Azbil AUR450C - Intermittent Pilot Internal Block Diagrams

3-11
Chapter 3. OPERATION
 Internal block diagram
The internal block diagram below shows an example of wiring with external devices.
1413
1
10
12
11
24
23
K6
Flame output
K5
Alarm output
AUD300C/500C
(ame detector)
2
K6
K2
K2
K7
K3
K4
Shutter-driving
circuit
External reset
input circuit
8
9
Flame
amplifying
circuit
18
16
F
SR
G
Intermittent pilot valve 2
Ignition transformer
Intermittent pilot valve 1
21
22
20
19
External reset
input
*3
*3
AUR450C (for intermittent pilot burner)
Blue
Yellow
White
White
113X
Alarm relay
Pilot burner
for starting the
burner controller *2
7
K1
Input circuit
15
Burner start
contacts
Prepurge
end
Emergency
stop circuit
Blower on-o circuit
and prepurge circuit
Gas pressure upper
limit interlock
Gas pressure lower
limit interlock
(Interlock/
Limit contacts)
Vibration detection
limit
Overtemperature
limit
Air pressure lower
limit interlock
*1
113X
14
1
10
12
11
24
23
K6
Flame output
K5
Alarm output
AUD300C/500C
(ame detector)
2
K6
K2
K2
K7
K3
K4
Shutter-driving
circuit
External reset
input circuit
8
9
Flame
amplifying
circuit
F
G
22
20
19
External reset
input
AUR450C (for main burner)
Blue
Yellow
White
White
123X
Alarm relay
7
Main valve 2
K1
Main Burner start
contacts
123X
21
Main valve 1
Fuse
Fuse
High potential
side (H)
Low potential
side (G)
17
Power supply circuit
Fuse
13
18
16
R S
Input circuit
15
17
Power supply circuit
Fuse
Interlock
input circuit
Interlock
input circuit