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Page 18
BRADFORD WHITE CORP.
LEGEND
CHECK VALVE
THERMOMETER
TEMPERATURE
SENSOR
GLOBE VALVE
EXPANSION TANK
WITHAIR SCOOPAND
AUTOAIR VENT
3-WAY VALVE
VALVE
CAUTION: THIS DRAWING SHOWS SUGGESTED
PIPING CONFIGURATIONAND VALVING, CHECK
WITH LOCALCODES ANDORDINANCES FOR
ADDITIONAL REQUIREMENTS.
PRESSURE REDUCING VALVE
W/ FAST FILLBYPASS
PURGE
VALVE
PUMP
PRIMARY/SECONDARY MANDITORY FORALL
VARIABLE FLOW SYSTEMS
INSTALLAIR VENTSAT HIGH POINTS IN SYSTEM
PIPING&SIZING OF EXPANSION TANK
PER TANK MANUFACTURER'S INSTRUCTIONS
DIMENSION "C" (COMMON PIPING)TO BE FOUR
PIPE DIAMETERS, MAX. (NOELBOWS OR VALVES)
BOILER CIRCUIT PIPINGMUST BE EQUAL
TO BOILER WATER CONNECTION SIZE
BOILER CIRC. PUMPSIZED FOR FLOW THROUGH BOILER
DOTTED DEVICES INDICATEALTERNATE LOCATIONS
PUT BOILER CONTROLSENSOR INTHE SYSTEM
C
PUMP LOCATION FOR PUMP-MOUNTEDUNITS
SYSTEM PUMP
MAKE-UP
COLD WATER
SUPPLY
SYSTEM
PUMP LOCATION FOR
NON-PUMP-MOUNTED UNITS
RETURN
SYSTEM
SUPPLY WHEN USINGTHIS PIPING STYLE.
MINIMUM BOILER INLETWATER TEMPERATURE
MUST BEAT LEAST 120°F.
Figure 7. Hydronic Piping - Primary-Secondary, Reverse-Return.