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4- PLUMBING INSTALLATION
Please follow all plumbing instructions carefully. We recommend that this product be installed by a licensed
and qualified plumber in accordance with all applicable national, state, provincial, and local plumbing codes.
Installation Instructions
STEP 1:
C
onnect the HOT WATER line to the water heater marked HOT WATER OUTLET located on the left side of the
heater when facing unit. Connect the COLD WATER line to the water heater marked COLD WATER INLET on the right
side when facing unit.
STEP 2
:
After tightening both fittings at the water heater, open several hot water faucet s and allow water to
run though the water heater for at least 2 to 3 minutes. This process purges all the air from the water lines and
MUST be performed prior to turning on the power at the unit. FAILURE TO FOLLOW THIS STEP CAN CAUSE
PERMANENT DAMAGE TO THE HEATING ELEMENTS. If any maintenance is performed on the water heater or
the home’s plumbing system that may introduce air into the plumbing pipes, it is important to turn the power off
to the water heater and purge the air out of the lines before allowing the unit to power up.
STEP 3
:
Carefully inspect all connections, unions, and the pressure relief valve (if installed) for leaks.
IMPORTANT NOTES:
1.
Do not solder any pipes with unit connected to pipes – heat from soldering may damage the flow
sensor. Doing so will also void the warranty.
2. This Eemax tankless water heater is equipped with both computer-controlled and electro-mechanical auto
resetting thermostat switches for high-limited temperature protection. Since this product does not use a
storage tank, the use of a temperature pressure relief valve (T&P) is not required for most installations.
UL Standard 499 does NOT require that a pressure relief valve be used. However, a T&P valve may be
required to meet installation codes in your area. If one is required, 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. When connecting to Flex or High Temperature CPVC pipe, we
recommend that a T&P valve be used for added safety.
Please note: Installations in the Commonwealths of Massachusetts and State of Kentucky require a
pressure relief valve. Please check your local installation codes for any special requirements.
3. The maximum operating water pressure is 150 PSI. If the water pressure is higher, a pressure reducing
valve must be installed on the main incoming water supply line prior to installing the electric tankless
water heater.
4. Flexible water heater hoses can and are recommended to be used with your water heater as part of
the installation. When connecting the inlet water pipe to the unit, make sure to use a wrench to
hold the units connection, and another wrench to tighten, so the flow sensor on the unit is not
loosened or damaged. Serious internal damage to the water heater can occur if the inlet or
outlet connections are over tightened or if solder c onnections were made.
5. We recommend that a manual shut-off valve (ball valve) be installed on the inlet and outlet of the
water heater so there is a convenient shut-off point available in the event that future maintenance
or servicing is required. Before connecting pipes to the water heater, it is extremely important to
flush the lines to eliminate all plumbing paste or residue in the lines caused by any welding or soldering.
We recommend that all the water pipes or hoses within 3 feet of the inlet and outlet connections be rated for
high temperature applications with a 150°F minimum.
3
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