Viking F-1 Manuel de service télécharger pdf (Page 6)

TECHNICAL DATA

March 28, 2013

Dry 120f

DRY VALVE

MODEL F-1

The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058

Telephone: 269-945-9501 Technical Services: 877-384-5464 Fax: 269-818-1680 Email: techsvcs@vikingcorp.com

2. 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.

3. If equipped with a Viking accelerator:

a. 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.

NOTE: STANDARD TOLERANCE ALLOWANCE IN PRESSURE GAUGE CALIBRATION MAY RESULT IN A SLIGHT VARIATION

WHEN PRESSURE READINGS FROM ANY TWO GAUGES ARE COMPARED. A DIFFERENCE IN PRESSURES OTHER THAN

SLIGHT VARIATION DUE TO GAUGE CALIBRATION TOLERANCE MAY INDICATE MAINTENANCE IS REQUIRED. REFER TO

TECHNICAL DATA FOR THE ACCELERATOR USED.

b. or dry systems with Viking Accelerators installed according to the Viking Model E-1 Accelerator Trim Chart, verify that the

½” (15 mm) anti-flood isolation valve is OPEN and secured.

4. Verify that the water supply main control valve is open and all trim valves are in their normal operating position.

5. Check for signs of mechanical damage and/or corrosive activity. If detected, perform maintenance as required or, if necessary,

replace the device.

6. Verify that dry valve and trim are adequately heated and protected from freezing and physical damage.

II. TESTS

Quarterly Tests

A. Water Flow Alarm Test

Quarterly testing of water ow alarms is recommended and may be required by the Authority Having Jurisdiction.

1. Notify the Authority Having Jurisdiction and those in the area affected by the test.

NOTE: VIKING CONVENTIONAL TRIM PROVIDES A CONNECTION FOR INSTALLATION OF A NON-INTERRUPTIBLE PRES-

SURE SWITCH. ALARMS AND/OR ELECTRIC PANELS CONTROLLED BY AN ALARM PRESSURE SWITCH INSTALLED IN

THAT CONNECTION CANNOT BE INTERRUPTED.

(See Dry Valve Trim Chart.)

2. Fully open the main drain (located on the base of the dry valve) to flush away any accumulation of foreign material.

3. Close the main drain.

4. 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.

a. Electric alarm pressure switches (if provided) should activate.

b. Electric local alarms should be audible.

c. The local water motor gong should be audible.

d. Verify that (if provided) remote station alarm signals were received.

5. When testing is complete, close the alarm test valve.

6. Verify:

a. All local alarms stop sounding and alarm panels (if provided) reset.

b. All remote station alarms reset.

c. All supply piping to water motor properly drains.

7. Verify that the alarm shut-off valve in the dry valve trim is OPEN, and the alarm test valve is CLOSED.

8. 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.

9. Notify the Authority Having Jurisdiction and those in the affected area that testing is complete.

B. Main Drain Test

Quarterly performance of the Main Drain Test is recommended and may be required by Authorities Having Jurisdiction to verify

integrity of the water supply.

1. Notify the Authority Having Jurisdiction and those in the area affected by the test.

2. Record pressure reading from the water supply pressure gauge.

3. 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.

4. Verify that the dry pipe system is pressurized at or above the minimum pressure recommended in Table 3 for the water

supply pressure available.

5. Fully OPEN the main drain located on the base of the dry valve.

6. When a full flow is developed from the main drain, record the residual pressure from the water supply pressure gauge.

7. When the test is complete, SLOWLY CLOSE the main drain.

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Viking F-1 Manuel de service Page 6

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