Williamson-Thermoflo FreeStyle 2 Series Manual page 40

FreeStyle
Series 2 wall mount gas-fired water boiler — Boiler Manual
18 Primary/Secondary System Piping
Figure 51
Figure 52
(GPM)
BOILER
@
Boiler
dT
Model
92%
(ºF)
Eff.
20 7.4
FS-80
30 4.9
HEAT
ONLY
40 3.7
20 11.0
FS-120
30 7.3
HEAT
ONLY
40 5.5
20 14.3
FS-155
30 9.5
HEAT
ONLY
40 7.1
Notes:
1. Operating point with current Grundfos pump inside
the boiler.
2. Combi pump included in the boiler is sized properly
for boiler loop.
40
FreeStyle
Boiler
Piping Est. Head Loss -
Head
Ft. (Typical Near Boiler)
Loss
(ft. w.c.)
3/4" Pipe 1" Pipe
7.8 12.5
4.0 6.0
2.7 3.5
14.4
7.5
4.6
Not
Recommended
35.6
16.4
9.2
(continued)
Total Loss - Ft.
(Boiler + Near Boiler
Piping)
3/4" Pipe 1" Pipe
3.0 20.3 10.8
1.5 10.0 5.5
0.8 6.2 3.5
6.0 20.4
3.0 10.5
1.8 6.4
Not
Recommended
9.6 45.8
4.6 21.0
2.8 12.0
Circulator Legend:
Recommended
Circulators
3/4" Pipe 1" Pipe
A B,C,D
B,C,D,E B,C,D,E
B,C,D,E B,C,D,E
A,F
B,C,D
B,C,D,E
Not
Recommended
---
F
A,B,D
A - Taco 0014
B - Taco 0015
C - Grundfos UPS 15-58
D - B&G NRF 25
E - Taco 007
F - Taco 0011
Part number 550-142-950/0919
1-1/4" Pipe
___
___
---
F
A,B,D