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A�1 Installation Environment Considerations
!
WARNING
If you do not follow these instructions
exactly, a fire 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 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.
• 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 L1, L2 and ground leads connect inside J box
using wire nuts. Secure J box cover. (J box located
on right side panel.)
• Connect Circulator harness to circulator. Harness
comes plugged into module with Molex
• Connect thermostat connection to yellow wires
marked T-T using wire nuts.
• Ensure remaining Molex
worked loose during transit.
• Check sensing bulb is fully inserted in well and is not
loose.
• Verify pressure switch connection is made.
APPENDIX A - CONTROL MODULE
plug.
®
plug connectors have not
®
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
simultaneously for three seconds. Press and release I
button until parameter requiring adjustment is displayed.
See Figures A-1 & A-2.
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). Note: on some
models this is "HdF" High Limit�
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.
See Figure A-3.
Example, to display setpoint, control flashes "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.
Figure A-1 - Display
34
Up & Down Buttons
"I" Button
Display
PN 240013099 Rev. B [08/08/2023]
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