BOILER
ALTERNATE
CIRCULATOR
LOCATION
TO SYSTEM
FROM SYSTEM
V2
V1
CIRCULATOR
SHUT-OFF
VALVE
PRESSURE
REDUCER VALVE
CHECK VALVE
BALL VALVE
AIR SEPARATOR
ZONE VALVE
EXPANSION
TANK
WATER INLET
SYSTEM
CIRCULATOR
PiPiNg DiAgrAMS
30
Adjust the two throttling valves to maintain at least 130°F - 140°F in the boiler return.
Diagram 9 - Bypass Piping (Fixed Low Temp Only)