Utica Boilers MGB Series II/MGC Series 安装指导

23

been under water. Immediately call a qualified 

service technician to inspect appliance and to 

replace any part of control system and any gas 

control which has been under water.

• Do not allow water to drip on controls. Prevent 

condensation by allowing air circulation around 

module and gas control. 

• Do not use corrosive chemicals around or on 

module or gas control.

  

• Controls can be damaged by excessively high 

temperatures.  Verify adequate air circulation around 

control is maintained when installing boiler.

• Connect L1& L2 leads inside J-box using wire nuts. 

Secure J-box cover.

• Connect Circulator harness to circulator. Harness 

comes plugged into module with Molex

®

 plug.

• Connect thermostat connection to yellow wires 

marked TT using wire nuts.

• Ensure remaining Molex

®

 plug connectors have not 

worked loose during transit.

• Check sensing bulb is fully inserted in well and is not 

loose. 

To discourage unauthorized changing of settings, procedure 

to enter adjustment mode is required. 
To enter adjustment mode, press UP, DOWN, and I buttons 

simultaneously for three seconds. Press and release I 

button until parameter requiring adjustment is displayed. 

See Figure 12, page 16.

 

о “SP_”   Setpoint (180 °F default setting; adjustable 

between 130 and 220 °F). Note: on some models 

this is "HL" High Limit.

 

о “Df_”   Setpoint Differential (15 °F default setting; 

adjustable between 10 and 30 °F)

 

о “°F_”  Degrees Fahrenheit

Press UP or DOWN button until parameter has reached 

desired value. After 60 seconds without any button inputs, 

control automatically returns to READ mode.

In RUN mode, status items and parameters are viewable. 
Example, to display setpoint, control flashs “sp” (setpoint) 

followed by temperature (i.e., 135), followed by °F or °C.
To read settings, press and release I key to find parameter 

of interest. 
Example, press and release I until setpoint (sp) is 

displayed, followed by three-digit number, i.e., 190, 

followed by °F or °C. Press I button again will display (S1T) 

Sensor 1 Temperature followed by three-digit number and 

corresponding degree designator. 
See Display Readout.