Bradford White BWCH Operations Instructions download pdf (Page 16)

Page 16

BRADFORD WHITE CORP.

PRIMARY/SECONDARY MANDITORY FOR ALL

VARIABLE FLOW SYSTEMS

INSTALL AIR VENTS AT HIGH POINTS IN SYSTEM

PIPING & SIZING OF EXPANSION TANK

PER TANK MANUFACTURER'S INSTRUCTIONS

DIMENSION "C" (COMMON PIPING) TO BE FOUR

PIPE DIAMETERS, MAX. (NO ELBOWS OR VALVES)

BOILER CIRCUIT PIPING MUST BE EQUAL

TO BOILER WATER CONNECTION SIZE

BOILER CIRC. PUMP SIZED FOR FLOW THROUGH BOILER

DOTTED DEVICES INDICATE ALTERNATE LOCATIONS

PUT BOILER CONTROL SENSOR IN THE SYSTEM

PUMP LOCATION FOR PUMP-MOUNTED UNITS

SYSTEM PUMP

MAKE-UP

COLD WATER

SUPPLY

SYSTEM

PUMP LOCATION FOR

NON-PUMP-MOUNTED UNITS

RETURN

SYSTEM

SUPPLY WHEN USING THIS PIPING STYLE.

MINIMUM BOILER INLET WATER TEMPERATURE

MUST BE AT LEAST 120°F.

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

slowly close valveBuntil T1 climbs to

120°F.

3. If T1 is greater than 120°F, slowly close

until T1 dropsto 120°F.

4. Check after system operating temperature

has stabilized. Make final adjustments.

120°F,

valve A

LEGEND

CHECK VALVE

THERMOMETER

TEMPERATURE

SENSOR

GLOBE VALVE

EXPANSION TANK

WITH AIR SCOOP AND

AUTO AIR VENT

3-WAY VALVE

VALVE

CAUTION: THIS DRAWING SHOWS SUGGESTED

PIPING CONFIGURATION AND VALVING, CHECK

WITH LOCAL CODES AND ORDINANCES FOR

ADDITIONAL REQUIREMENTS.

PRESSURE REDUCING VALVE

W/ FAST FILL BYPASS

PURGE

VALVE

PUMP

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

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 63 64

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