Title Page
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Site conducted
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Conducted on
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Prepared by
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Location
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Work Order Number
Untitled Page
(T)ools, (S)afety Equipment and (M)aterials
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Mechanic's toolset
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Flashlight
Safety Guidelines
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Schedule work with operating personnel
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Check with operating personnel for deficiencies
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Follow site safety rules and your supervisor's instructions
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Obtain and review manufacturer's instructions
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Report any problems you find
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Record the results in the equipment history log
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Verify proper signal at FACP
Maintenance Procedures
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Check pressure gauges located on the supply side and system side of the dry valve. Verify that the proper ratio of air pressure to water supply pressure is being maintained
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Verify that the intermediate chamber of the dry valve is free of water. No water should flow from the drip check when the plunger is pushed
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Verify that there is no air coming out of the 1/2” outlet of the PORV
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If equipped with a Viking accelerator: Check the air pressure gauge located on the top of the accelerator. Air pressure in the upper chamber of the accelerator should equal the pneumatic pressure maintained in the system
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Check for signs of mechanical damage and/or corrosive activity. If detected, perform maintenance as required or, if necessary, replace the device
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Verify that the dry valve and trim are adequately heated and protected from freezing and physical damage
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Confirm that all valves are in their normal operating positions
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Perform a water flow alarm test
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Notify the authority having jurisdiction and those in the area affected by the test
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To test the local electric alarm (if provided) and/or mechanical water motor gong (if provided); OPEN the alarm test valve in the dry valve trim. The electric alarm pressure switches should activate. Electric local alarms should be audible. The local
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When testing is complete, close the alarm test valve
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Verify that all local alarms stop sounding, and alarm panels (if provided) reset. Verify that all remote station alarms reset. Verify that all supply piping to water motor properly drain
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Verify that the alarm test valve is CLOSED
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Verify that the intermediate chamber of the dry valve is free of water. No water should flow from the drip check when the plunger is pushed.
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Perform a main drain test
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Notify the authority having jurisdiction and those in the area affected by the test
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Record the pressure reading from the water supply pressure gauge
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Verify that the intermediate chamber of the dry valve is free of water. No water should flow from the drip check when the plunger is pushed.
FIRE-SUPRS-SYS
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Verify that there is no air coming out of the 1/2” outlet of the PORV
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Verify that the dry pipe system is pressurized at or above the minimum pressure recommended in Table 2 for the water supply pressure available.
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Fully OPEN the main drain valve located on the base of the dry valve
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When a full flow develops from the main drain, record the residual pressure from the water supply pressure gauge
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When the test is complete, SLOWLY CLOSE the main drain
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Compare the test results with previous flow information. If deterioration of the water supply is detected, take appropriate steps to restore adequate water supply
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Verify that normal water supply pressure and system pneumatic pressure have been restored, and that all alarm devices and valves are secured in normal operating position.
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Perform a low air alarm test
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Close the water supply main control valve supplying the dry valve.
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Close the priming valve
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Open the flow test valve (located on the inlet of the dry valve)
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If the dry valve being tested is equipped with a Viking Model E-1 Accelerator, performing step 6 of this test will cause the accelerator to operate. A burst of air from the vent in the bottom of the<br>accelerator will indicate operation of the accelerator.
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Verify that the water supply main control valve is closed, and the flow test valve is open. Gradually open the main drain valve on top of the dry valve to simulate operation of the dry system. Observe and record the pressure at which the low air alarm op
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Close the main drain valve.
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Perform a partial flow trip test.
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Close the water supply main control valve supplying the dry valve
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Record the water supply pressure and the system air pressure
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Fully open the flow test valve (located on the base of the dry valve) to flush away any accumulation of foreign material
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CLOSE the water supply main control valve as far as possible while maintaining full flow from the flow test valve. CLOSE the flow test valve
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Open the main drain valve to simulate operation of the system
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Note (for records) water supply pressure and system air pressure when the dry valve operates
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CLOSE the water supply main control valve, and OPEN the main drain IMMEDIATELY when test is complete.
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Place the valve in service in accordance with the manufacturer's instructions
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Wipe down the unit
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Verify that the water supply main control valve is open, and all other valves are in their normal operating position
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Record and/or provide notification of test results
Maintenance Hours
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Time spent on work order?
