Tx Series Installation and Operation Instructions
│
Trinity
41
Table 10-4 Circulator and Pipe Size Requirements
Model
Temp.
Rise (ºF)
Boiler Flow
Rate (GPM)
Boiler Head
Loss (ft)
Minimum
Pipe Size
Recommended Primary Loop Pump Size
(1)
B&G
Grundfos
Taco
Armstrong
Tx51
35
2.4
7.2
¾”
NRF-22
UPS15-58 (1)
005
Astro 30 (2)
25
3.3
12
¾”
NRF-25 (3)
UPS15-58 (3)
008
Astro 50 (3)
20
4.1
16.6
¾”
NRF-36 (2)
UPS26-99 (2)
0011
E7
Tx81
35
4.2
7.4
¾”
NRF-22
UPS15-58 (2)
008
Astro 30 (3)
25
5.9
13.4
1”
NRF-36 (1)
UPS26-99 (2)
0011
Astro 50 (3)
20
7.4
20.4
1”
NRF-36 (2)
UPS26-99 (3)
0011
E7
Tx101
35
5.2
8.2
1”
NRF-22
UPS15-58 (2)
008
Astro 30 (3)
25
7.3
13.6
1”
NRF-36 (2)
UPS26-99 (2)
0011
E7
20
9.1
19.8
1”
NRF-36 (3)
UPS26-99 (3)
0011
E7
Tx151
35
7.7
11.2
1”
NRF-25 (3)
UPS26-99 (2)
0011
Astro 50 (3)
25
10.8
18.4
1-1/4”
NRF-36 (3)
UPS26-99 (3)
0011
E7
20
13.5
13.1
1-1/4”
PL-36
UPS26-116
2400-20
E8
Notes:
1
Pump sizing based on Primary/Secondary plumbing configuration with specified minimum pipe diameter with up to 50’
equivalent length.
2
Model Tx151C incorporates the circulator responsible for generating flow through the boiler, therefore sizing the
circulator for boiler flow rate is not necessary.
Figure 10-2(a) Tx51 & Tx81 Head Loss Curves
0
5
10
15
20
25
30
2
4
6
8
Flow Rate (US gpm)
H
e
a
d
L
o
s
s
(ft)
Tx51
Tx81