ONE OR TWO TEMPERATURE–
ONE HEATER MEDIUM TEMPERATURE
STORAGE WITH OR WITHOUT
RECIRCULATION
GAS FIRED TANK TYPE
BT-65 THRU BT-100
MIXING VALVE APPLICATION FOR
TWO TEMPERATURE WATER
HOT WATER
OUTLET
12"
TO
FROM TANK
OUTLET
15"
TEMPERED
WATER OUTLET
HEATER
CHECK VALVE
=
MIXING VALVE
R
CHECK VALVE
COLD
WATER
INLET
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.
HEATER WITH OR WITHOUT MIXING VALVE
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.
INSERT A
INSTALLTHERMALEXPANSION
TANK ON COLD WATER SUPPLY
LINE, IF CHECK VALVE OR
PRESSURE REDUCING VALVE
IS USED IN SUPPLY.
HEATER WITH MIXING VALVE AND RECIRCULATED LOOP
WIRING DIAGRAM FOR EACH WATER LOOP (IF USED)
LINE
INSTALL IN ACCORDANCE WITH LOCAL CODES.
*PIPE RELIEF VALVE TO OPEN DRAIN.
AVAILABLE FROM A. O. SMITH.
RevisedMarch1997
A 111.0
ONE OR TWO TEMPERATURE–
ONE HEATER MEDIUM TEMPERATURE
STORAGE WITH OR WITHOUT
RECIRCULATION
GAS FIRED TANK TYPE
BTC-120 THRU BTC-500
BTP-139 THRU BTP-700
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.
INSERT A
HEATER WITH OR WITHOUT MIXING VALVE
INSTALLTHERMALEXPANSION
TANK ON COLD WATER SUPPLY
LINE, IF CHECK VALVE OR
PRESSURE REDUCING VALVE
IS USED IN SUPPLY.
HEATER WITH MIXING VALVE AND RECIRCULATED LOOP
WIRING DIAGRAM FOR EACH WATER LOOP (IF USED)
LINE
INSTALL IN ACCORDANCE WITH LOCAL CODES.
*PIPE RELIEF VALVE TO OPEN DRAIN.
=
AVAILABLE FROM A. O. SMITH.
A 112.0
© A. O. Smith Corp. 1997
Printed in the U.S.A.
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