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MEDIUM TEMPERATURE - TWO HEATERS HORIZONTAL STORAGE TANK
MEDIUM TEMPERATURE - TWO HEATERS VERTICAL STORAGE TANK
RETURN LINE FROM FIXTURE
CIRCULATING LOOP (IF USED)
SHOULD CONNECT TO ANY OPENING
NEAR BOTTOM OF TANK.
* PIPE RELIEF VALVE TO OPEN DRAIN.
† TANK TEMPERATURE CONTROL SET
AT DESIRED TEMPERATURE - MAX. 170°F
( 76.6°C). HEATER THERMOSTAT SET AT
LEAST 5° HIGHER.
INSTALL IN ACCORDANCE WITH ALL
LOCAL CODES.
CAUTION: IF BUILDING COLD WATER
SUPPLY HAS A BACK-FLOW
PREVENTER, CHECK VALVE OR WATER
METER WITH CHECK VALVE,
PROVISIONS FOR THERMAL
EXPANSION OF WATER IN THE HOT
WATER SYSTEM MUST BE PROVIDED.
NOTE:
BRANCH PIPING TO ALL HEATERS
MUST BE SAME SIZE AND LENGTH FOR
EQUAL FLOW. THESE BRANCHES MAY
BE SIZED UP TO 1 1/4” (31.75 mm) SO
THAT CROSS SECTIONAL AREAS OF ALL
INLETS AND OUTLETS AT LEAST EQUAL
AREA OF THEIR RESPECTIVE MAIN
PIPING.
REVERSE RETURN PIPING SHOWN.
DANGER:
TEMPERATURE SETTING SHOULD NOT
EXCEED SAFE USE TEMPERATURE AT
FIXTURES. SEE WATER TEMPERATURE
CONTROL WARNING ON PAGES 17 & 18.
IF HIGHER PREHEAT TEMPERATURES ARE
NECESSARY TO OBTAIN ADEQUATE
BOOSTER OUTPUT, ADD AN ANTI-SCALD
VALVE FOR HOT WATER SUPPLIED TO
FIXTURES..