Utica Boilers MGB Series II/MGC Series 安装指导

27

has 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.

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

Secure J-box cover.

• Circulator harness to circulator. Harness comes 

plugged into module with Molex

®

 plug.

• 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. 

• Refer to enclosed addendum for wiring 

instructions when using indirect hot water 

heater.

To discourage unauthorized changing of settings, pro-

cedure 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; ad-

justable between 130 and 220 °F) Note: on 

some models this is “HL” High Limit.

 

о “Df_”   Setpoint Differential (15 °F default set-

ting; 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.