Appliance details
2.10 Water connections 
When facing the heater, the ¾” cold water inlet is on the bottom right and the hot water outlet is on the bottom left. Install the heater where it’s centrally close to hot water use points if possible, and make hot water piping runs as short as possible.
INLET FILTER
SCREEN
lowest pressure range setting recommended is
Connecting the pressure relief valve (PRV)
A listed pressure relief valve supplied with the heater must be installed at the time of installation. No valve is to be placed between the PRV and the heater. No reducing coupling or other restriction may be installed in the discharge line. The discharge line must be a minimum of 4” above a drain and installed such that it allows complete drainage of both the PRV and the line. The location of the PRV must be readily accessible for servicing or replacement, and be mounted as close to the water heater as possible. See Fig. 16. To install the PRV, a suitable fitting connected to an extension on a “T” fitting can be sweated to the hot water line.
Support all piping.
COLD
HOT 
Fig. 15
B THE USE OF A UNION WHEN CONNECTING
BOTH WATER PIPES TO THE INLET AND
OUTLET CONNECTIONS IS RECOMMENDED,
THIS WILL FACILITATE ANY NECESSARY
SERVICING AND REQUIRED CLEANING OF
THE INLET WATER PARTICLE SCREEN.
Although water piping throughout your structure may be |
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other than copper, we recommend that copper piping | Fig. 16 Plumbing Connections and Pressure Relief |
or suitably rated stainless steel flex line piping be used | Valve |
for at least three feet before and after the heater (follow |
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local codes if more stringent). Never sweat any rigid |
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piping directly to or beneath the water connections, |
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damage can occur to the internal water valve from |
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heating of the pipe. Plastics or other PEX type plumbing |
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line materials are not suitable for connecting directly to |
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the water heater. Keep water inlet and outlet pipes to no |
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less than ¾" (19.05mm) diameter to allow the full flow |
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capacity. |
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It is recommended that all water piping below the |
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heater be properly insulated to avoid heat loss. If |
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below freezing temperatures are ever anticipated |
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where the heater is located, insulation material |
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is required and must be capable of protecting the |
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piping from freezing. The freeze protection that is |
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equipped within the heater will not prevent any |
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freeze damage to the exterior water piping. |
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If the cold and hot connections to the heater are |
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reversed, the heater will not function. Be certain there |
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are no loose particles or dirt in the piping. Blow out or |
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flush the lines before connecting to the water heater. |
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Full port valves should be installed on both the cold |
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water supply and hot water outlet lines to facilitate |
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servicing the heater (see Fig. 16). For installation on a |
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private well system with the use of a pressure tank, the |
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6 720 607 440 | 13 |
