Section 9 Gas Installation System Tests

901. General

1. Before putting the gas system into operation, verify, from the connection at the pressure regulator to the closed burner valves at the appliances, that the system has been correctly installed and sub- mit it, with shut-off valves open, to an air pressure test at three times the working pressure but not more than 150 mbar prior to charging the system with gas. The system is to be deemed sound if, after a period of 5 min (to allow for pressure equilibrium), the pressure remains constant ±5 mber during the following 5 min. An appropriate leak detection fluid may be used on connections to locate sources of leakage.

2. All connected appliances, including the function of the flame-supervision devices at the burners and pilot lights, are to be subjected to a burner-function test following the system-pressure test. A visu- al check for flame lift-off due to excessive pressure at individual burners is to be made; also for adequate flame height with all appliance burners in the system operating(this ensures adequate, not excessive, working pressure at each appliance).

3. Where a bubble-leak detector is permanently fitted in the system, it is to be securely mounted in the low-pressure side of the system and in the cylinder housing or cylinder locker. A pressure gauge is to be installed in the high-pressure side of the system.