Watts LFN170 CSUT User Manual
For Commercial Applications
ES-LFN170-M3
Job Name
Job Location
Engineer
Approval
LEAD FREE
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*
Series LFN170
Hot Water Master Tempering Valves
Watts Series LFN170 hot water master tempering valves are
especially designed for use on larger hot water supply systems
for mixing hot and cold water for a variety of applications to
extend the hot water supply. This series uses paraffin-based
thermostat to sense and adjust outlet temperature. The
LFN170s feature Lead Free*
Free* installation requirements.
Features
• Lead Free* brass body construction
• ASSE 1017 and IAPMO CUPC Listed
• LFN170-M3 uses paraffin-based thermostat to sense and
adjust outlet temperature
• Dirt and lime resistant poppet and seat design
• Virtual shutoff if supply pressure fails
• Vandal-resistant locking mechanism to secure temperature setting
• Factory tested
construction to comply with Lead
Contractor
Approval
Contractor’s P.O. No.
Representative
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LFN170-M3
LFN170-M3 CSUT
Specifications
Maximum Operating Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125psig (861 kPa)
Maximum Hot Water Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . 200°F (93°C)
Minimum Hot Water Supply Temperature . . . . . . . . . . . . . . . . . . . . . 5°F (3°C) Above Set Point**
Temperature Adjustment Range*** . . . . . . . . . . . . . . . . . . . . . . . . . . 90 - 180°F (32 - 82°C)
Hot Water Inlet Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . 120 - 180°F (42 - 82°C)
Cold Water Inlet Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . 40 - 80°F (4 - 27°C)
Listing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ASSE 1017, IAPMO CUPC
Approval Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ASSE 1017, CSA B125.3
* The wetted surface of this product contacted by consumable water contains less than one quarter of one percent (0.25%) of lead by weight.
** With Equal Pressure
*** Low Limit cannot be less than the cold water temperature. For best operation, hot water should be at least 5°F (3°C) above desired set point.
WAR N I NG
!
Watts Hot Water Master Tempering Valves cannot be used for
tempering water temperature at fixtures. Severe bodily injury (i.e.,
scalding or chilling) and/or death may result depending upon system
water pressure changes and/or supply water temperature changes.
ASSE standard 1016, 1069 or 1070 listed devices such as Watts
Series LFMMV, LFUSG, or LFL111 valves should be used at fixtures
to prevent possible injury.
The Watts Hot Water Tempering Valves are designed to be installed at
or near the boiler or water heater. They are not designed to compensate
for system pressure fluctuations and should not be used where ASSE
standard 1016, 1069 or 1070 devices are required. These Watts valves
should never be used to provide “anti-scald” or “anti-chill” service.
Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements,
please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials without prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.
Capacity
H
G
F
J
Dimensions
Flow Capacity at 50-50 mixed Less Checkstops
P re s s u r e D r o p A c r o s s V a l v e
Model
3
/4" LFN170-M33/4 x 3/4"
Inlet / Outlet
(NPT)
1" LFN170-M3 1 x 1"
1
/4"
1
LFN170-M3
1
/2"
1
LFN170-M3
2" LFN170-M3 2 x 1-
1
1-
/4 x 1-1/4"
1
1-
/2 x 1-1/2"
1
/2 x 2"
Min. Flow
to ASSE 1017
3 gpm
11 lpm 57 lpm 79 lpm 114 lpm 140 lpm 170 lpm 197 lpm
4 gpm
15 lpm 87 lpm 121 lpm 170 lpm 212 lpm 257 lpm 299 lpm
4 gpm
15 lpm 121 lpm 170 lpm 238 lpm 288 lpm 360 lpm 416 lpm
5 gpm
19 lpm 134 lpm 185 lpm 265 lpm 326 lpm 397 lpm 458 lpm
7 gpm
26 lpm 159 lpm 223 lpm 314 lpm 386 lpm 473 lpm 545 lpm
6.70
10.13
14.16
15.65
18.63
5psi 10psi 20psi 30psi 45psi 60psi
C
V
(34 kPa) (69 kPa) (138 kPa) (207 kPa) (310 kPa) (414 kPa)
15 gpm 21 gpm 30 gpm 37 gpm 45 gpm 52 gpm
23 gpm 32 gpm 45 gpm 56 gpm 68 gpm 79 gpm
32 gpm 45 gpm 63 gpm 76 gpm 95 gpm 110 gpm
35 gpm 49 gpm 70 gpm 86 gpm 105 gpm 121 gpm
42 gpm 59 gpm 83 gpm 102 gpm 125 gpm 144 gpm
B
B
A
A
C
C
F
F
Flow Capacity at 50-50 mixed with Checkstops
P re s s u r e D r o p A c r o s s V a l v e
Model
3
/4" LFN170-M3
CSUT
1" LFN170-M3
CSUT
1
/4" LFN170-M3
1
CSUT
1
/2" LFN170-M3
1
CSUT
2" LFN170-M3
CSUT
MODEL BODY CHECK BODY DIMENSIONS WEIGHT
INLETS STOP OUTLET
NPT INLETS NPT A B C D E F G H J
3
⁄4 LFN170-M3
Inlet / Outlet
(NPT)
3
/4 x 3/4"
3
/4 x 1"
1
/4 x 1-1/4"
1-
1
/4 x 1-1/2"
1-
1
1-
3⁄4 LFN170-M3 CSUT N/A
Min. Flow
to ASSE 1017
3 gpm
11 lpm 53 lpm 76 lpm 106 lpm 129 lpm 159 lpm 182 lpm
4 gpm
15 lpm 79 lpm 114 lpm 163 lpm 197 lpm 242 lpm 280 lpm
4 gpm
15 lpm 114 lpm 159 lpm 227 lpm 280 lpm 341 lpm 394 lpm
5 gpm
19 lpm 125 lpm 128 lpm 254 lpm 310 lpm 379 lpm 435 lpm
/4 x 2"
7 gpm
26 lpm 151 lpm 216 lpm 303 lpm 371 lpm 454 lpm 526 lpm
3
⁄4 N/A 3⁄4 N/A 41⁄2 114 N/A 31⁄2 89 N/A 17⁄16 36 35⁄8 92 47⁄8 124 215⁄16 75 4.8 2.2
13.42
14.90
17.89
NPT in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm lbs. kgs.
