Installation Guide

Rinnai Tankless Water Heater Installation and Operation Manual 61
Certain elements of the installation may require adjusting the parameters of the tankless water
heater.
To adjust the parameters:
1. Locate the PC Board (lower front of unit).
2. Locate the two push buttons (A and B) on the PC Board.
3. Press the “A” button for 1 second. The controller displays 01A or 01b (Figure 64).
A
………B
4. Use the up and down arrow buttons on the controller to
select a setting number (see Parameter Settings Table on
next page).
5. Once the desired setting number
is selected, use the “On/Off”
button on the controller to
change the selection for the
setting number.
Example: Display will change
from 01A to 01b for Maximum
Temperature setting (as shown
in the images).
6. To exit and save changes, press the
“A” button for 1 second.
WARNING
DO NOT adjust parameter settings unless specifically instructed to do so.
01 A
01 b
Figure 68
Figure 67
Figure 69
01 A