Page 34 - Red-E Cabinet DV-5A Installer's Manual
P. 34

Step 1. Close the System Main Control Valve (4). Step 2. Close the Diaphragm Supply Valve (5).
Step 3. Open the Main Drain Valve (4) and System Drain Valve (23). Close the System Drain Valve (23) after water ceases to discharge. Leave the Main Drain Valve (4) open.
At this time make certain that the Pressure Gauge Valves and the Alarm Control Valve (OP1), as applicable, are open.
Step 4. Depress the plunger of the Automatic Drain Valve (3) to verify that it is open.
Step 5. Clean the Diaphragm Supply Strainer (13) by removing the clean-out plug and strainer basket. The Dia-
phragm Supply Strainer (13) may be flushed out by momentarily opening the Diaphragm Supply Valve (5).
Step 6. Reset the electric detection system in accordance with the manufacturer’s instructions to de-energize the solenoid valve.
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. Inspect drain connections from the Manual Control Station and Solenoid Valve. Before proceeding to the next step, correct any leaks.
Step 9. Verify the ability for the DV-5A Diaphragm to hold pressure as follows:
With the diaphragm chamber pressurized per Step 7, 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 pro- ceed to the next step.
Step 10. Partially open the System Main Control Valve (4). 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 (4) 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 Valve (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 (4).
Step 13. After setting a fire protection system, notify the proper authorities and advise those responsible for
monitoring proprietary and/or central station alarms.
Adjusting Pilot Valve Pressure
A minimum flow of 100 gpm (380 lpm) is required to adjust the Pilot Valve’s pressure.

   32   33   34   35   36