A.O. Smith DSE-5 THRU DSE-120 Installation And Operaion Manual page 12

MEDIUM TEMPERATURE - FOUR HEATERS VERTICAL STORAGE TANK
MEDIUM TEMPERATURE - FOUR HEATERS HORIZONTAL STORAGE TANK
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.
* 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.
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.
12
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..