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9 Appendix
CAUTION!
If the safety interlock chains run open in "Burner OFF" condition, the device doesn’t execute
an interlocking. If you need interlocking in "Burner OFF" condition you need to adopt appro-
priate measures on the plant.
9.16 Valve Leakage Test Venting Over the Roof
NOTICE
Check the diameter of the gaspipe when gas will be released above the roof.
Enable terminal no. 67 for 2 sec. to release the gas.
Ensure that this time is long enough, even for mostly used gaspipes with a smaller diameter
to release the gas.
Fig. 9-25 Suggested wiring for venting the gas line over the roof in conjunction with the ETAMATIC
An ETAMATIC is controlling 2 burners in parallel.
No. Description
1 ETAMATIC
2 230 V contacts safety interlock chain
3 optional unlocking switch
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