Check Out Procedure And Adjustment - Dunkirk 90-50 Installation, Operation & Maintenance Manual

Verify proper sequence of operation
The sequence can be followed via the diagnostic indicator lamps on
the Honeywell S9301A integrated boiler control in Figure #16.
This is the normal sequence of operation. A more detailed sequence
of operation containing potential faults can be found in the service
hints section.
figure 16 - indicator lamps

CHeCk ouT proCedure and adjusTmenT

SEQUENCE OF OPERATION
"Power ON, boiler standing by. Lamp A is illuminated
indicating 2 Volt power is being supplied to the inte-
grated control."
Thermostat calls for heat, energizing system circulator
"Integrated boiler control goes through self check of
internal circuitry (1-2 seconds) and energizes draft
inducer"
"Draft inducer comes up to speed and establishes com-
bustion airflow, causing the normally open differential
pressure air proving switch contacts to close. Lamp B is
illuminated indicating that combustion airflow is proved
and the 15 second pre purge cycle"
"DIAGNOSTIC
INDICATOR
36
LAMPS"
A. 
B. 
C. 
D. 
E. 
A. 
B. 
C. 
D. 
E. 
A. 
B. 
C. 
D. 
E. 
A. 
B. 
C. 
D. 
E. 