Filter
Top Products
Page 16
BRADFORD WHITE CORP.
PRIMARY/SECONDARY MANDITORY FORALL
VARIABLE FLOW SYSTEMS
INSTALLAIR VENTSAT HIGH POINTS IN SYSTEM
PIPING & SIZING OFEXPANSION 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 IN THESYSTEM
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.
C
ADJUSTMENT PROCEDURETO MAINTAIN
120°F INLETTEMP:
1. Turn on boiler and open valvesA&B.
2.After steady-state operation, ifT1 is less than
slowly close valveBuntilT1 climbs to
120°F.
3. If T1is greater than 120°F, slowlyclose
until T1 dropsto 120°F.
4. Check after system operating temperature
has stabilized. Makefinal adjustments.
120°F,
valveA
A
B
T1
B
A
T1
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
Figure 5. Hydronic Piping — Multiple Boilers, Low Temperature System.