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13
MULTIPLE ZONES WITH CIRCULATORS Fig. #8999.1
MULTIPLE ZONES WITH ZONE VALVES Fig. #9000.1
HEATING UNITS
CIRCULATORS
COLD
WATER
INLET
FEED
VALVE
PIPE PRESSURE
RELIEF VALVE
TO DRAIN
DIAPHRAGM
EXPANSION
TANK
AIR
SCOOP
AIR
VENT
12" MAX.
AIR
VENT
AIR
SCOOP
COLD
WATER
INLET
FEED
VALVE
PIPE PRESSURE
RELIEF VALVE
TO DRAIN
DIAPHRAGM
EXPANSION
TANK
HEATING UNITS
ZONE
VALVES