8
EN
4. Plumbing Requirements and Precautions
• Please follow all plumbing instructions carefully. This product must be installed in accordance
with all national, state, provincial, and local plumbing codes. We recommend consulting with
your municipality or a qualified plumber if you have questions relating to plumbing codes for
your area prior to installing.
• The plumbing installation must be completed before the electrical installation.
• DO NOT solder any pipe with the unit connected to the pipe. The
heat from soldering may cause damage to the flow sensor. Doing so
will void the warranty.
• The plumbing installation requires piping that can withstand pressure
up to 8 BAR.
• The water supply flow rate must be at least 0.5 Gallons per Minute
(GPM) to ensure proper operation.
• Flexible braided, stainless steel water hoses are recommended to be
used with your water heater when installing your water heater. Do not
over-tighten the water inlet and outlet connections to avoid severe internal damage to the
water heater.
• All the water pipes within 3 feet (1 meter) of the inlet and outlet connections are recommended
to be rated for high-temperature applications with 150°F (66°C) minimum.
• Before proceeding to the electrical installation, run water through the unit for several minutes
to flush out any air bubbles from the water line.
5. Plumbing Installation
STEP 1:
Thoroughly flush cold supply line of debris.
STEP 2:
Connect the HOT WATER line to the water heater OUTLET. The water heater outlet can
be seen on the left side of the heater when facing the unit. Connect the COLD-WATER line to the
water heater marked COLD WATER INLET which is located on the right side when facing the unit.
* Pre-heated water can be connected to the cold water inlet, where this unit will act as a booster.
STEP 3:
After tightening both fittings at the water heater, several hot water faucets should be
opened to allow the flow of water through the water heater for at least 2 to 3 minutes. This process
purges all the air from the water lines and MUST be performed before turning on the power at the
unit.
FAILURE TO FOLLOW THIS STEP MIGHT CAUSE PERMANENT DAMAGE TO THE HEATING
ELEMENTS. (The power to the heater should be turned off and the air purged out of the lines
before turning the power on anytime maintenance is performed on the water heater or the homes
plumbing system, as air might have been introduced into the plumbing pipes.)
Fig. 7
Do not solder any
piping to the unit’s
Connection points
