Rinnai Tankless Water Heater Installation and Operation Manual
74
5.4 Setting the
Temperature
This water heater requires a minimum flow
rate to operate. This rate can be found on the
specification page in this manual. In some cases
when you are not getting hot water or if the water
alternates between hot and cold, it is due to the
water flow being below or close to the minimum
flow rate. Increasing the flow rate should resolve
these problems in these cases.
If you are experiencing issues with higher
temperature settings, then reduce the
temperature setting. Selecting 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 fixture.
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.
The “Priority” button enables a controller if
multiple controllers are being used. If the
“Priority” light is off, then press the “Priority”
button on the temperature controller. The
orange “Priority” light will glow indicating 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) buttons to
obtain the desired temperature setting.
All hot water sources are able to provide
water at this temperature setting until it is
changed again at this or another temperature
controller.
DANGER
•
While any hot water is being provided, the
temperature setting can only be adjusted
between 98°F and 110°F.
•
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 re
-
turn to the default setting of 104°F (40°C)
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
Figure 74
