A.O. Smith BTH 300 - WATER PIPING DIAGRAMS (cont.); ONE WATER HEATER, SINGLE TEMPERATURE WITH HORIZONTAL STORAGE TANK FORCED RECIRCULATION WITH BUILDING RECIRCULATION

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ONE WATER HEATER, SINGLE TEMPERATURE WITH HORIZONTAL STORAGE TANK FORCED RECIRCULATION WITH BUILDING RECIRCULATION
NOTES: 1. Preferred piping method. 2. The temperature and pressure relief valve setting shall not exceed pressure rating of any component in the system. 3. Service valves are shown for servicing unit. However, local codes shall govern their usage. 4. The tank temperature control should be wired to and control the pump between the water heater(s) and the storage tank(s). 5. The water heater’s operating thermostat should be set 5 degrees F higher than the tank temperature control.
LEGEND
TEMPERATURE & PRESSURE RELIEF VALVE PRESSURE RELIEF VALVE CIRCULATING PUMP
TEMPERATURE CONTROL PROBE
DRAIN
FULL PORT BALL VALVE
TEMPERATURE GAGE WATER FLOW SWITCH CHECK VALVE
WARNING: THIS DRAWING SHOWS SUGGESTED PIPING CONFIGURATION AND OTHER DEVICES; CHECK WITH LOCAL CODES AND ORDINANCES FOR ADDITIONAL REQUIREMENTS. ANY MATERIAL, COMPONENT OR VENDOR CHANGE MUST HAVE PRIOR APPROVAL BY THE APPLICABLE
PRODUCT ENGINEERING DEPARTMENT.
FINISHED FLOOR
HOT WATER RETURN
PIPE T&P TO OPEN DRAIN
HOT
WATER
TO FIXTURES
CIRCULATING PUMP
ALTERNATE LOCATION
COLD WATER SUPPLY
EXPANSION TANK
STORAGE TANK