Part number 550-100-305/0118
38
AquaBalance
TM
W
ALL
M
OUNT
GAS
-
FIRED
WATER
BOILER
—
Boiler Manual
17
Primary/Secondary System Piping
(continued)
Figure 47
Piping to diaphragm (or bladder) expansion tank
Figure 48
Pressure drop through
AquaBalance
TM
80/120/155 heat exchanger (graphs and table)
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.
( Near Boiler
Piping)
Recommended
Circulators
3/4” Pipe
1” Pipe
3/4” Pipe
1” Pipe
3/4” Pipe
1” Pipe
1-1/4” Pipe
WMB-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
WMB-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
WMB-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