A.O. Smith BTI 120 Installation & Operation Manual page 16

TWO TEMPERATURE - ONE HEATER HIGH TEMPERATURE STORAGE
NOTE 1: TOGGLE SWITCH CONTROLS 180°F (82°C) WATER
CIRCULATION. INSTALL ON OR CLOSE TO DISHWASHING
MACHINE. TOGGLE SWITCH MUST BE CLOSED (ON) DURING
THE RINSE OPERATION AND OPEN (OFF) WHEN DISHWASHER
IS NOT OPERATING OR WHEN ON LONG STANDBY.
NOTE 2: INSTALL LINE TEMPERATURE CONTROL IN AN UNINSULATED
TEE BEYOND THE DISHWASHING MACHINE TAKEOFF IN THE
SANITIZING LOOP. CONTROL SHOULD BE SET AT 185°F
(85°C).
NOTE 3: ADJUST PLUG COCK SO THE SANITIZING LOOP FLOW RATE
DOES NOT CAUSE UNNECESSARY TURBULENCE IN THE TANK.
* TEMPERED WATER LOOP, IF USED, CONNECT TO
POINT "A".
**PIPE RELIEF VALVE TO OPEN DRAIN.
INSTALL IN ACCORDANCE WITH LOCAL CODES.
CAUTION: 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.
WITH RECIRCULATION OF SANITIZING LOOP
TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE
TEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROL
WARNING ON PAGE 25. IF HIGHER PREHEAT TEMPERATURES ARE
NECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT, ADD AN ANTI-
SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES.
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DANGER