Columbia MCB50 - Page 9

9
ZONE 3
ZONE 2
ZONE 1 (PRIORITY ZONE)
BOILER
ZONE 4
DHW CIRCULATOR
WATER INLET
CIRC 2
CIRC 3
CIRC 4
CIRCULATOR
SHUT-OFF
VA LV E
PRESSURE
REDUCER VALVE
CHECK VALVE
BALL VALVE
AIR SEPARATOR
ZONE VALVE
HOSE BIB
FLOW CONTROL
VA LV E
EXPANSION
TANK
BOILER
DHW
CIRCULATOR
CH CIRCULATOR
PRIORITY ZONE
CIRCULATOR
EXPANSION
TANK
WATER INLET
FLOW CONTROL
VAV L E
SHUT-OFF
VA LV E
PRESSURE
REDUCER VALVE
CHECK VALVE
BALL VALVE
AIR SEPARATOR
ZONE VALVE
HOSE BIB
SINGLE ZONE SYSTEM WITH
DHW PRIORITY
MULTIZONE SYSTEM WITH CIRCU-
LATORS AND DHW PRIORITY
CONNECTING SUPPLY AND RETURN PIPING
Figure #7
Figure #8