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INSTALLATION DIAGRAMS
ONE TEMPERATURE - ONE HEATER VERTICAL STORAGE TANK
FORCED CIRCULATION WITH OR WITHOUT BUILDING RECIRCULATION
DANGER
IF BUILDING COLD WATER SUPPLY HAS A
BACKFLOW PREVENTER, CHECK VALVE OR
WATER METER WITH CHECK VALVE,
PROVISIONS FOR THERMAL EXPANSION OF
WATER IN THE HOT WATER SYSTEM MUST
BE PROVIDED.
NOTE: CONNECT RETURN LINE FROM HOT
WATER RECIRCULATING LOOP (IF USED) TO
COLD WATER INLET LINE.
ONE TEMPERATURE - ONE HEATER HORIZONTAL STORAGE TANK
FORCED CIRCULATION WITH OR WITHOUT BUILDING RECIRCULATION
DANGER
TEMPERATURE SETTING SHOULD NOT EXCEED SAFE
TEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE
CONTROL WARNING ON PAGE 23. IF HIGHER PREHEAT
TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE
BOOSTER OUTPUT, ADD AN ANTI-SCALD VALVE FOR HOT
WATER SUPPLIED TO FIXTURES.
*PIPE TO OPEN DRAIN INSTALL IN ACCORDANCE WITH LOCAL CODES
NOTE:
WHEN USING AN A.O. SMITH T-140, 200, 350 OR 400
STORAGE TANK, USE LOWER 3/4” OPENING FOR TANK TEMP. CONTROL
CIRCULATING PUMP WIRING DIAGRAM