A 112.0 © A. O. Smith Corp. 1997 Printed in the U.S.A.
GAS FIRED TANK TYPE
BTC-120 THRU BTC-500
BTP-139 THRU BTP-700
=
* PIPE RELIEF VALVE TO OPEN DRAIN.
AVAILABLE FROM A. O. SMITH.
INSTALL IN ACCORDANCE WITH LOCAL CODES.
ONE OR TWO TEMPERATURE–
ONE HEATER MEDIUM TEMPERATURE
STORAGE WITH OR WITHOUT
RECIRCULATION
LINE
WIRING DIAGRAM FOR EACH WATER LOOP (IF USED)
HEATER WITH OR WITHOUT MIXING VALVE
HEATER WITH MIXING VALVE AND RECIRCULATED LOOP
INSTALL THERMAL EXPANSION
TANK ON COLD WATER SUPPLY
LINE, IF CHECK VALVE OR
PRESSURE REDUCING VALVE
IS USED IN SUPPLY.
INSERT A
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.
