NTI TFTN285 - Page 47

TFTN 085-199 Installation and Operation Manual
47
Table 10-3 Circulator and Pipe Size Requirements
Model
Temp.
Rise (°F)
Boiler Flow
Rate (GPM)
Boiler Head
Loss (ft.)
Min. Pipe
Size (in.)
Typical Primary Loop Pump Size
1
B&G
Grundfos
Taco
Armstrong
TFTN085
20
8
3.4
1
NRF-22
UPS15-58
0015-MS
Astro 30
25
6
2.7
1
NRF-22
UPS15-58
0015-MS
Astro 30
35
4
1.6
¾
NRF-22
UPS15-58
0015-MS
Astro 30
TFTN110
20
10
3.9
1
2
NRF-22
2
UPS15-58
0015-MS
Astro 30
2
25
8
3.4
1
NRF-22
UPS15-58
0015-MS
Astro 30
35
6
2.7
1
NRF-22
UPS15-58
0015-MS
Astro 30
TFTN150
20
14
5.3
1-1/4
NRF-25
UPS26-99
0015-MS
E7
25
11
3.9
1-1/4
NRF-22
UPS15-58
0015-MS
Astro 30
35
8
3.1
1
NRF-22
UPS15-58
0015-MS
Astro 30
TFTN199
20
18
7.5
1-1/2
NRF-36
UPS26-99
0013-MS
E7
25
15
5.8
1-1/4
NRF-36
UPS26-99
0013-MS
E7
35
11
3.9
1-1/4
NRF-22
UPS15-58
0015-MS
Astro 30
TFTN285
20
26
14
1-1/2
NRF-36
UPS26-99
0013-MS
E8
25
21
9.8
1-1/2
NRF-36
UPS26-99
0013-MS
E7
35
15
5.7
1-1/4
NRF-25
UPS26-99
0015-MS
E7
TFTN340
20
32
7.9
2
NRF-36
UPS26-99
0012-MS
E8
25
25
8.2
1-1/2
NRF-36
UPS26-99
0013-MS
E7
35
18
5.7
1-1/2
NRF-36
UPS26-99
0013-MS
E7
TFTN399
20
37
8.2
2
PL55
UPS26-150
2400-60
E11
25
29
5.7
2
NRF-36
UPS26-99
0012-MS
E8
35
21
3.9
1-1/2
NRF-36
UPS26-99
0013-MS
E7
Notes:
1
Pump sizing based on Primary/Secondary plumbing configuration with specified minimum pipe diameter with up to 50’
equivalent length.
2
Upsize piping to 1-1/4 in. if using Armstrong Astro 30 or B&G NRF-22; or upsize circulator to Astro 50 or NRF-25.
Figures 10-3 through 10-8 are meant to illustrate various plumbing concepts, taking into account
the boiler’s control logic – they are not meant to serve as a comprehensive guide. It is the
installer’s responsibility to use “best practices” when designing and laying out the plumbing –
including installing drain and isolation valves where required.