Installation Sheet

Rinnai Tankless Water Heater Installaon and Operaon Manual 59
While any hot water is being provided, the temperature seng can only be adjusted between 98° F
and 110° F.
NOTICE
Check local codes for the maximum water temperature seng allowed when used in nursing homes,
schools, day care centers, and all other public applicaons.
NOTICE
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 seng of 104° F (40° C) if power is interrupted.
NOTICE
There may be a variaon between the temperature displayed on the temperature controller and the
temperature at the tap due to weather condions or the length of pipe to the water heater.
NOTICE
DANGER
Water temperatures over 125° F (52° C) can cause severe burns or scalding
resulng in death.
Hot water can cause rst degree burns with exposure for as lile 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.
This water heater requires a minimum ow rate to operate. This rate can be found on the specicaon page in this
manual. In some cases when you are not geng hot water or if the water alternates between hot and cold, it is due to
the water ow being below or close to the minimum ow rate. Increasing the ow rate should resolve these problems
in these cases.
If you are experiencing issues with higher temperature sengs, then reduce the temperature seng. Selecng a
temperature closer to that which is actually used at the faucet will increase the amount of hot water being delivered to
the faucet, due to less cold water mixing at the xture.
4.3 Seng the Temperature
1. If the water heater is o, press the “On/O” buon to turn on.
2. The “Priority” buon enables a controller if mulple controllers are being
used. If the “Priority” light is o, then press the “Priority” buon on the
temperature controller. The orange “Priority” light will glow indicang that
this controller is controlling the temperature and that the water heater is
ready to supply hot water. The priority can only be changed while no hot
water is running.
3. Press the (Up) or (Down) buons to obtain the desired
temperature seng.
All hot water sources are able to provide water at this temperature seng
unl it is changed again at this or another temperature controller.
The controller buons 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 buons.