8, 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 10. 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.
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 the valve trim maximum pressure rating provided in the Technical Data section, the pressure is to be relieved to at least the valve trim pressure rating 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 11. 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 12. Fully open the System Main Control Valve (2).
Step 13. 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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