Safety Interlocks (Limits); Gas Valve V1; Continuous Operation - Honeywell krom schroeder IFD 258 Manual

12 .9 Safety interlocks (Limits)

The limiters in the safety interlock (linking of all the rele-
vant safety control and switching equipment for the use
of the application, for example STB (safety temperature
limiter), Gas , Gas
min max
voltage supply.

12 .10 Gas valve V1

The start fuel flow rate is released by gas valve V1. The
gas valve V1 opens at the start of the safety time on
start-up t . It remains open until the burner is switched
SA
off again by a controlled shut-down or fault lock-out.

12 .11 Continuous operation

The gas burner has been running for longer than
24 hours and was not switched off during that time.
F
IFD 258 · Edition 03.12l
...) must isolate input 3 from the
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