Capacity, Recirculation system 1 – Watts LFN170 CSUT User Manual
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Flow Capacity at 50-50 mixed with Checkstops
P r e s s u r e D r o p A c r o s s V a l v e
Model
Inlet / Outlet (NPT)
Min. Flow
C
V
5psi
10psi
20psi
30psi
45psi
60psi
to ASSE 1017
(34 kPa)
(69 kPa)
(138 kPa)
(207 kPa)
(310 kPa) (414 kPa)
3
/
4"
N170-M3 CSUT
3
/
4"
LFN170-M3 CSUT
3
/
4
x
3
/
4
"
3 gpm
6.26
14 gpm
20 gpm
28 gpm
34 gpm
42 gpm
48 gpm
11 lpm
53 lpm
76 lpm
106 lpm
129 lpm
159 lpm
182 lpm
1" N170-M3 CSUT
1" LFN170-M3 CSUT
3
/
4
x 1"
4 gpm
9.54
21 gpm
30 gpm
43 gpm
52 gpm
64 gpm
74 gpm
15 lpm
79 lpm
114 lpm
163 lpm
197 lpm
242 lpm
280 lpm
1
1
/
4"
N170-M3 CSUT
1
1
/
4"
LF170-M3 CSUT
1-
1
/
4
x 1-
1
/
4
"
4 gpm
13.42
30 gpm
42 gpm
60 gpm
74 gpm
90 gpm
104 gpm
15 lpm
114 lpm
159 lpm
227 lpm
280 lpm
341 lpm
394 lpm
1
1
/
2"
N170-M3 CSUT
1
1
/
2"
LFN170-M3 CSUT
1-
1
/
4
x 1-
1
/
2
"
5 gpm
14.90
33 gpm
47 gpm
67 gpm
82 gpm
100 gpm
115 gpm
19 lpm
125 lpm
128 lpm
254 lpm
310 lpm
379 lpm
435 lpm
2" N170-M3 CSUT
2" LFN170-M3 CSUT
1-
1
/
4
x 2"
7 gpm
17.89
40 gpm
57 gpm
80 gpm
98 gpm
120 gpm
139 gpm
26 lpm
151 lpm
216 lpm
303 lpm
371 lpm
454 lpm
526 lpm
Flow Capacity at 50-50 mixed Less Checkstops
P r e s s u r e D r o p A c r o s s V a l v e
Model
Inlet / Outlet (NPT)
Min. Flow
C
V
5psi
10psi
20psi
30psi
45psi
60psi
to ASSE 1017
(34 kPa)
(69 kPa)
(138 kPa)
(207 kPa)
(310 kPa) (414 kPa)
3
/
4"
N170-M3
3
/
4"
LFN170-M3
3
/
4
x
3
/
4
"
3 gpm
6.70
15 gpm
21 gpm
30 gpm
37 gpm
45 gpm
52 gpm
11 lpm
57 lpm
79 lpm
114 lpm
140 lpm
170 lpm
197 lpm
1" N170-M3
1" LFN170-M3
1 x 1"
4 gpm
10.13
23 gpm
32 gpm
45 gpm
56 gpm
68 gpm
79 gpm
15 lpm
87 lpm
121 lpm
170 lpm
212 lpm
257 lpm
299 lpm
1
1
/
4"
N170-M3
1
1
/
4"
LFN170-M3
1-
1
/
4
x 1-
1
/
4
"
4 gpm
14.16
32 gpm
45 gpm
63 gpm
76 gpm
95 gpm
110 gpm
15 lpm
121 lpm
170 lpm
238 lpm
288 lpm
360 lpm
416 lpm
1
1
/
2"
N170-M3
1
1
/
2"
LFN170-M3
1-
1
/
2
x 1-
1
/
2
"
5 gpm
15.65
35 gpm
49 gpm
70 gpm
86 gpm
105 gpm
121 gpm
19 lpm
134 lpm
185 lpm
265 lpm
326 lpm
397 lpm
458 lpm
2" N170-M3
2" LFN170-M3
2 x 1-
1
/
2
x 2"
7 gpm
18.63
42 gpm
59 gpm
83 gpm
102 gpm
125 gpm
144 gpm
26 lpm
159 lpm
223 lpm
314 lpm
386 lpm
473 lpm
545 lpm
Capacity
Recirculation Loop
Water
Heater
or
Boiler
WATTS
Check
Valves
WATTS CSA/ASME
Temperature &
Pressure Relief Valve
To MMV, USG-B, L111 or
LFL111 then to fixtures
WATTS
Check
Valves
Circulator
WATTS
Ball
Valve
WATTS
Series N170-M3†
or LFN170-M3
Series
MMV
Hot Water Supply
Tempered Water Supply
Cold Water
Supply
To Fixture
Recirculation System 1
Thermometer
DrainTube
Aquastat
Cold Water Supply
Series N170-M3 and LFN170-M3
Hot Water Master Tempering Valves
Installation Instructions for
A Two Temperature Recirculating Hot Water Supply System