15
PN 240012960 REV. F [09/15/2020]
USER INTERFACE
The user interface integrated in the REC consists of the following devices:
• LCD Display
Shows programmed DHW set-point temperature T1 and fault codes. The display can be either degrees Fahrenheit
(display shows three digits) or Celsius (display shows two digits). The factory setting is Fahrenheit. See Dip Switch
section below (dip switch 4) to change display settings.
• Indicator LEDs
LEDs on either fixed or flashing, indicate various operations or fault
.
ON
- fixed green, 115 Vac power present, Fahrenheit Display
ON
- flashing green, 115 Vac power present, Celsius Display
DHW
- fixed yellow, domestic hot water request
DHW
- flashing yellow, dip switch 5 set incorrectly, see Dip Switch section below
FAULT
- flashing red, fault code
• DHW Temperature T1 Set Point Trimmer
This allows the temperature of the DHW fluid to be set in the range between 108-140 °F (42-60°C). Remove
the rubber plug near the upper right of the REC cover. Using a small screwdriver, rotate trimmer P1 clockwise to
increase T1 or counter-clockwise to decrease T1. The set point DHW temperature T1 is shown in the display. NOTE:
Trimmer P2 is not used and has no effect.
Fahrenheit Display
Celsius Display