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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°).
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” 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..