14
ONE TEMPERATURE - ONE HEATER VERTICAL STORAGE TANK FORCED
CIRCULATION WITH OR WITHOUT BUILDING RECIRCULATION
SCALD PREVENTION
HOT WATER CAN SCALD IF USED
CARELESSLY OR IN UNANTICIPATED
MANNER.
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: CONNECT RETURN LINE FROM
HOT WATER CIRCULATING LOOP
(IF USED) TO COLD WATER INLET LINE.
ONE TEMPERATURE - ONE HEATER HORIZONTAL STORAGE TANK FORCED
CIRCULATION WITH OR WITHOUT BUILDING RECIRCULATION
DANGER:
TEMPERATURE SETTING SHOULD NOT EXCEED SAFE
TEMPERATURES AT FIXTURES. SEE WATER TEMPERATURE
CONTROL WARNING ON PAGE 10. IF HIGHER PREHEAT
TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE
BOOSTER OUTPUT, ADD AN ANTI-SCALD VALVE FOR HOT
WATER SUPPLIED TO FIXTURES.
NOTE:
WHEN USING A STATE T-140,200,350,OR 400 STORAGE TANK,
USE LOWER 3/4" (19 mm) OPENING FOR TANK TEMP.CONTROL
WIRING DIAGRAM FOR HEATER TO TANK LOOP
AND /OR HOT WATER LOOP (IF USED)
* PIPE TO OPEN DRAIN
INSTALL IN ACCORDANCE WITH LOCAL CODES
INSTALLATION DIAGRAMS
INSET B
VACUUM RELIEF VALVE
INSTALL PER LOCAL CODES.
INSET A
INSTALL THERMAL EXPANSION
TANK IN COLD WATER SUPPLY LINE,
IF CHECK VALVE OR PRESSURE
REDUCING VALVE IS USED IN
SUPPLY.
