UTICA BOILERS MGB50 Installation, Operation & Maintenance Manual page 9

Figure 8 - Single Zone System With DHW Priority
BOILER
HOSE BIB
FLOW CONTROL
VAVLE
Figure 9 - Multi Zone System With Circulators And DHW Priority
WATER INLET
BOILER
connectIng supply and return pIpIng
WATER INLET
EXPANSION
TANK
PRIORITY ZONE
CIRCULATOR
SHUT-OFF
VALVE
EXPANSION
TANK
PRESSURE
CIRCULATOR
REDUCER VALVE
SHUT-OFF
CHECK VALVE
VALVE
CH CIRCULATOR
DHW
CIRCULATOR
PRESSURE
BALL VALVE
REDUCER VALVE
ZONE VALVE
CHECK VALVE
CIRC 4
CIRC 3
CIRC 2
DHW CIRCULATOR
BALL VALVE
ZONE VALVE
9
AIR SEPARATOR
ZONE 4
ZONE 3
ZONE 2
ZONE 1 (PRIORITY ZONE)
AIR SEPARATOR
FLOW CONTROL
HOSE BIB
VALVE