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201 – MINIMUM BURNER PAUSE TIME
An immediate restart of the burner after a normal shutdown is prevented by the
pause time. The pause time starts when the burner is switched off, after post-
combustion and post-purge has been deployed (if any).
Any start-up will be ignored until the minimum burner pause time has elapsed.
202 – AIR OUTPUT DURING SHUTDOWN
To suit different processes you can change the behavior of the air valve (or fan)
output during normal shutdown (
ϑ
1 or fieldbus command request).
It could be kept always closed, always open, controlled by means of P input at
terminal 15 or through fieldbus command.
301 – AIR RUN-UP TIME
This parameter defines a waiting time to compensate slow opening valves or the
initial starting phase of air blowers.
Air pressure switch must be open (air simulation test).
Prepurge starts once the air pressure is detected.
302 – AIR OUTPUT DURING PREPURGE
To suit different processes you can change the behavior of the air valve (or fan)
output during pre-purge (or waiting time).
Air output could be active or inactive.
303 – PREPURGE TIME
EN298 § 3.1
24
.1 -
§ 3.124.2
-
§ 3.124.3
-
§ 3.124.4
Set pre-purge time in forced draught burners according to applicable and relevant
standards (EN 676). During this time the flame simulation test is carried out.
The air output behavior during pre-purge is defined by parameter 302.
This is a merely waiting time if there is no air control.
401 – PRE-IGNITION TIME
EN298 § 3.135.3
The ignition transformer is turned on 500 ms before the pilot fuel valve to check
the correct operation before supplying the fuel.
This is a fixed time and can not be changed.
402 – FIRST SAFETY TIME
EN298 § 3.116
Set
the correct time following EN 746
-2 (or other relevant) requirements:
Natural draught burners
≤
35
0 kW → 10”
> 35
0 kW → 5”
IGNITION POWER
≤
33% NOMINAL POWER WI
TH MAXIMUM OF 350 KW
Forced draught burners
≤
7
0 kW → 5”
> 70kW
→
3”
IGNITION POWER ≤
10% NOMINAL POWER WI
TH MAXIMUM OF 350 KW
