A.O. Smith BT-100 Wiring Diagram

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.