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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
ALLIANCE™
INDIRECT WATER
HEATERS
CIRCULATOR
MODEL
I.W.H. LOOP MAX
EQUIVALENT
LENGTH
(in NPT) (GPM)
(ft HEAD)
(ft)
FCM090 1 8.0 3.0
AL27SL
AL35SL
AL50SL (*)
AL70SL (*)
AL119SL (*)
Taco 0014 50
FCM090 1 8.0 3.0
AL27SL
AL35SL
AL50SL (*)
AL70SL (*)
AL119SL (*)
Taco 0013
(Note #3)
190
FCM120 1 8.0 3.0
AL27SL
AL35SL
AL50SL
AL70SL
AL119SL
Taco 0014 71
FCM120 1 8.0 5.0
AL27SL
AL35SL
AL50SL
AL70SL
AL119SL
(Note #2)
Taco 0014 45
FCM120 1 8.0 5.0
AL27SL
AL35SL
AL50SL
AL70SL
AL119SL
(Note #2)
Taco 0013
(Note #3)
185
NOTES:
1) Indirect water heaters with an asterisk (*) will not achieve their catalog rating due to inadequate boiler output.
2) When used with an indirect heater having a pressure drop less than 3.0 ft of head, the Taco 0013 can be installed
with up to 211 equivalent ft of 1” pipe.
3) Use isolation relay between Taco 0013 and FCM - see Figure 10.3
TABLE 9.5: PIPE AND CIRCULATOR SIZING FOR BOILER LOOP
BOILER
MODEL
(a) (b) (c) (d) (e)
PIPE
SIZE
FLOW
TEMP
RISE
CIRCULATOR
MODEL
BOILER LOOP
MAX EQUIVA-
LENT LENGTH
(in NPT) (GPM) (F) (ft)
FCM090 1 8.0 21 Taco 0014 90
FCM090 1 8.0 21 Taco 0013 (Note #1) 230
FCM120 1 8.0 29 Taco 0014 111
FCM120 1 9.0 25 Taco 0014 61
FCM120 1 12.0 19 Taco 0013 (Note #1) 28
NOTE: 1) Use isolation relay between Taco 0013 and FCM - see Figure 10.3