A.O. Smith DSE-5 THRU DSE-120 Installation And Operaion Manual page 8

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 TO OPEN DRAIN.
INSTALL IN ACCORDANCE WITH ALL LOCAL CODES.
ONE OR TWO TEMPERATURE - FOUR HEATERS
ONE OR TWO TEMPERATURE - THREE HEATERS
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
8
DANGER
:
FIXTURES..