Manual

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A
C
B
AIR PURGER
BLEEDING
VALVE
MAINTENANCE
VALVE
SUPPLY TO
RADIATORS
EXPANSION
TANK
MOTORIZED
VALVE
A-B PORT
NORMALLY OPEN
A-C PORT
NORMALLY CLOSED
SHUT-OFF
VALVE
DUAL-ENERGY
CONTROLLER
SAFETY VALVE
ROOM
THERMOSTAT
MAINTENANCE
VALVE
MAINTENANCE
VALVE
MAINTENANCE
VALVE
MAINTENANCE
VALVE
BURNER
DRAIN OR
PURGE VALVE
OIL / GAS
BOILER
DUAL-ENERGY PARALLEL INSTALLATION
(Illustration C)
MV
TEMPERATURE /
PRESSURE GAUGE
RETURN FROM
RADIATORS
WATER FEED
POWER SUPPLY
PRESSURE
REDUCING VALVE
PUMP
CONTROL
CIRCULATING PUMP
OUTDOOR RESET
SENSOR
BOILER
ELECTRIC
DRAIN
CONNECTION
AUTOMATIC
AIR VENT
LOAD
MANAGEMENT
CONTROL