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MEDIUM TEMPERATURE - ONE HEATER WITH AUXILIARY STORAGE TANK FORCED
CIRCULATION WITH OR WITHOUT BUILDING RECIRCULATION
VERTICAL STORAGE TANK
HORIZONTAL STORAGE TANK
DANGER
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.
* PIPE RELIEF VALVE TO OPEN DRAIN.
**WHEN USING A T-140, -200,
-350 OR -400 STORAGE TANK, USE
LOWER 3/4” OPENING FOR TANK
TEMPERATURE CONTROL.
IF BUILDING CIRCULATING LOOP IS USED,
CONNECT TO AN OPENING NEAR THE
BOTTOM OF THE TANK.
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.
*PIPE RELIEF VALVE TO OPEN DRAIN
INSTALL IN ACCORDANCE WITH LOCAL CODES.