Part number 550-142-950/0122
40
FreeStyle
®
series
2
wall mount gas-fired water boiler – boiler manual
Figure 51 Piping to diaphragm (or bladder) expansion tank
Figure 52 Pressure drop through FreeStyle
®
80/120/155 heat exchanger (graphs and table)
18 Primary/Secondary System Piping (continued)
Boiler
Model
BOILER
dT
(ºF)
(GPM)
@
92%
Eff.
Boiler
Head
Loss
(ft. w.c.)
Piping Est. Head Loss -
Ft. (Typical Near Boiler)
Total Loss - Ft.
(Boiler + Near Boiler
Piping)
Recommended
Circulators
3/4” Pipe 1” Pipe 3/4” Pipe 1” Pipe 3/4” Pipe 1” Pipe 1-1/4” Pipe
FS-80
HEAT
ONLY
20 7.4 7.8 12.5 3.0 20.3 10.8 A B,C,D
___30 4.9 4.0 6.0 1.5 10.0 5.5 B,C,D,E B,C,D,E
40 3.7 2.7 3.5 0.8 6.2 3.5 B,C,D,E B,C,D,E
FS-120
HEAT
ONLY
20 11.0 14.4
Not
Recommended
6.0
Not
Recommended
20.4
Not
Recommended
A,F
___30 7.3 7.5 3.0 10.5 B,C,D
40 5.5 4.6 1.8 6.4 B,C,D,E
FS-155
HEAT
ONLY
20 14.3 35.6 9.6 45.8 --- ---
30 9.5 16.4 4.6 21.0 F F
40 7.1 9.2 2.8 12.0 A,B,D A,B,D
Notes:
1. Operating point with current Grundfos pump inside
the boiler.
2. Combi pump included in the boiler is sized properly
for boiler loop.
Circulator Legend:
A - Taco 0014
B - Taco 0015
C - Grundfos UPS 15-58
D - B&G NRF 25
E - Taco 007
F - Taco 0011
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