NTI Trinity TX Series Installation And Operation Manual page 40

Boiler and Heating System Piping
Table 10-4 Circulator and Pipe Size Requirements
Temp. Boiler Flow
Model
Rise (ºF) Rate (GPM)
35 2.4
Tx51 25 3.3
20 4.1
35 4.2
Tx81 25 5.9
20 7.4
35 5.2
Tx101 25 7.3
20 9.1
35 7.7
2
Tx151 25 10.8
20 13.5
35 10.2
2
Tx200 25 14.3
20 17.9
Notes:
1 Pump sizing based on Primary/Secondary plumbing configuration with specified minimum pipe diameter with up to 50'
equivalent length.
2
Models Tx151C and Tx200C incorporate the circulator responsible for generating flow through the boiler, therefore
sizing the circulator for boiler flow rate is not necessary.
3
The amperage draw of circulator models PL-55, UPS26-150, 2400-45 and E21 exceed the switching capacity of the
boiler pump contacts, an isolation relay must be utilized.
30
25
20
15
10
5
0
2
40
│
Boiler Head Minimum
Loss (ft) Pipe Size
¾"
7.2
¾"
12
¾"
16.6
¾"
7.4
1"
13.4
1"
20.4
1"
8.2
1"
13.6
1"
19.8
1"
11.2
18.4 1-1/4"
23.2 1-1/4"
10 1-1/4"
20 1-1/4"
29.7 1-1/2"
Figure 10-3(a) Tx51 & Tx81 Head Loss Curves
Tx51
Tx81
4
Flow Rate (US gpm)
Recommended Primary Loop Pump Size
B&G Grundfos
NRF-22 UPS15-58
NRF-25 UPS15-58
NRF-36 UPS26-99
NRF-22 UPS15-58
NRF-36 UPS26-99
NRF-36 UPS26-99
NRF-22 UPS15-58
NRF-36 UPS26-99
NRF-36 UPS26-99
NRF-25 UPS26-99
NRF-36 UPS26-99
PL-36 UPS26-99
NRF-25 UPS26-99
NRF-36 UPS26-99
3 3
PL-55 UPS26-150
6
Tx I&O Manual
(1)
Taco Armstrong
0015-MS Astro 30 (2)
0015-MS Astro 50 (3)
0015-MS E7
0015-MS Astro 30 (3)
0015-MS Astro 50 (3)
0013-MS E7
0015-MS Astro 30 (3)
0013-MS E7
0013-MS E7
0015-MS Astro 50 (3)
0013-MS E7
2400-20 E8
0015-MS Astro 50 (3)
0013-MS E9
3 3
2400-45 E21
8