Utica Boilers SW Series II 安装指导

• Thermostat will activate, completing circuit to limit 

control.

• Circulator motor starts and power is switched to 

limit.  If limit circuit is closed burner motor circuit is 

energized.

• Burner motor starts prepurge and approximately 15 

seconds after solenoid valve opens and ignition system 

is activated, ignition will begin.

• In event boiler water temperature exceeds high limit 

setting on boiler mounted limit control; Power will be 

interrupted between limit control and ignition system. 

Burner motor will continue to run in post purge mode 

for approximately 2 min. or until water temperature 

drops below high limit setting.  Circulator will continue 

to operate under this condition until thermostat is 

satisfi ed.

• When thermostat is satisfi ed power is interrupted to 

boiler mounted limit control and burner will run in post 

purge mode for 2 minutes.

Thermostat Installation

Install thermostat on inside wall about four feet above 

fl oor.

Never install thermostat on outside wall.

Do not install thermostat where it will be affected by:

A. Drafts
B.  Hot or cold pipes
C. Sun light
D. Lighting fi xtures
E. Television sets
F. A 

fi replace or chimney

Check thermostat operation by raising and lowering 

thermostat as required to start and stop burner.

Instructions for fi nal adjustment of thermostat 

are packaged with thermostat  (adjusting heating 

anticipator, calibration, ect.).

• Thermostat calls for heat.
• Circulator turns on.
• Limit checks boiler water temperature. Burner ignition 

delayed until limit determines call for heat cannot be met 

by residual heat in boiler and heat distribution system. 

See limit literature for additional information.

• Burner and circulator operation continues until 

thermostat stops call for heat.