Lochinvar Knight 151 Installation & Operation Manual page 15

3
Hydronic piping
Figure 3-3 Pressure Drop vs. Flow
25
20
15
10
5
0
3
Table 3A Circulator Recommendations for Temperature Rise Applications_20°, 25°, and 35°
Model GPM FT/HD
151 14
211 20
286 27
These pumps are only slightly above 20° rise flows, but are the closest available. To reach a 20° rise or less, an
*NOTICE
upsized pump will be required.
Model GPM FT/HD
151 11
211 16
286 21
Model GPM FT/HD
151 8
211 11
286 15
Pumps listed in bold type are provided by the factory as the boiler circulation pump on standard altitude
NOTICE
models.
Pumps listed in italicized type are provided by the factory as the boiler circulation pump on high altitude
NOTICE
models.
The temperature rise provided by a pump/model combination will decrease by 3% per 1000 feet of elevation.
NOTICE
(continued)
Pressure Drop vs. Flow (Includes Secondary Piping)
4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
Flow Rate (GPM)
20°F Temperature Rise Applications
Minimum Pipe
Size
20 1"
29 1"
15 1-1/4"
25°F Temperature Rise Applications
Minimum Pipe
Size
13 1"
19 1"
12 1-1/4"
35°F Temperature Rise Applications
Minimum Pipe
Size
10 1"
9 1"
7 1-1/4"
Outdoor Knight Boiler Installation & Operation Manual
Grundfos TACO
UPS26-99F 0011
UPS32-160 1400-50
UPS32-80 1400-20
Grundfos TACO
UPS26-99F 0014
UPS26-99F 0013
UPS26-99F 0011
Grundfos TACO
UPS15-58FC 008/0010
UPS15-58FC 0010
UP26-64F 008/0010
151
211
286
Pump
B & G Armstrong
NRF-36
PL-55
PL-36
Pump
B & G Armstrong
NRF-36
NRF-36
NRF-36
Pump
B & G Armstrong
NRF-36
NRF-36
NRF-36
E7
E9*
E11
E7
E7
E7
Astro-30
Astro-50
E7
15