Инструкции По Установке для Utica Boilers UB90-200

Draft inducer runs through 30 second post purge and 

switches OFF.

Circulator runs with thermostat on call for heat.

When temperature safety switch contacts connect 

before end of call for heat, control goes in normal 

light-off sequence.

If combustion airflow is lost while burner is firing 

(Differential air pressure switch contacts open) gas 

valve is de-energized. 

Draft inducer runs through 30 second post purge.

If call for heat remains, IBC waits 5 minutes for airflow 

to be re-established.

If airflow does not re-establish control lockout problem 

with combustion airflow. 

. 

Control automatically reset after 15 minutes.

If established flame signal is lost while control expects 

burner is operating, control immediately de-energizes 

gas valve. 

Draft inducer runs through 30 second post purge.

Control attempts to light boiler 3 times. If flame is not 

proven, control lockout problem establishing flame 

signal. 

. 

Control automatically resets after 1 hour.

If boiler water temperature reaches high 

limit setpoint, high limit n.c. contacts open 

immediately, closing gas valve. 

Draft inducer continues to run for 30 second post 

purge and switch OFF.

Circulator runs as long as thermostat calls for 

heat.

When high limit contacts connect before end of 

call for heat - control goes into normal light-off 

sequence.

If burner operates when boiler has no water, 

aluminum boiler sections heat up rapidly.

Casting temperature safety switch contacts will 

open, breaking 24 volt power to IBC. 

Power indicator light goes out. 

Requires manual reset to re-close contacts.

Circulator is energized as long as thermostat calls 

for heat during lockout.

Recovery from any lockout requires reset, which 

can be accomplished by:

(a) Removing and re-establishing thermostat’s        

 call for heat or turning service switch off   

 

and back on; 

or 

(b) Waiting for control to automatically reset after 

15 minutes for loss of combustion airflow or one 

hour for loss of flame.

If draft inducer temperature reaches temperature 

safety switch set-point, safety switch contacts open 

immediately, closing gas valve 

.