Installation / Operation Instruction Manual
238-48283-00C REV 4/13
INSTALLATION INSTRUCTION - SUPPLEMENT SHEET
HEATING WITH THE SOLAR WATER HEATER WITH GAS BACKUP
POTABLE AND SOLAR HEATING CONNECTIONS
The water heater interior has been designed for potable water, such as in a solar heating system. If replacing an
existing water heating appliance, be sure to turn off electrical power and/or gas supply to the existing appliance.
Warning: All solar plumbing, connections and components must be applicable for potable water
installations and rated for 150 psi working and 300 psi test pressure.
The solar thermal system connections are identified on the solar water heater. The use of shut off valves and
unions are recommended for future service convenience. Consult local codes for proper use, sizing and
installation of an expansion tank.
Due to the elevated operating temperature that may be obtained with the solar heating system, an ASSE
approved thermostatic mixing valve has been provided and must be installed in the potable water piping
diagram as shown in Figure 1 and Figure 2. Directions for proper installation and adjustment are provided in
the ASSE approved thermostatic mixing valve carton.
Warning: Failure to properly install and regulate the provided ASSE approved thermostatic mixing
valve may increase the danger of scald injury and nullify the warranty.
Figure 1 – Thermostatic Mixing Valve Piping Diagram for Tempered Water (Except 100-Gallon)
DANGER
Hotter water increases the risk of scald injury. Scalding may occur within 5 seconds at a setting of 140F. Water
temperature over 125F can cause severe burns or death from scalds. Children, disabled and the elderly are at the
highest risk of being scalded. Please feel the water before bathing or showering.