3
⁄4 3⁄4 91⁄4 235 41⁄2 114 117⁄16 291 31⁄2 89 113⁄16 46 17⁄16 36 35⁄8 92 47⁄8 124 215⁄16 75 9.8 4.5
5psi 10psi 20psi 30psi 45psi 60psi
C
V
(34 kPa) (69 kPa) (138 kPa) (207 kPa) (310 kPa) (414 kPa)
14 gpm 20 gpm 28 gpm 34 gpm 42 gpm 48 gpm
6.26
21 gpm 30 gpm 43 gpm 52 gpm 64 gpm 74 gpm
9.54
30 gpm 42 gpm 60 gpm 74 gpm 90 gpm 104 gpm
33 gpm 47 gpm 67 gpm 82 gpm 100 gpm 115 gpm
40 gpm 57 gpm 80 gpm 98 gpm 120 gpm 139 gpm
J
J
1 LFN170-M3 1 N/A 1 N/A 49⁄16 116 N/A 31⁄2 89 N/A 17⁄16 36 35⁄8 92 47⁄8 124 215⁄16 75 4.8 2.2
1 LFN170-M3 CSUT N/A
3
⁄4 1 101⁄8 264 49⁄16 116 129⁄16 319 31⁄2 89 113⁄16 46 17⁄16 36 35⁄8 92 47⁄8 124 215⁄16 75 10.3 4.9
11⁄4 LFN170-M3 11⁄4 N/A 11⁄4 N/A 61⁄16 154 N/A 37⁄16 87 N/A 13⁄4 44 3111⁄16 94 51⁄4 133 41⁄2 114 9.4 4.3
11⁄4 LFN170-M3 CSUT N/A 11⁄4 11⁄4 121⁄16 306 61⁄16 154 151⁄16 383 37⁄16 87 21⁄2 64 13⁄4 44 3111⁄16 94 51⁄4 133 41⁄2 114 19.3 8.8
11⁄2 LFN170-M3 11⁄2 N/A 11⁄2 N/A 61⁄16 154 N/A 37⁄16 87 N/A 13⁄4 44 3111⁄16 94 51⁄4 133 41⁄2 114 9.1 4.1
11⁄2 LFN170-M3 CSUT N/A 11⁄4 11⁄2 131⁄4 337 61⁄16 154 161⁄4 413 37⁄16 87 21⁄2 64 13⁄4 44 3111⁄16 94 51⁄4 133 41⁄2 114 19.8 9.0
2 LFN170-M3 2 (Hot) 11⁄2 (Cold) N/A 2 N/A 67⁄16 164 N/A 33⁄16 81 N/A 21⁄16 52 37⁄8 98 53⁄8 137 41⁄2 114 10.4 4.7
2 LFN170-M3 CSUT N/A 11⁄4 2 133⁄4 349 67⁄16 164 163⁄4 425 33⁄16 81 21⁄2 64 21⁄16 52 37⁄8 98 53⁄8 137 41⁄2 114 21.3 9.7
Typical Specification
Master mixing valve shall feature paraffin-based, thermal actuation technology for precise temperature control. Valve shall be listed to ASSE
1017 and cUPC and shall be approved to ASSE 1017 & CSA B125.3
standards. Master mixing valve shall have an approach temperature of
5°F (3°C). Valve shall have an outlet temperature range from 90 – 180°F
(32 to 82°C) with a lockable temperature-setting feature. Valve shall be
manufactured of corrosion resistant materials and feature a single-seat
design for positive shutoff. It shall have a Lead Free* brass body. Body
shall be constructed using Lead Free* brass. Lead Free* master mixing
valves shall comply with state codes and standards, where applicable,
requiring reduced lead content. Minimum flows to ASSE 1017 shall be
3
/4 LFN170-M3 (3.0 gpm, 11 lpm), 1 LFN170-M3 (4.0 gpm, 15 lpm),
1-1/4 LFN170-M3 (4.0 gpm, 15 lpm), 1-1/2 LFN170-M3 (5.0 gpm, 19
lpm), 2 LFN170-M3 (7.0 gpm, 26 lpm).
Master mixing valves shall be of Watts Series LFN170-M3. Any alternate
must have a written approval prior to bidding.
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A Watt s Water Techn ologi es Co mpany
USA: No. Andover, MA • Tel. (978) 688-1811 • Fax: (978) 794-1848 • www.watts.com
Canada: Burlington, ONT. • Tel. (905) 332-4090 • Fax: (905) 332-7068 • www.wattscanada.ca
ES-LFN170-M3 1101 © 2011 Watts
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