State Industries 540A, 650A, 740A warranty Wiring Diagram for Tempered Water Loop if Used

TWO TEMPERATURE - ONE HEATER HIGH TEMPERATURE

WITH OR WITHOUT BUILDING RECIRCULATION

*PIPE RELIEF VALVE TO OPEN DRAIN

NOTE: I F T E M P E R E D W AT E R I S RECIRCULATED, RETURN LINE SHOULD BE CONNECTED AT POINT “A”.

INSTALL IN ACCORDANCE WITH LOCAL

CODES

DANGER

T E M P ERAT URE SETTING SHOULD

NOT EXCEED SAFE TEMPERATURE AT

FIXTURES. SEE WATER TEMPERATURE

CONTROL WARNING ON PAGE 23. IF

HIGHER PREHEAT TEMPERATURES ARE

NECESSARY TO OBTAIN ADEQUATE

BOOSTER OUTPUT, ADD AN ANTI-SCALD

VALVE FOR HOT WATER SUPPLIED TO

FIXTURES.

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.

WIRING DIAGRAM FOR TEMPERED WATER LOOP (IF USED)

CIRCULATING PUMP WIRING DIAGRAM

TWO TEMPERATURE - TWO HEATERS HIGH TEMPERATURE

WITH OR WITHOUT BUILDING RECIRCULATION

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