Figure 40
46
Rinnai Tankless Water Heater Installation and Operation Manual
5.4 Setting the
Temperature
Water temperatures over 125°F (52°C) can cause
severe burns or scalding resulting in death.
Hot water can cause first degree burns with
exposure for as little as:
•
3 seconds at 140°F (60°C)
•
20 seconds at 130°F (54°C)
•
8 minutes at 120°F (49°C)
Children, disabled, or elderly are at highest risk of
being scalded.
Feel water before bathing or showering.
The controller buttons shown below are located on
the outside front panel for internal (indoor) water
heaters.
For external (outdoor) water heaters, open the
front panel to access the controller buttons.
1. If the water heater is off, press the “On/Off”
button to turn on.
2. If multiple controllers are installed the "Priority"
button, when selected, will enable that
controller to function. Note: Priority can only
be changed when hot water is not in use.
3. Press the
(Up) or
(Down) buttons to
obtain the desired temperature setting.
DANGER
•
Check local codes for the maximum water
temperature setting allowed when used in
nursing homes, schools, day care cen
-
ters, and all other public
applications.
•
If a newly installed water heater with a
controller has not been powered for at
least 6 hours then the temperature will
return to the default setting of if power is
interrupted.
•
There may be a variation between the
temperature displayed on the
temperature controller and the
temperature at the tap due to weather
conditions or the length of pipe to the
water heater.
IMPORTANT
