Check Out Procedure And Adjustment; Verify Proper Sequence Of Operation - UTICA BOILERS UB90-50 Installation Manual

Figure 16 - Indicator Lamps
A. Verify Proper Sequence Of
Operation
The sequence can be followed via the
diagnostic indicator lamps on the Hon-
eywell S9301A integrated boiler control
in Figure #16. This is the normal
sequence of operation. A more detailed
sequence of operation containing po-
tential faults can be found in the service
hints section.

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"
42
"DiaGNostic
iNDicator
laMPs"
A. 
B. 
C. 
D. 
E. 
A. 
B. 
C. 
D. 
E. 
A. 
B. 
C. 
D. 
E. 
A. 
B. 
C. 
D. 
E. 