BOILER
DHW
CIRCULATOR
CH CIRCULATOR
PRIORITY ZONE
CIRCULATOR
EXPANSION
TANK
WATER INLET
FLOW CONTROL
VAVLE
SHUT-OFF
VALVE
PRESSURE
REDUCER VALVE
CHECK VALVE
BALL VALVE
AIR SEPARATOR
ZONE VALVE
HOSE BIB
PiPiNg DiAgrAMS
22
DHW Heater
Diagram 2 - Single Zone system with domestic hot water DHW priority