Watts LFN170 CSUT User Manual [en, es, fr]

ENGLISH INSTRUCTIONS

Series N170-M3 and LFN170-M3

Hot Water Master Tempering Valves

WARNING

You are required to thoroughly read all installation instructions and product safety information before beginning the installation of this product. FAILURE TO COMPLY WITH PROPER INSTALLATION AND

MAINTENANCE INSTRUCTIONS COULD RESULT IN PRODUCT FAILURE WHICH CAN CAUSE PROPERTY DAMAGE, PERSONAL INJURY AND/OR DEATH. Watts is not responsible for damages result-

ing from improper installation and/or maintenance.

Local building or plumbing codes may require modiﬁcations to the information provided. You are required to consult the local building and plumbing codes prior to installation. If this information is not consistent with local building or plumbing codes, the local codes should be followed.

Installation Instructions

Installation should be in accordance with acceptable plumbing practices. Flush all pipes thoroughly before installation. Installation and field adjustment are responsibility of the installer and shall be carried out per following installation instructions.

1. Valves are to be installed as close to building inlet supply as possible to prevent/minimize pressure fluctuations.

2. Valve body can be installed in multiple positions, see below. Make sure that the union nuts and tailpieces are tightened securely if you are using checkstops.

3. Connect inlets and outlet and check for leaks.

4. CAUTION: When N170-M3 or LFN170-M3 supplies tempered water to self-closing and/or solenoid valves, provide a shock absorber on the discharge line.

5. Before use, check discharge temperature. Reset if necessary

Temperature Adjustment

1. Turn off recirculation pump (if one is in the system).

2. Open enough fixtures to meet the minimum flow requirement of the valve.

3. Loosen the lock nut. Turn temperature adjustment screw clockwise to decrease or counterclockwise to increase outlet temperature.

NOTE: Please allow valve temperature to stabilize in before making your next adjustment. Watts recommends that a temperature gauge is installed on the tempered line and be checked at least monthly under normal flow conditions. The gauge must be installed at least 6 ft. away from the tempering valve.

4. When desired temperature is set, tighten the lock nut. Turn recirculation pump back on. Close open fixtures.

FRONT OUTLET

WARNING

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 MMV, LFMMV, USG, LFUSG, L111 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.

WARNING

Need for Periodic Inspection: Periodic inspection by a licensed contractor is recommended. Corrosive water conditions, temperatures over 210°F, unauthorized adjustments or repair could render the valve ineffective for service intended. Regular checking and cleaning of the valves internal components and checkstops helps to assure maximum life and proper product function. Frequency of cleaning depends upon local water conditions.

LFN170-M3

BACK OUTLET TOP OUTLET

IS-N170-M3

N170-M3 CSUT

Basic Installation

To Fixture

To Model

L111, LFL111, MMV or LFMMV

From Cold Supply

Thermometer

Tempered 140°F *†

ATTENTION INSTALLER: After installation,

please leave this Instruction Sheet for

occupant’s information.

Temperature

Adjusting Screw

Lock Nut

Cold

† N170-M3

or LFN170-M3

Cold

Tempering

Valve

Shutoff Valves (on both hot and cold inlets)

Minimum Flow Requirements to

for N170-M3 or LFN170-M3 Series

Valve Size gpm

⁄4" thru 2" (20-50mm) 3 to 7 (11 to 26.5 lpm)

Check Valves

(on both hot and

cold inlets)

Maintain Set Temperature

Storage

Tank

180°F

8" to 12"

Drain

CSA/ASME T&P Valve

ASME Pressure

Relief Valve

Water Heater

Hot Water Boiler

Hot

Water

NOTE: Heat trap is recommended.

† Valves listed to ASSE Standard 1016, 1069 or 1070, such as the Watts L111, LFL111, USG, LFUSG, MMV, or LFMMV should be used at point of delivery.

Speciﬁcations

• Maximum Operating Pressure ............................. 125 psig (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

* With Equal Pressure ** Low limit can not be less than the cold water temperature. For best operation, hot water should be at least 5°F (3°C)

above desire set point.

Actuator

Cold

Water

Capacity

Model Inlet / Outlet (NPT)

/4" N170-M3

/4" LFN170-M3

1" N170-M3

1" LFN170-M3

N170-M3

LFN170-M3

N170-M3

LFN170-M3

2" N170-M3

2" LFN170-M3

Model Inlet / Outlet (NPT)

/4" N170-M3 CSUT

/4" LFN170-M3 CSUT

1" N170-M3 CSUT

1" LFN170-M3 CSUT

N170-M3 CSUT

LF170-M3 CSUT

N170-M3 CSUT

LFN170-M3 CSUT

2" N170-M3 CSUT

2" LFN170-M3 CSUT

/4 x 3/4"

1 x 1"

/4 x 1-1/4"

/2 x 1-1/2"

2 x 1-

/4 x 3/4"

/4 x 1"

/4 x 1-1/4"

/4 x 1-1/2"

/2 x 2"

/4 x 2"

Flow Capacity at 50-50 mixed Less Checkstops

Pressure Drop Across Valve

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

(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

Flow Capacity at 50-50 mixed with Checkstops

Pressure Drop Across Valve

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

7 gpm

26 lpm 151 lpm 216 lpm 303 lpm 371 lpm 454 lpm 526 lpm

6.26

9.54

13.42

14.90

17.89

5psi 10psi 20psi 30psi 45psi 60psi

(34 kPa) (69 kPa) (138 kPa) (207 kPa) (310 kPa) (414 kPa)

