32
XvI - PIPING aND wIRING aPPENDIX
ZONE 3
ZONE 2
ZONE 1 (PRIORITY ZONE)
BOILER
WATER INLET
CH & DHW
SYSTEM
CIRCULATOR
*USE FULL PORT ZONE
VALVE. FOR OPTIMUM TANK
PERFORMANCE, CONSIDER
USING ZONE CIRCULATOR
(SEE FIGURE 5)
ZONE 4
CIRCULATOR
SHUT-OFF
VALVE
PRESSURE
REDUCER VALVE
CHECK VALVE
EXPANSION
TANK
AIR SEPARATOR
ZONE VALVE
HOSE BIB
FLOW CONTROL
VALVE
Piping Diagram 2
Multizone piping with zone valves and domestic hot water priority
(with zone valve)
NOTE: NOT RECOmmENDED fOR aNTIfREEZE aPPLICaTIONS