Oilon GKP-50 MH, Operation And Maintenance Manual

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Gas shut-off valves
If the burner is equipped with an automatic valve proving system the valves are tested
to be leak free during each start-up sequence.
To prove the valves manually:
1. Install a pressure gauge between the fuel shut-off valves. Refer to the valve
manufacturer’s instructions for the exact location of the measuring port.
2. Start the burner. Wait until the start-up sequence is finished.
3. Rotate the dial on the gas minimum pressure switch towards the maximum value.
Wait for the burner to shut down.
4. After the burner has shut down observe the reading on the pressure gauge for a
few minutes. The indicated pressure must not lower during that time.
Gas shut-off valves
To manually test the tightness of a single valve gas train please follow this procedure.
Prerequisites for the test: fuel gas is available, gauge for measuring gas pressure, a
length of flexible tube (ID 1/8”) and a flat head screwdriver
Test method
1. Open the test nipple located on the side of the gas low pressure switch
2. Attach the other end of the tube to the nipple and the gauge to the other end
3. Open the manual gas shutoff valve and notice a pressure rise on the gauge
4. Close the manual shutoff valve and disconnect the gas line form the manual valve
5. Observe the gauge for a period of time that no pressure drop occurs
6. If a pressure drop occurs either the manual or automatic valve is leaking and must
be replaced
7. Remove testing equipment and close the test nipple
Oil shut-off valves
Read the instructions carefully before starting the oil shut-off valve leak
testing.
Check the following before the test:
● Prevent formation of ignition spark by detaching the ignition transformer secondary
wires.
● Block the oil line to prevent oil entry to nozzles.
Make sure that you have all needed equipment: tools for opening the oil line
connectors, drainage container, and detachable conductor or switch with conductors.
After the test, disassemble all test arrangements carefully and return the burner to its
original state.
Main valve leak testing
84 (95) M5164 1640EN