Slant/Fin LX-90 Installation And Operating Instructions Manual page 26

26
10
8
6
Head
(feet w.c.)
4
2
0
0
Figure 19. Boiler water side pressure drop
Boiler Flow
Model Rate
No. (gpm)
8.1
6.5
5.4
4.0*
10.8
8.6
7.2
5.4*
13.5
10.8
9.0
6.8*
Table 2. Recommended pump models for domestic hot water tank piping.
Notes:
* This is the minimum flow rate recommended for the boiler.
** Domestic water tank piping head is based on 1" inside diameter piping and full port valves.
*** Refer to the DHW Tank Manufacturer's water flow rate requirements and associated pressure drop head loss, to select
the appropriate circulator.
Or Grundfos UPS 26-99F.
2
4 6
Flow Rate (GPM)
Boiler
Temp
Head
Rise
Loss
(°F)
(Feet w.c.)
20 8.2
25 5.4
30 3.5
40 2.1
20 9.5
25 6.6
30 4.2
40 2.5
20 9.0
25 6.0
30 4.2
40 2.5
8 10
Available Head Capability Left for Various
Domestic
Water Model Circulators to Overcome DHW Tank
Tank Piping
Head Loss **
Taco 0014
(Feet w.c.)
2.5 7.3
2.2 10.9
2.0 14.0
1.5 16.4
3.0 4.5
2.7 8.5
2.5 11.5
1.5 15.5
3.5 2.7
3.0 8.0
2.5 11.0
2.0 14.0
15
12
14
Head Loss (Feet w.c.) ***
Taco 0011
Taco 0013
14.1
18.2
21.3
23.9
11.4
14.8
18.3
23.0
7.5
13.5
17.0
21.5
Lynx
17.5
22.2
25.2
28.2
13.4
18.7
22.2
27.0
11.5
17.5
20.5
24.5