Installation Guide

Rinnai Tankless Water Heater Installation and Operation Manual 71
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.
DANGER
IMPORTANT
•
While any hot water is being provided,
the temperature setting can only be
adjusted between 98°F and 110°F
(37°C and 43°C).
•
Check local codes for the maximum
water temperature setting allowed when
used in nursing homes, schools, day
care centers, 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 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.
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
“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 arrow buttons to obtain
the desired temperature setting (Figure 76).
All hot water sources are able to provide
water at this temperature setting until it is
changed again at this or another temperature
controller.
Figure 76