DRY-PIPE PROCEDURES Part 3

III. SYSTEM SHUTDOWN & STARTUP:


A. Shutdown


A. Close main control valve.

B. Silences tamper alarm.

C. Open main drain.

D. Shut off air compressor supply.

E. Open all auxiliary drains to expel air and water from system piping.

F. Startup:

1. Remove faceplate.

2. Ensure that valve clapper is closed and properly seated.

3. Replace valve face.

4. Close all auxiliary valves and low point drains-main drain should remain open.

5. Prime system through priming cup. Final water level is adjusted through the priming level valve.

6. Restore air pressure in system.

7. Ensure that compressor supply valves are open to the system.

8. Slightly open main control valve. All movements of the control valves should be made slowly to avoid water hammer. Water will begin to flow into system and out through the open 2” main drain.

9. Very slowly close the 2” main drain to avoid water hammer-until completely closed.

10. Open main control valve to its full open position.

11. Verify stabilization of water and air pressure.

12. Reset tamper switches.

13. Open alarm control valve.



The above information is provided as a courtesy and is not intended to replace the outlined procedures as given in NFPA 24. It is the owner’s responsibility to follow the outlined procedures in NFPA 24.


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