Dunkirk XEB II Series, Installation, Operation & Maintenance Manual

32

APPENDIX A - CONTROL MODULE

A.1 Installation Environment Considerations

 WARNING

If you do not follow these instructions 

exactly, a 

fi

 re or explosion may result 

causing property damage, personal injury 

or loss of life.

• Do not use this appliance if any part has 

been under water.

 Immediately call a quali

fi

 ed 

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.

!

• Install plastic cover. Limits contamination from 

accumulation of dust or grease.

• Controls can be damaged by excessively high 

temperatures.  Verify adequate air circulation around 

louvers is maintained when installing boiler.

A.2 Electrical Connections
Connect Module Connectors  Figure 11, Page 21 

• 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. 

A.3 Adjusting Settings

To discourage unauthorized changing of settings, procedure 

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

(see Figure 1) simultaneously for three seconds. Press and 

release I button until parameter requiring adjustment is 
displayed:

о

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

between 130 and 220 °F)

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.

A.4 Display

In RUN mode, status items and parameters are viewable. 

Example

, to display setpoint, control 

fl

 ashs “sp” (setpoint) 

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

fi

 nd 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  Figure 17 .

Figure 17      - Display Readout