A.O. Smith COF-199, COF-700 Technical Documents
APPLICA TION TYPE DIAGRAM
SEE INST ALLATION MANUAL
FOR COMPLETE INSTRUCTIONS
INSTALL IN ACCORDANCE WITH LOCAL CODES.
ONE OR TWO TEMPERA TURE
TWO HEA TERS
WITH OR W/O MIXING V AL VE
TWO PREHEA TERS WITH BOOSTER
HEA TER WITH OR W/O BUILDING
RECIRCULA TTION
OIL FIRED TANK TYPE
COF-199 THRU 700
MUST BE IDENTICAL HEATERS
TWO HEATERS WITH OR WITHOUT MIXING VALVE
OUTLET
(BOOSTED
TEMPERATURE)
MUST BE IDENTICAL HEATERS
TWO PRE-HEATERS WITH BOOSTER HEATER
CAUTION:
IF BUILDING COLD WA TER SUPPL Y HAS A BACKFLOW
PREVENTER, CHECK V ALVE OR W A TER METER WITH
CHECK V ALVE, PROVISIONS FOR THERMAL EXPANSION OF WA TER IN THE HOT WA TER SYSTEM MUST BE
PROVIDED.
* PIPE RELIEF VAL VE T O OPEN DRAIN.
** 120°F SHOULD BE MINIMUM AND 140°F TO 150°F
SHOULD BE MAXIMUM TEMPERATURE OF WATER
STORED IN PRE-HEATER.
SEE PAGE A305.0 FOR MANIFOLD KITS.
Revised March 1996
A 309.0
MEDIUM TEMPERATURE
ONE HEATER WITH
AUXILIARY STORAGE TANK
FORCED CIRCULATION WITH
OR W/O BUILDING RECIRCULATION
OIL FIRED TANK TYPE
COF-199 THRU 700
APPLICA TION TYPE DIAGRAM
SEE INST ALLATION MANUAL
FOR COMPLETE INSTRUCTIONS
INSTALL IN ACCORDANCE WITH LOCAL CODES.
VERTICAL STOTRAGE TANK
CAUTION:
IF BUILDING COLD WA TER SUPPL Y HAS A BACKFLOW
PREVENTER, CHECK VAL VE OR W ATER METER WITH
CHECK V ALVE, PROVISIONS FOR THERMAL EXP ANSION OF WA TER IN THE HOT WA TER SYSTEM MUST BE
PROVIDED.
* PIPE RELIEF VAL VE T O OPEN DRAIN.
HORIZANTAL STORAGE TANK
HEATER THERMOST A TS SHOULD BE SET A T LEAST 5°
HIGHER THAN TANK TEMPERA TURE CONTROL.
A 310.0
© A. O. Smith Corp., 1996
Printed in U.S.A.
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