3066
13
GB
4.7
OPERATING PROGRAMME
4.7.1 NORMAL OPERATION
D7888
KEY TO LAY-OUT
F
– Flame detector
I
– Ignition transformer
LED
– Reset button LED indicating operating
status
MV
– Fan motor
TL
– Limit thermostat
V1
– Oil valve 1
st
stage
V2
– Oil valve 2
nd
stage
t1
Standby time pending an input signal to control box:
reaction time, control box takes no action for time
t1
.
t4I
Flame loss during operation:
oil valve drop maximum reaction time, lockout occurs
after 3 recycle attempts.
t1I
Extraneous light detected before demand for heat:
lockout occurs if light persists for time
t1l
.
t4i
Transformer ignition time:
total ignition time:
ts
+
t5i
.
t2
Standby time following a demand for heat:
control box takes no action for time
t2
.
t5
Delay time between the 1st and 2nd stage:
2
nd
stage valve opening time after the 1
st
stage valve
opening.
t2l
Extraneous light detected during standby time:
lockout occurs if light persists for time
t2l
.
t5i
Transformer post-ignition time:
additional ignition time following
ts
.
t3
Pre-purging time:
fan motor starts.
t6
Post-purging time: additional purging time when heat
demand limit thermostat
(TL)
opens.
t3I
Extraneous light detected during pre-purging:
immediate lockout.
t6I
Extraneous light detected during post-purging:
lockout occurs if light persists for time
t6l
.
ts
Safety time: lockout occurs if no flame is detected by
the end of time
ts.
t7
Long pre-purging time:
pre-purging time longer than
t3
.
OPERATING TIMES
Time is expressed in seconds
t1
max
1
t4I
max
1
t1I
max
30
t4i
-
8
t2
-
3
t5
-
8
t2l
max
30
t5i
-
3
t3
-
15
t6
max
360
t3I
max
1
t6I
max
30
ts
-
5
t7
-
120
Red
Green + Yellow slow flashing
Green + Yellow fast flashing
Green
Green + Yellow medium flashing
Red + yellow fast flashing
t
2
t
1
t
3
t
4i
t
s
t
5i
t
4l
TL
MV
I
V1
F
LED
F
LED
P
M
.
V2
t
5
D7877
No signal needs to be received
Green
Yellow
MV = stopped
Loss of flame during operation (Recycle max. 3 attempts)
Yellow
Green
Yellow
Yellow
Red
Lockout
Yellow
Green
