25
20135737
GB
Installation
5.13 Table of times
Tab. J
5.13.1 Operations status indication
Tab. K
Key
Tab. L
Symbol
Description
Value (sec.)
t0
Standby: the burner is waiting for a heat request, the gas pressure switch closure, the air pressure
switch opening
-
t1
Standby time for an input signal: reaction time, control box remains in waiting mode for t1
2
t1l
Flame or flame simulation detected before demand for heat: the control box remains idle.
25
t2
Initialisation standby time: checking time following the main power start-up
4.5
t2l
Checks extraneous light or parasite flame during t2: waiting mode for t2l, then lockout: the motor
does not start
25
t2a
Check whether the air pressure switch has already been moved to the work position before the
required heat: the control box remains in stand-by status, a lockout follows if the air pressure switch
remains switched for the
T2a
time.
max 120
t3
Pre-purging time: the fan motor is running, then the gas valve is activated
40
t3l
Checks extraneous light or parasite flame during pre-purging: control box goes into lockout at the
end of t3l
1
t3a
Time for checking the switching of the air pressure switch in the operating position during the pre-
purging time: if the pressure switch does not change over within
t3a
there is a lockout.
max 15
t3r
A recycle attempt is made if there is an air pressure drop during the pre-purging stage: there is then
a lockout in the event of a second loss of air pressure between the 16th second and the 29th; is a
loss of pressure between the 30th second and the 40th, the control box goes immediately into lockout
mode.
-
ts
Safety time
3
t4i
Total spark ignition time
3
t4a
Air pressure drop checking time during the
ts
time and the normal operation:
the control box locks out immediately.
1
t4l
Reaction time to achieve safety deactivation due to flame loss
1
t5
Delay time between the 1st and 2nd stage: opening time of 2nd stage valve after opening of 1st
stage, depends on the opening time of the air damper servomotor
5 ÷ 25
-
Minimum time to reset the control box using remote reset
0.4
Minimum time to reset the control box using remote reset
0.8
tr
Re-cycles: max. 3 repeats of the complete start-up sequence in the case of flame loss during opera-
tion; the final action at the last attempt following flame failure is a lockout
3
re-cycles
Status
Reset button
colour
Seconds
Colour code
Awaiting heat demand, awaiting
gas pressure switch clo-
sure,
awaiting air pressure switch opening
-
-
-
-
Awaiting heat demand with continuous purging
ORANGE
Blink
0.5
2.5
Pre-purging, or awaiting air pressure switch closure, or
long pre-purging
ORANGE
Blink
0.5
0.5
Safety time without flame
GREEN
Blink
0.5
0.5
Safety time with flame
GREEN
-
-
Normal operating position
GREEN
-
-
ON
OFF
Colour code
RED
ORANGE
GREEN
