Revised March 1997
A 111.0
GAS FIRED TANK TYPE
BT-65 THRU BT-100
ONE OR TWO TEMPERATURE–
ONE HEATER MEDIUM TEMPERATURE
STORAGE WITH OR WITHOUT
RECIRCULATION
LINE
HEATER WITH MIXING VALVE AND RECIRCULATED LOOP
FROM TANK
OUTLET
CHECK VALVE
CHECK VALVE
R
12"
TO
15"
HOT WATER
OUTLET
COLD
WATER
INLET
TEMPERED
WATER OUTLET
=
MIXING VALVE
TO TANK
INLET
CIRCULATING RETURN LINE CONNECTIONS
– TEMPERED WATER LOOP, IF USED, CONNECT
TO POINT R
– STORED TEMPERATURE WATER LOOP, IF USED,
CONNECT TO COLD WATER INLET.
MIXING VALVE APPLICATION FOR
TWO TEMPERATURE WATER
HEATER
HEATER WITH OR WITHOUT MIXING VALVE
WIRING DIAGRAM FOR EACH WATER LOOP (IF USED)
INSTALL THERMAL EXPANSION
TANK ON COLD WATER SUPPLY
LINE, IF CHECK VALVE OR
PRESSURE REDUCING VALVE
IS USED IN SUPPLY.
INSERT A
*
PIPE RELIEF VALVE TO OPEN DRAIN.
AVAILABLE FROM A. O. SMITH.
INSTALL IN ACCORDANCE WITH LOCAL CODES.
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.
