EZ Plate™ Storage Water Heater
8
PV500-64 12/14
Typical EZ Plate™ Storage Piping Arrangement
4.4 Boiler Water Piping
WARNING: All system piping to the heat exchanger plumbing must be adequately supported. Failure to
provide adequate support will result in excessive loads on the heat exchanger connections that can cause
hot water discharge resulting in property damage, scalding and personal injury or death.
1. All boiler and domestic water pipes should be flushed before assembly and installation. Failure to flush lines
could cause components to clog or malfunction.
2. This water heater will perform in accordance with the boiler water and domestic water temperatures and flows to
which it is connected. To obtain the desired performance, it must be installed to operate with the temperature
and flow conditions specified when selecting the appliance. The boiler water piping must be sized to deliver
sufficient hot water to the heat exchanger without excessive pressure drop.
3. Always use a back-up wrench on tank and heat engine piping when tightening unions, valves, flanges, etc.
Damage caused by plumbing mistakes, such as over-tightening, cross threading or other installation damage is
not covered by warranty.
4. Install shut-off valves and unions in the boiler water and potable water inlet and outlet piping to aid in servicing.
Use caution when threading pipe nipples into tank and heat engine connections to prevent cross threading, or
over-tightening.
5. Obtain and install a Y-strainer, with a blow-down valve piped to a suitable drain, in the boiler supply piping near
the heat exchanger inlet. If the water heater is equipped with the optional factory installed 2-way on/off control
valve or 3-way diverting control valve, a factory installed Y-strainer and blow down valve is included and the
blow-down valve must be piped to a suitable drain.
6. Confirm an air separator in installed the boiler supply piping to the heat exchanger.
7. If a boiler water control valve is installed, maintain standard design practice to avoid “deadheading.”
8. When two or more heaters are piped in parallel it is important that the piping systems are balanced to assure the
full combined capacity is realized. Reverse return piping is recommended for multiple unit installations.