14 gpm 20 gpm 28 gpm 34 gpm 42 gpm 48 gpm

21 gpm 30 gpm 43 gpm 52 gpm 64 gpm 74 gpm

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

Series N170-M3 and LFN170-M3 Hot Water Master Tempering Valves

Installation Instructions for A Two Temperature Recirculating Hot Water Supply System

Recirculation System 1

WATTS CSA/ASME Temperature & Pressure Relief Valve

Hot Water Supply

DrainTube

Water

Heater

Boiler

WATTS

Series N170-M3†

or LFN170-M3

Thermometer

WATTS Ball Valve

Series

MMV

WATTS

Check Valves

Tempered Water Supply

To Fixture

Cold Water Supply

To MMV, USG-B, L111 or

LFL111 then to fixtures

Cold Water

Supply

WATTS Check Valves

Aquastat

Circulator

Recirculation Loop

Series N170-M3 and LFN170-M3 Hot Water Master Tempering Valves Continued

Installation Instructions for A Two Temperature Recirculating Hot Water Supply System

IMPORTANT: Valve must be installed trapped as shown. (See reverse side for rec-

ommended minimum gpm flow requirements.)

The sketch illustrates a two-temperature (180°F and 140°F) hot water supply system with a Series N170-M3 and LFN170-M3 valve and recirculating line for maintaining approxi- mate fixture water temperatures in the mains. Because very little hot water is required to maintain the low temperature in the mains (usually 140°F), a relatively small capacity recirculator can generally be specified. The minimum flow requirements must be maintained between 3-7 gpm. Providing the heat loss from the piping is not too great (long runs of hot water piping should be insulated) standard circulators are usually adequate. However, each installation should be evaluated for its own recirculation requirements of gpm and pipe resistance.

NOTE: Recirculating control aquastat must be set at least 5°F to 10°F lower than the temperature setting of the Series N170-M3 or LFN170-M3 valve, otherwise the recirculator will run continually. Aquastat must be used to maintain water to fixtures at a desired temperature and to eliminate temperature override during no draw periods.

† Valves listed to ASSE Standard 1016, 1069 or

1070 such as the Watts L111, LFL111, USG, LFUSG, MMV or LFMMV should be used at point of delivery.

Recirculation System 2

Typical Two Temperature System with High

Temperature Hot Water Recirculation Line

To MMV, LFMMV, USG, LFUSG, L111 or LFL111 then to

fixtures

Thermometer

Aquastat

WATTS

Circulator

Hot Water Return

Aquastat

Circulator

Check Valves

Cold Water Supply

Watts Series

N170-M3†

WATTS Check

Valve

To Fixture

Cold Water Supply

MMV

High Temperature Hot Water

Tempered Water 140°

Shut

Off

Valve

WATTS Series 600

Check Valves

Note: Water Heaters may be direct or indirect fired.

8”-12”

HeatTrap†

Water Heater

or Boiler

WATTS CSA/ASME Temperature & Pressure Relief Valve

Drain Tube

Limited Warranty: Watts Regulator Co. (the “Company”) warrants each product to be free from defects in material and workmanship under normal usage for a period of one year from the date of

original shipment. In the event of such defects within the warranty period, the Company will, at its option, replace or recondition the product without charge.

THE WARRANTY SET FORTH HEREIN IS GIVEN EXPRESSLY AND IS THE ONLY WARRANTY GIVEN BY THE COMPANY WITH RESPECT TO THE PRODUCT. THE COMPANY MAKES NO OTHER WARRANTIES, EXPRESS OR IMPLIED. THE COMPANY HEREBY SPECIFICALLY DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

The remedy described in the first paragraph of this warranty shall constitute the sole and exclusive remedy for breach of warranty, and the Company shall not be responsible for any incidental, special or consequential damages, including without limitation, lost profits or the cost of repairing or replacing other property which is damaged if this product does not work properly, other costs resulting from labor charges, delays, vandalism, negligence, fouling caused by foreign material, damage from adverse water conditions, chemical, or any other circumstances over which the Company has no control. This warranty shall be invalidated by any abuse, misuse, misapplication, improper installation or improper maintenance or alteration of the product. Some States do not allow limitations on how long an implied warranty lasts, and some States do not allow the exclusion or limitation of incidental or consequential damages. Therefore the above limitations may not apply to you. This Limited Warranty gives you specific legal rights, and you may have other rights that vary from State to State. You should consult applicable state laws to determine your rights. SO FAR AS IS CONSISTENT WITH APPLICABLE STATE LAW, ANY IMPLIED WARRANTIES THAT MAY NOT BE DISCLAIMED, INCLUDING THE IMPLIED WARRANTIES OF

MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED IN DURATION TO ONE YEAR FROM THE DATE OF ORIGINAL SHIPMENT.

A Watts Water Technologies Company

USA: Tel: (978) 688-1811 • Fax: (978) 794-1848 • www.watts.com

Canada: Tel: (905) 332-4090 • Fax: (905) 332-7068 • www.wattscanada.ca

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