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Dry 101f <br />• <br />March 2, 2007 <br />PE <br />SYSTEM <br />The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058 <br />Telephone: 269-945.9501 Technical Services: 877-384-5464 Fax: 269-818-1680 Email: techsvcs@vikingcorp.com <br />4. Set the Dry Pipe S; stem <br />a. If an accelerator is used, reset by observing the air pressure gauge on top of the accelerator. The gauge must read <br />zero before the accelerator will automatically reset. (It may be necessary to loosen the air gauge to vent the trapped <br />air pressure in the upper chamber.) <br />b. Set Dry Pipe Valve - Open the test drain valve; remove hand -hole cover; wipe the valve seats clean; pull the clapper <br />down into the CLOSED position (hold while inserting wrench handle through hook -pawl assembly hole), slide wrench <br />handle through hole approximately 1 inch (25 mm). apply upward force on wrench and latch the dry valve clapper; <br />remove the wrench; fill the dry valve with water to the bottom of hand hole; replace hand -hole cover. <br />c Pressurize dry pipe system with air pressure as recommended: <br />Water Pressure psi <br />Max <br />50 <br />75 <br />100 <br />125 <br />150 <br />Air Pressure psi <br />Min <br />15 <br />20 <br />25 <br />30 <br />35 <br />Max <br />25 <br />30 <br />35 <br />45 <br />50 <br />d, When the accelerator air -pressure gauge reads the same as the dry pipe valve, open the supply water control valve, <br />slowly and secure all valves. <br />e. Close the diy pipe valve main drain valve slowly. <br />f. Perform semi-annual test. <br />g. Fire can damage piping and supports, so the system should be inspected by your local Viking representative. <br />Form No.F_011889 <br />Revisea page replaces page101.105 dated December 12, 1989 (�_ <br />(Revised format and renumbered page )3/ <br />