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TABLE 9.6: PIPE AND CIRCULATOR SIZING FOR INDIRECT WATER HEATER LOOP
BOILER
MODEL
(a) (b) (c) (d) (e) (f)
PIPE
SIZE
FLOW
MAX. I.W.H.
PRESSURE
DROP
CROWN INDI-
RECT WATER
HEATERS
CIRCULATOR
MODEL
I.W.H. LOOP MAX
EQUIVALENT
LENGTH
(in NPT) (GPM)
(ft HEAD)
(ft)
BWC070 1 6.0 1.7
MS-26 (*)
MS-40 (*)
MSH-40H (*)
MT040GBR (*)
Taco 008 122
BWC090 1 8.0 3.0
MS-26
MS-40 (*)
MSH-40H
MT040GBR (*)
Taco 0014 78
BWC120 1 8.0 3.0
MS-26
MS-40
MSH-40H
MT040GBR
MT050GBR
MT065GBR
MT080GBR
Taco 0014 108
BWC120 1 8.0 5.0 MSH-53H Taco 0014 70
BWC151 1 8.0 3.0
MS-26
MS-40
MSH-40H
MT040GBR
MT050GBR
MT065GBR
MT080GBR
Taco 008 49
BWC151 1 8.0 5.0
MS-53
MS-53H
MSH-79(*)
Taco 0014 150
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.
48
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