Bradford-White Corp BWCH, BWCV warranty Hydronic Piping Multiple Boilers, Low Temperature System

Page 16 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.