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3. All air must be purged from the line
before starting the heater. After mak-
ing the plumbing connections, open
at least three hot water faucets and
allow them to run for at least three
minutes WITHOUT THE POWER ON.
4. While running the water to purge
the air, carefully inspect all connec-
tions, unions, and the pressure relief
valve (if installed) for leaks.
SAFETY PRECAUTIONS - PLUMBING
•
All plumbing work must comply with
national and applicable state and local
plumbing codes. A pressure-reducing
valve must be installed if the cold-water
supply pressure exceeds 150 psi. Make
certain that the cold-water supply line
has been flushed to remove any scale
and dirt.
•
Do not solder any pipes connected to the
product. The heat may damage the flow
sensor. Doing so will void the warranty.
•
UL Standard 499 does NOT require that
a pressure relief valve be used. However,
a T&P valve may be required to meet in-
stallation codes in your area. If one is re-
quired, install the pressure relief valve in
accordance with local codes and ensure
that it operates correctly, and that air is
purged from the valve prior to installing
the water heater.
DAMAGE WARNING
Step 3 is mandatory. DO NOT SKIP!
Failure to follow can cause perma-
nent damage to the heating elements,
which is not covered by the warranty.
If any maintenance is performed on
the water heater or the home's plumb-
ing system that may introduce air into
the plumbing pipes, YOU MUST turn the
power off to the water heater and purge
the air out of the lines before allowing
the product to power up.
If any leaks are detected in step 4, im-
mediately turn off water to the product
and contact Optimal° support.
386-OPTIMAL (386-678-4625)
itsoptimal.com
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