7
Recommended clearances: 12” (304.8mm) above and below the heater 6” (152.4mm) in front of
and to the sides of the heater
CAUTION: Keep any ammable materials at least 24” (609.6mm) away from the water heater
and hot water outlet pipe.
5. Plumbing Requirements and Precautions
• Follow all plumbing instructions carefully. This product must be installed in accordance with all
national, state, provincial, and local plumbing codes. Prior to installation, it is recommended
that you consult your municipality or a qualied plumber if you have questions relating to
plumbing codes for your area.
• 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 ow sensor. Doing so will void the warranty.
• The use of a temperature pressure relief valve (T&P) is not required for
most installations because the tankless water heater does not use a
storage tank. UL Standard 499 does not require the use of pressure
relief valve, although it may be needed to meet installation codes in
your area. In such cases, the pressure relief valve should be installed
in accordance with local codes. It is important to ensure that the unit
is operating correctly, and that air is purged from the valve prior to
installing the water heater.
• A T&P valve is recommended for added safety when connecting to
plumbing rated metal, ex or high-temperature CPVC piping.
NOTE: A pressure relief valve is required for installations in the Commonwealth of
Massachusetts and State of Kentucky. Check your local installation codes for any
special requirements.
• The plumbing installation requires piping that can withstand pressure up to 8 bar.
• The maximum operating water pressure for this unit is 10 bar (150 psi). Residential plumbing
systems with unstable pressure or pressure above 5 bar require the application of a pressure
reduction valve set to 4-5 bar for optimal performance.
• The water supply ow rate must be at least 0.5 gallons per minute (gpm) to ensure proper
operation.
• Flexible water hoses are recommended for use with your water heater. When connecting the
inlet water pipe to the unit, use a wrench to hold the unit’s connection, and another wrench
to tighten so that the ow sensor on the unit will not be loosened or damaged. Do not over-
tighten the water inlet and outlet connections to prevent severe internal damage to the water
heater.
Fig. 7
Do not solder any
piping to the unit’s
Connection points
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