MEDIUM TEMPERATURE
TWO HEATERS WITH OR WITHOUT
BUILDING RECIRCULATION
RETURN LINE
(IF USED)
CHECK
VALVE
GAS FIRED TANK TYPE
BT-65, BT-80, BT-100
t*TEMPERATURE AND
PRESSURE RELIEF
VALVE
r-
- -V
Lil
h-
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.
INSTALL IN ACCORDANCE WITH LOCAL CODES.
* PIPE RELIEF VALVE TO OPEN DRAIN.
t
AVAILABLE FROM A. O. SMITH.
**OPTIONAL FOR HEATER ISOLATION.
Revised March 1997 (Reviewed October 2003) Printed in the U.S.A. © A. O. Smith Corp. 1997
A 119.0
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