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24
Chapter 4. Explanation of Operation
•
Non-recycling oil-fired combustion (2-level combustion)
Terminal layout
of connector
for front wiring
*1 Use the external controller for either the power or for low voltage.
G
F
+
K3
L2(N)
NFB
Pre-purge completion signal
External controller *1
(for power supply)
External controller *1
(for low voltage)
L1
Fuel oil valve
Two-level fuel oil valve
K4
NC
NC
NC
Alarm output COM
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
Alarm output NO
Alarm output NC
Combustion
safety
control
circuit
Reset
switch
DISP
switch
Power
supply circuit
10A
AUR890/BC-R05A100
Flame
detector
Combustion
detection
circuit
AC input
circuit
K2
K1
K6
Ignition transformer
K5
Input
circuit
(24 Vdc)
24 Vdc
FLAME
ALARM
FV+
FV-
0 to 5 Vdc
Flame
voltage
circuit
1
3
5
7
8
2
11
12
9
10
6
4
19
20
23
24
21
22
18
35
25
26
27
13
15
14
16
17
Display
Burner on-off circuit
Limit / interlock circuit
Blower operation circuit / pre-purge circuit
Alarm
Содержание AUR890 Series
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