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42
XvI - PIPING AND wIRING APPENDIX
ZONE 3
ZONE 2
ZONE 1 (PRIORITY ZONE)
(TO PREVENT FORCED
FLOW IN SECONDARY)
12" MAX APART
BOILER
CIRCULATOR
BOILER
ALTERNATE BOILER
CIRCULATOR
LOCATION
ZONE 4
*USE FULL PORT ZONE
VALVE.
DHW CIRCULATOR
CH CIRCULATOR
WATER INLET
CIRCULATOR
SHUT-OFF
VALVE
PRESSURE
REDUCER VALVE
CHECK VALVE
BALL VALVE
AIR SEPARATOR
ZONE VALVE
HOSE BIB
FLOW CONTROL
VALVE
EXPANSION
TANK
Piping Diagram 7
Primary/secondary piping with zone valves and domestic hot water
(with circulator)
NOTE: RECOmmENDED fOR ANTIfREEZE APPLICATIONs
*sEE NOTE