Description

The valve test can only be performed for gaseous fuels:

If no valid valve test is available upon burner start, then the valve test is performed on burner start during the purge sequence.

If the pressure relief of the test segment of one fuel is to be performed via fuel valve 2, then the valve test after shut-down is permitted only together with post-purging.

Properties

Type

Selection parameter

[0] No leakage test

[1] Before ignition

The valve test is performed during the purge sequence before every burner start in gas firing operation mode.

[2] After shut-down

A valve test is performed after every fuel cutoff in gas firing operation mode.

[3] Before ignition and after shut-down

The valve test is performed before every burner start and after every fuel cutoff in gas firing operation mode.

See also

• Fuel type

• Post-purging

Reference

1072, 1073; 1021, 1022; 1352, 1353

DOC-719767713