Burnham IN12 Boiler User Manual


 
55
Table 7: Ignition Module Terminal Cross-Reference
Ignition Module
Terminal Designation
Wiring Ladder Diagram
Terminal Number
MV 1
MV/PV 2
PV 3
GND 4
24V (GND) 5
24V 6
SPARK 9
Figure 52: LED Locations
Yellow LED
Flash Code
a
Indicates
Recommended
Service Action
Heartbeat Normal Flame Signal N/A
2
Weak Flame Signal -
System will operate reliably but ame signal is
less than desired.
Note: This indication may ash temporarily
during or shortly after lightoff on some
applications.
Perform routine
maintenance to
assure optimum
ame signal.
1
Marginal Flame Signal (less than 1.1 µA) -
System may not operate reliably over time.
Service call recommended.
Note: This indication may ash temporarily
during or shortly after lightoff on some
applications.
Check gas supply,
pilot burner, ame
sense wiring,
contamination of
ame rod, burner
ground connection.
OFF
No Flame or Flame Signal -
below minimum threshold for system operation.
N/A
a
Flash Code Descriptions
- Heartbeat: Constant ½ second bright, ½ second dim cycles.
- The ash code number signies that the LED ashes X times at 2Hz, remains
off for two seconds, and then repeats sequence.
TABLE 8: Yellow LED Flame Codes