Bradford-White Corp BWCH Water Heater User Manual


 
Page 19
COPPER BRUTE II (500 - 2000)
LEGEND
CHECK VALVE
THERMOMETER
TEMPERATURE
SENSOR
GLOBE VALVE
EXPANSION TANK
WITHAIR SCOOPAND
AUTOAIR VENT
3-WAY VALVE
VALVE
PRESSURE REDUCING VALVE
W/ FAST FILLBYPASS
PURGE
VALVE
PUMP
CAUTION: THIS DRAWING SHOWS SUGGESTED
PIPING CONFIGURATIONAND VALVING, CHECK
WITH LOCALCODES ANDORDINANCES FOR
ADDITIONAL REQUIREMENTS.
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 INTHE SYSTEM
PUMP LOCATION FOR PUMP-MOUNTEDUNITS
SUPPLY WHEN USINGTHIS PIPING STYLE.
MINIMUM BOILER INLETWATER TEMPERATURE
MUST BEAT LEAST 120°F.
C
SYSTEM PUMP
MAKE-UP
COLD WATER
SUPPLY
SYSTEM
PUMP LOCATION FOR
NON-PUMP-MOUNTED UNITS
RETURN
SYSTEM
T1 T1
A
B
A
B
ADJUSTMENT PROCEDURETO MAINTAIN
120°F INLETTEMP:
1. Turn on boiler and openvalves A&B.
2.After steady-state operation, ifT1 is less than
120°F, slowlyclose valveBuntil T1 climbs to
120°F.
3. If T1is greater than 120°F,slowly close valve
Auntil T1 dropsto 120°F.
4. Check after system operating temperaturehas
stabilized. Make finaladjustments.
Figure 8. Hydronic Piping - Primary-Secondary, Reverse-Return, Low Temperature.