Crown Boiler BWC151 manual Pipe and Circulator Sizing for Indirect Water Heater Loop

TABLE 9.6: PIPE AND CIRCULATOR SIZING FOR INDIRECT WATER HEATER LOOP

	(a)	(b)	(c)	(d)	(e)	(f)
BOILER	PIPE		MAX. I.W.H.	CROWN INDI-		I.W.H. LOOP MAX
		FLOW	PRESSURE		CIRCULATOR	EQUIVALENT
MODEL	SIZE			RECT WATER
			DROP		MODEL	LENGTH
				HEATERS
	(in NPT)	(GPM)	(ft HEAD)			(ft)
				MS-26 (*)
BWC070	1	6.0	1.7	MS-40 (*)	Taco 008	122
				MSH-40H (*)
				MT040GBR (*)
				MS-26
BWC090	1	8.0	3.0	MS-40 (*)	Taco 0014	78
				MSH-40H
				MT040GBR (*)
				MS-26
				MS-40
				MSH-40H
BWC120	1	8.0	3.0	MT040GBR	Taco 0014	108
				MT050GBR
				MT065GBR
				MT080GBR
BWC120	1	8.0	5.0	MSH-53H	Taco 0014	70
				MS-26
				MS-40
				MSH-40H
BWC151	1	8.0	3.0	MT040GBR	Taco 008	49
				MT050GBR
				MT065GBR
				MT080GBR
				MS-53
BWC151	1	8.0	5.0	MS-53H	Taco 0014	150
				MSH-79(*)

TABLE 9.6 NOTES:

1)Indirect water heaters with an asterisk (*) will not achieve their catalog rating due to inadequate boiler water flow and/or inadequate boiler output.

TABLE 9.7: FITTING EQUIVALENT LENGTHS

FITTING	PIPE SIZE	EQUIVALENT LENGTH (ft)
90 ELBOW	1	2.75
TURN IN TEE	1	5.50
RUN OF TEE	1	1.75
SWING CHECK	1	7.00
GATE VALVE	1	0.60

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