Plumbing Requirements And Precautions - Black & Decker BD-29-DWH Manual

Recommended clearances: 12" (304.8mm) above and below the heater
6" (152.4mm) in front of and to the sides of the heater
CAUTION: Please keep any flammable materials at least 24" (609.6mm) away from the water
heater and hot water outlet pipe.

5. 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 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 that a pressure relief
valve is used, 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,
Flex or High-Temperature CPVC piping.
NOTE: A pressure relief valve is required for installations in the Commonwealth of
Massachusetts and State of Kentucky. Please 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 150PSI / 10BAR. 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 flow rate must be at least 0.5 Gallons per Minute (GPM) to ensure proper
operation.
• Flexible water hoses are recommended to be used with your water heater when installing
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 flow sensor on the unit will not
be loosened or damaged. Do not over-tighten the water inlet and outlet connections to avoid
severe internal damage to the water heater.
Do not solder any
piping to the unit's
Connection points
Fig. 7
7