Installation Guide

18 • Electric Mini Tank Water Heater
Temperature Too High
If the water temperature is too hot:
• Install or adjust the Thermostatic Mix-
ing Valves for each point-of-use (see
manufacturer’s instructions), or
• Adjust the temperature by turning the
dial counter-clockwise.
A nonfunc oning thermostat or a shorted
hea ng element can cause extremely hot
water. If the Temperature and Pressure
Relief Valve (T&P Valve) releases large
amounts of very hot water, it is likely due
to a shorted hea ng element, or more
rarely a nonfunc oning thermostat.
Low Water Pressure
Check both the cold and hot water at a sink
to determine if the lower pressure is only on
the hot water side. If both hot and cold fau-
cets have low pressure, call your local water
u lity. If the low pressure is only on the hot
water side, the primary causes of this are:
• Partially closed supply valve. Open the
water heater’s supply valve fully.
Drips from T&P Relief
Valve Discharge Pipe
A small amount of water dripping from
the Temperature and Pressure (T&P) Relief
Valve usually means the home’s water
pressure is too high or you need a properly
sized and pressurized Thermal Expansion
Tank. Refer to Step 1 in the Installa on sec-
 on of this manual for more informa on.
A large amount of hot water coming from
the T&P discharge pipe may be due to the
tank overhea ng.
WARNING! Do not cap or plug the T&P
relief valve or discharge pipe, and do not
operate the water heater without a func-
 oning T&P Relief Valve - this could cause
an explosion.
Water pressure too high. High water pres-
sure can cause the T&P Relief Valve to drip.
Install a Pressure Reducing Valve (PRV) on
the main cold water supply line. Adjust the
PRV to between 50 and 60 psi.
Thermal Expansion Tank. Install a Thermal
Expansion Tank. If a Thermal Expansion
Tank is already installed and the T&P Relief
Valve discharge pipe drips, the Thermal
Expansion Tank may be pressurized to the
wrong pressure or the internal bladder
may be defec ve. Refer to the instruc ons
that came with the Thermal Expansion
Tank for more informa on.
Debris. In rare cases, debris can s ck inside
the T&P Relief Valve preven ng the valve
from sea ng fully. In that case, the T&P
Relief Valve discharge pipe will drip. You
may be able to clear debris from the T&P
Relief Valve by manually opera ng the
valve, allowing small quan  es of water to
fl ush out the debris. See the label on the
T&P Relief Valve for instruc ons.
If the water pressure is between 50 and 60
psi, a Thermal Expansion Tank is installed
and properly pressurized, and the valve has
been cleared of any debris, and it s ll drips,
the valve may be broken—have a qualifi ed
person replace the T&P relief valve.
Water Odor
Harmless bacteria normally present in tap
water can mul ply in water heaters and
give off a “ro en egg” smell. Although
elimina ng the bacteria that causes
“smelly water” with a Chlorina on system
the only sure treatment is increasing the
water temperature.
In cases where the “ro en egg” smell
is pronounced, you can raise the tank
temperature to “MAX” in order to reduce
bacteria growth in the tank.
WARNING! Because higher tempera-
tures increase the risk of scalding, if you
set the thermostat(s) higher than 120°F,
Thermosta c Mixing Valves at each point-
of-use are par cularly important (page
4).
NOTE: To protect the tank, an anode rod
must be installed in the water heater at all
 mes or the warranty is void.
TROUBLESHOOTING
TROUBLESHOOTING