A.O. Smith BT-100 User Manual

HEATER

HEATER WITH OR WITHOUT MIXING VALVE

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

TEMPERED

WATER OUTLET

R

COLD

WATER

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.

CHECK VALVE

=

MIXING VALVE

TO TANK

INLET

12"
TO
15"

CHECK VALVE

FROM TANK

OUTLET

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

INSTALL THERMAL EXPANSION
TANK ON COLD WATER SUPPLY
LINE, IF CHECK VALVE OR
PRESSURE REDUCING VALVE
IS USED IN SUPPLY.

WIRING DIAGRAM FOR EACH WATER LOOP (IF USED)

LINE

HEATER WITH MIXING VALVE AND RECIRCULATED LOOP

INSTALL IN ACCORDANCE WITH LOCAL CODES.

*PIPE RELIEF VALVE TO OPEN DRAIN.

AVAILABLE FROM A. O. SMITH.

Revised March 1997 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

INSTALL THERMAL EXPANSION
TANK ON COLD WATER SUPPLY
LINE, IF CHECK VALVE OR
PRESSURE REDUCING VALVE
IS USED IN SUPPLY.

HEATER WITH OR WITHOUT MIXING VALVE

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.