Plumbing Requirements And Precautions - Craftsman CMXTEPA0018 Instruction Manual

36W
Fig. 3
Do not install upside down
Fig. 5
Recommended clearances: 12" (304.8mm) above and below the heater
6" (152.4mm) in front of and to the sides of the heater
WARNING: 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 120PSI / 8 BAR.
• The maximum operating water pressure for this unit is 150PSI / 10BAR. Residential plumbing systems with unstable pressure or
118 F
º
temp
Fig. 4
or on its side
Fig. 6
Fig. 7
Water Pre-
Filter
Do not solder any piping to the
unit's Connection points
7