SIAD ESA Pyronics ESTRO-PO E7014P - Page 24

ESA ESTRO - E7014P rev. 02 - 03/05/17
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24
In
the following table the maximum allowed time limits
have been indicated. Refer to the specific application
norm to establish the correct applicable parameter at
installation, choosing according to the burner type and
power, values that do not compromise its safety.
APPLICATION NORM
IGNITION SAFTEY
TIMES
REACTION
TIME
NOTES
Gas burners
EN298
Refer to the
application norm
Maximum 1 s
Recycle and reignition
allowed.
EN676
Depend on burner type
and power
maximum 5 s
Maximum 1 s
Depending on the applica-
tion, only one recycle
attempt is allowed.
“Prepurge” mode is speci-
fied by the norm.
EN746-2
Depend on burner
type and power
maximum 10 s
Depends on
the application
maximum 2 s
Depending on the applica-
tion, one recycle attempt is
allowed at flame signal
loss, two recycle attempts
at failed ignition and high
temperature functioning.
“Prepurge” mode is speci-
fied by the norm.
Oil burners
EN298
Refer to the
application norm
and to EN267
Maximum 1 s
Depending on the applica-
tion, recycle and allowed
reignition.“Prepurge” mode
is specified by the norm.
EN746-2
Depend on burner
type and power
maximum 10 s
Depends on the
application
maximum 2 s
Depending on the applica-
tion, one recycle attempt is
allowed at flame signal
loss, two recycle attempts
at failed ignition and high
temperature functioning.
“Prepurge” mode is speci-
fied by the norm.
If values not allowed by the EN298 but only by the EN746-
2 are set, only the reference norm for which ESTRO is
applicable is indicated on the label of the instrument.