9
FILTROL WITH
AIR PURGER
AUTOMATIC
FILL VALVE
SUPPLY TO
SYSTEM
MAIN SHUTOFF
VALVE
DRAIN VALVE
FOR POWER
PURGING
SHUTOFF VALVE
BOILER SERVICE
FILL LINE WITH SHUT OFF VALVE
RETURN FROM SYSTEM
BOILER
DRAIN
VALVE
R
AQUASTAT
S
A01032
Fig. 9 -- Circulator on Supply Pumping Away
FILTROL WITH
AIR PURGER
AUTOMATIC
FILL VALVE
SUPPLY TO
SYSTEM
DRAIN VALVE
FOR POWER
PURGING
SHUTOFF VALVE
BOILER SERVICE
FILL LINE WITH SHUT OFF VALVE
RETURN FROM SYSTEM
BOILER
DRAIN
VALVE
ISOLATION VALVES
THROTTLING VALVE
THROTTLING VALVE
CIRCULATOR
PUMP
AQUASTAT
S
R
MAIN SHUTOFF
VALVE
ADJUST THE TWO THROTTLINE VALVES TO
MAINTAIN AT LEAST 120
O
F IN THE
BOILER RETURN. THE THROTTLING VALVES
ARE USED FOR BYPASS PIPING, IF REQUIRED.
A01034
Fig. 10 -- Bypass Piping Circulator on Supply
FILTROL WITH
AIR PURGER
AUTOMATIC
FILL VALVE
SUPPLY TO
SYSTEM
SHUTOFF VALVE
BOILER SERVICE
FILL LINE WITH
SHUT OFF VALVE
RETURN FROM SYSTEM
BOILER
DRAIN
VALVE
ISOLATION
VALVES
CIRCULATOR
PUMP
AQUASTAT
SHUTOFF VALVE
BOILER SERVICE
*
*
LOCATE CIRCULATOR PUMP HERE WHEN SYSTEM
PIPING USES ZONE VALVES. IF SYSTEM PIPING
USES ZONE CIRCULATORS, USE THIS CIRCULATOR
AS A ZONE CIRCULATOR
A01035
Fig. 11 -- Piping Circulator on Supply Side
BW
4
/BW
5
