Figure 5 - Primary/Secondary Piping With Circulators And Domestic Hot Water
ZONE 4
ZONE 3 ..............................
ZONE 2 .................
I
Ilililll _lIl_lll III Illll Ill
II_lill!l/IIIIIllll Illll_llilllli IllIlll
I_lillll_lllillll III
ZONE 1 (PRIORITY ZONE)
WATER tNLE _ l
EXPANSION /_
TANK I
_ BOILER
I
_-__J FLOW CONTROL
VALVE
CIRCULATOR _ PRESSURE _ BALL VALVE
(PUMP) REDUCER VALVE
_---._ CHECK VALVE _ ZONE VALVE H I
SIlL%OFF
VALVE ± HOSE BIB
AIR SEPARATOR
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