How To Convert Unit Of Set Temperature - A.O. Smith Water Heater 520 Direct Vent Indoor Service Manual

12-13. How to convert unit of set temperature

This function offers a method for displaying the temperature in Celsius instead of Fahrenheit. On the
520 Indoor or 520 Outdoor, changing the unit of temperature can be done simply by using the No.1
dipswitch of Light bank of dipswitches. See section 12-5 for dipswitch settings.
Figure.1
520 Indoor or 520 Outdoor
Unit
˚F
100 105 110 115 120 125 135 140 145 150 155 160 165 170 175 185
˚C
38 40 43
NOTE: Changing the temperature display unit on the PCB does not change the unit of the remote
controller display. To convert between ˚C and ˚F displays on the remote controller , refer to the
remote controller's Installation Manual.
Temperature setting
45 50 52 57
520 Indoor / 520 Outdoor Service Manual
Right bank of dipswitches
Temperature setting on the computer board
60 63 65 68
76
CONFIDENTIAL
Ver. 1.00
3-digit 7-Seg LED
70 75 77 80 85