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BRADFORD WHITE CORP.

 

 

 

 

 

C

SYSTEM

 

RETURN

B

 

A

PUMP LOCATION FOR

NON-PUMP-MOUNTED UNITS

T1

COLD WATER

MAKE-UP

C

 

SYSTEM

SYSTEM PUMP

SUPPLY

B

A

ADJUSTMENT PROCEDURE TO MAINTAIN 120°F INLET TEMP:

1.Turn on boiler and open valves A & B.

2.After steady-state operation, if T1 is less than 120°F, slowly close valve B until T1 climbs to 120°F.

3.If T1 is greater than 120°F, slowly close valve A until T1 drops to 120°F.

4.Check after system operating temperature has stabilized. Make final adjustments.

T1

CAUTION: THIS DRAWING SHOWS SUGGESTED

 

 

PIPING CONFIGURATION AND VALVING, CHECK

PUMP LOCATION FOR PUMP-MOUNTED UNITS

WITH LOCAL CODES AND ORDINANCES FOR

ADDITIONAL REQUIREMENTS.

 

 

PRIMARY/SECONDARY MANDITORY FOR ALL

 

 

 

 

 

 

 

 

VARIABLE FLOW SYSTEMS

 

 

 

 

INSTALL AIR VENTS AT HIGH POINTS IN SYSTEM

LEGEND

 

 

PIPING & SIZING OF EXPANSION TANK

 

 

 

 

 

 

EXPANSION TANK

PER TANK MANUFACTURER'S INSTRUCTIONS

THERMOMETER

 

DIMENSION "C" (COMMON PIPING) TO BE FOUR

 

WITH AIR SCOOP AND

 

 

 

 

PIPE DIAMETERS, MAX. (NO ELBOWS OR VALVES)

 

 

AUTO AIR VENT

TEMPERATURE

PURGE

 

 

 

VALVE

 

 

BOILER CIRCUIT PIPING MUST BE EQUAL

SENSOR

 

 

 

 

3-WAY VALVE

TO BOILER WATER CONNECTION SIZE

GLOBE VALVE

 

BOILER CIRC. PUMP SIZED FOR FLOW THROUGH BOILER

 

 

 

 

 

 

 

CHECK VALVE

 

VALVE

 

DOTTED DEVICES INDICATE ALTERNATE LOCATIONS

 

 

 

 

 

 

PUT BOILER CONTROL SENSOR IN THE SYSTEM

 

 

 

 

PRESSURE REDUCING VALVE

 

 

SUPPLY WHEN USING THIS PIPING STYLE.

 

 

 

W/ FAST FILL BYPASS

PUMP

 

MINIMUM BOILER INLET WATER TEMPERATURE

 

 

 

 

MUST BE AT LEAST 120°F.

Figure 5. Hydronic Piping — Multiple Boilers, Low Temperature System.

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Image 16
Bradford-White Corp BWCH, BWCV, Copper Brute II Hydronic Boiler Hydronic Piping Multiple Boilers, Low Temperature System