Bradford White S-2-TW75T6BN - Manual

238-48283-00B REV 11/10
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 side and top of the appliance. 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. 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 140
F. Water
temperature over 125
F 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.
THERMOSTATIC
MIXING VALVE
SHUT-OFF VALVE
VACUUM BREAKER
SOLAR RETURN
FROM COLLECTOR
TEMPERED
POTABLE WATER
COLD WATER
SUPPLY