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PN 240012960 REV. F [09/15/2020]
• Dip Switches
The dip switches are located on the control board inside the REC. The factory configuration is: switches 1-5 in the
OFF position and switch 6 in the ON position. Switch 4 toggles the display between Fahrenheit and Celsius. All other
switches must remain in their factory configuration.
To access the dip switches on the REC control board:
1. Turn off power supply to DHW module.
2. Remove cover from the REC. NOTE: the LCD display in the REC cover is connected to the REC control board with
a short cable. Be careful not to stretch or damage the cable.
• Dip Switch 1-2-3
These switches enable REC firmware and must be left in the factory configuration
.
Combination OFF-OFF-OFF (code 30) is the only firmware available in the REC.
At power up the REC, after the initial operations, shows the code -5 for 1 sec and the code 30 flashing for a few
seconds.
If a different dip switches combination is chosen, at power up the REC, after the initial operations, shows two
horizontal lines “- -“ flashing for few seconds and then the firmware fault code 79 with the fault led flashing.
• Dip Switch 4
Dip switch 4 enables the LCD temperature display to toggle between Fahrenheit (°F) and Celsius (°C). Dip switch 4
is factory set to the OFF position for Fahrenheit display. Set dip switch 4 to the ON position for Celsius display.
• Dip Switch 5 FUNCTION NOT USED IN THIS MODULE
Dip switch 5 enables a preheating function that is not applicable to this DHW module design. It will cause the pump
to run periodically when there's no DHW request, wasting energy and running the pump for no reason. When this
function is activated, the yellow LED flashes. If the yellow LED is flashing, restore dip switch 5 to the OFF position.
• Dip Switch 6 FUNCTION NOT USED IN THIS MODULE
Dip switch 6 sets the REC to receive the DHW flow signal from either a flow turbine (ON) or flow detector (OFF). Dip
switch 6 must be left in the factory configuration (ON) because this DHW module uses a flow turbine. If dip switch 6
is OFF, the DHW module will not recognize a DHW request and will not work.
POWER CODE
FIRMWARE CODE