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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
This water heater is supplied with ½" NPT fittings (3.5 kW) and ½" NPT fittings
(6.5 kW), DO NOT weld or use paste.
STEP 1: Thoroughly flush cold supply line of debris and connect the HOT WATER line to the
water heater 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 faucets 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 EL-
EMENTS. 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 the unit connected to pipes – heat from soldering may
damage the flow sensor. Doing so will void the warranty.
2. This automatic 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 Commonwealth of Massachu-
setts 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 (1035 kPa). 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 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 unit's connection, and another wrench to tighten, so
that the flow sensor on the unit will not be loosened or damaged. Serious internal
damage to the water heater can occur if the inlet or outlet connections are over
tightened or if solder connections were made.
5. We recommend that a manual shut-off valve (ball valve) is installed on the inlet and
outlet of the water heater so that there is a convenient shut-off point available in the
event that future maintenance or servicing is required. It is extremely important to
flush the lines to eliminate all plumbing paste or residue in the lines caused by any
welding or soldering before connecting pipes to the water heater.
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