Maintenance - Viking G-2000 Technical Data Manual

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3. Close the priming valve.
4. Open the flow test valve (located on the inlet of the dry valve).
5. 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 accelerator will indicate operation of the accelerator.
However, with the water supply main control valve CLOSED and the fow test valve OPEN, operation of the accelerator should
not trip the dry valve.
6. Low Air Alarm Test:
a. Verify that the water supply main control valve is closed and the flow test valve is open.
b. 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 operates.
7. Close the main drain valve.
8. Perform steps 1 through 15 of section 4.G - Placing the Valve in Service.
Trip Tests
Partial Flow Trip Tests are conducted with the water supply main control valve partially closed to minimize the amount of water enter-
ing the system during the test. Performance of a Partial Flow Trip Test is recommended during warm weather at least annually except
when a Full Flow Trip Test is conducted. Partial Flow Trip Tests may verify operation of equipment and devices but do not simulate
operation of the system in fire conditions.
Full Flow Trip Tests are conducted with the water supply main control valve fully open. The dry valve is operated by opening the system
test valve to simulate the opening of a sprinkler in fire conditions. When the dry valve operates, the sprinkler piping will be flooded
with water. Performance of a Full Flow Trip Test is recommended during warm weather at least once every three years. More frequent
testing may be required by the Authority Having Jurisdiction.
A. Full Flow Trip Test
1. Notify the Authority Having Jurisdiction and those in the area affected by the test.
2. Fully open the flow test valve (located on the base of the dry valve) to flush away any accumulation of foreign material.
3. Close the flow test valve.
4. Record water supply pressure and system air pressure.
5. Open the remote system test valve to simulate operation of the dry system. Record:
a. Elapsed time from opening of the test valve to operation of the dry valve. System pressure when the dry valve operated.
b. Elapsed time from opening of the test valve to development of full flow of water from the system test connection.
c. Any other information required by the Authority Having Jurisdiction.
6. Verify that alarms operate properly.
7. Allow water to flow from the system test connection until it appears clear and clean.
8. When test is complete, close the water supply main control valve.
9. Perform steps 1 through 15 of section 4.G - Placing the Valve in Service.
10. Verify that the water supply main control valve is open, and all other valves are in their normal operating position.
B. Partial Flow Trip Test
1. Notify the Authority Having Jurisdiction and those in the area affected by the test.
2. Record water supply pressure and system air pressure.
3. Fully open the flow test valve (located on the base of the dry valve) to flush away any accumulation of foreign material.
4. 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.
5. Open the main drain valve to simulate operation of the system.
6. Note (for records) water supply pressure and system air pressure when the dry valve operates.
7. CLOSE the water supply main control valve and OPEN the main drain IMMEDIATELY, when the test is complete.
8. Perform steps 1 through 15 of section 4.B - Placing the valve in Service.
9. Verify that the water supply main control valve is open, all other valves are in their normal operating position.
III. MAINTENANCE
1. Close the water supply main control valve, placing the system out of service.
2. Open the flow test valve located in the base of the dry valve.
3. Close the air (or nitrogen) supply to the dry system piping.
4. Close the priming valve.
5. Relieve all pressure from the dry system piping. If the system has operated, open main drain valve to allow the system to
drain completely.
6. Confirm that all three pressure gauges read zero.
A. removing the Cover from the Body
1. Remove the 2" grooved coupling from the top of the dry valve.
2. Remove the 10" section of pipe directly above the dry valve, if provided.
3. Open both of the 1/2" unions on the air supply line.
4. Remove the 3/4" union below the main drain, if provided.
Form No. F_011110 17.04.27 Rev 17.1
TECHNICAL DATA
The viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
2" MoDEL G-2000 Dry vALvE
rISEr ASSEMBLy
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