Watts LFMMV User Manual

For Residential, Commercial and Institutional Applications

ES-LFMMV

Job Name

Job Location

Engineer

Approval

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LEAD FREE

Contractor

Approval

Contractor’s P.O. No.

Representative

Triple Listed!

ASSE 1017,

ASSE 1069 & ASSE 1070

Series LFMMV

Thermostatic Mixing Valves

Sizes: 1⁄2" – 1" (15 – 25mm)

Series LFMMV Thermostatic Mixing Valves maintain and limit mixed hot water to a desired, selectable temperature. The LFMMV series can be set to any temperature between 80°F and 120°F with flow rates as low as 0.5 gpm and as high as 12 gpm (refer to capacity chart on back). This mixing valve series is listed under ASSE 1017 for valves used in hot water source applications, ASSE 1069 for single-pipe, tempered water applications and ASSE 1070 for valves used in individual or multiple fixture applications and also listed IAPMO cUPC. The LFMMVs feature Lead Free* construction to comply with Lead Free* installation requirements.

The LFMMV-M1 uses a double throttling design to control both the hot and cold water supply to the mixed outlet. The superior flow characteristics of this valve provide accurate temperature control (±3°F) with low pressure drop across the rated flow range. As an added feature, the LFMMV-M1 series incorporates integral inlet filter washers and check valves in both the hot and cold water inlets to protect against cross flow.

The LFMMV-M1 is available with either union thread (-UT), union solder (-US), CPVC (-CPVC ) Quick-Connect (-QC) or PEX (-PEX) end connectors.

Features

• Lead Free* cast copper silicon alloy body construction

• Solid wax hydraulic principle thermostat assures dependable

mixing of hot and cold water

• Thermostat controls both hot and cold water

• Solder, threaded, PEX or CPVC, Quick-Connect end connection

models available

• Adjustment cap with locking feature

• ASSE 1017 listed

• ASSE 1069 listed

• ASSE 1070 listed

• IAPMO cUPC listed

• Integral filter washers and check v alves

Specifications

A Thermostatic Mixing Valve shall be installed on the hot water supply to fixture. The valve shall be ASSE 1017, ASSE 1069, ASSE 1070 and IAPMO cUPC listed. It shall have a Lead Free* cast copper silicon alloy body. Lead Free* thermostatic valves shall comply with state codes and standards, where applicable, requiring reduced lead content. The valve

shall include integral filter washers and check valves and an adjustment

cap with locking feature. The valve shall be provided with solder (-US), threaded (-UT), CPVC, (-CPVC) Quick Connect (-QC) or PEX (-PEX) union connections. The valve shall be a Watts Series LFMMV-M1.

* The wetted surface of this product contacted by consumable water

contains less than 0.25% of lead by weight.

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LFMMV-QC-M1

LFMMV-US-M1

Applications

The LFMMV-M1 Thermostatic Mixing Valves are ideal for supplying sinks, baths, showers or lavatories with tempered water. The LFMMV-M1 valves can be used in residential, commercial and institutional environments. These thermostatically modulated mixing valves can be used anywhere preset water temperature is required for point-of-use installations such as in homes, schools, restaurants, hospitals, beauty salons, and public restrooms. The LFMMV-M1 is

provided with an adjustment cap that includes a locking feature.

The LFMMV-M1 valves should be used prior to the fixture to reduce the hot water supply to a safe temperature.

WARNING

When used in an ASSE 1017 application at the hot water source, the Watts Thermostatic Mixing Valve Series LFMMV cannot be used by itself to control final temperature at fixtures where ASSE Standard 1016 or ASSE Standard 1070 listed devices are required. Such use may result in severe bodily injury (i.e. scalding or chilling) and/or death. ASSE Standard 1016, ASSE 1069 or ASSE Standard 1070 listed devices, such as Watts Series LFUSG, LFL111 or LFMMV, should be used at point-of-use to prevent possible injury. Consult all product manuals, and instruction guides before installing any referenced product.

Recirculation systems should recirculate water at temperatures over 140°F to reduce the risk of bacterial growth in the piping. This valve should not be used at the hot water source in recirculation systems.

WARNING

Water temperatures in excess 110ºF (43ºC) are dangerous and may cause scalding, severe injury or death! This valve can be adjusted to deliver water at temperatures exceeding 110ºF (43ºC). Consequently, when used in an ASSE 1016, ASSE 1069 or ASSE 1070 application, the installer must check the mixed water outlet temperature at the point of use and adjust the Watts Thermostatic Mixing Valve Series LFMMV to ensure delivery of water at a safe temperature not exceeding 110ºF (43ºC). Mechanical valves are not fail-safe. Due to the effects of various water conditions, periodic verification of outlet water temperature is required.

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.

Materials

Body: Lead Free* cast copper silicon alloy Disc: Stainless steel Thermostat Assembly: Copper O-rings: Buna-N; EPDM Pistons: Polysulfone (PSU) Springs: Stainless Steel

Pressure –– Temperature –– Flow Rate

Minimum Supply Pressure Static: 30psi (207 kPa)

Inlet Temperatures: hot inlet, 120°F – 180°F (49°C – 82°C),

cold inlet, 39°F – 85°F (4°C – 29°C)

Hot Water Inlet to Outlet Differential Temperature: 5°F (3°C) above set point

Temperature Out: Field range: 80°F – 120°F (27°C – 49°C), adjust-

able. Accurate within ±3°F (1.7°C)

Maximum Temperature: 200°F (93°C)

Maximum Pressure: 150psi (1034 kPa)

Minimum Flow: 0.5 gpm (1.9 lpm) @ 0.8psi (0.55 kPa)

Maximum Flow: 20 gpm (76 lpm) @ 125psi (862 kPa)

†

Maximum Pressure Differential between Hot & Cold Water Supplies: 25%

Listing: ASSE 1017, ASSE 1069, ASSE 1070 and IAPMO cUPC

†

When tested in accordance with ASSE 1017, ASSE 1069 & ASSE 1070.

Dimensions — Weights

Capacity**

kpa psi 345 50

276 40

207 30

138 20

Pressure Drop

69 10

0 2 4 6 8 10 12 14 gpm

7.6 15 23 30 38 46 53 lpm

Flow curves are for reference. Actual flows may vary

depending on system temperatures and/or pressures.

**Flow curve with integral inlet filters and check valves

Basic Construction

LOCKING ADJUSTMENT CAP

ADAPTER

O-RING

CHECK MODULE

BODY

TAILPIECE

INLET FILTER WASHER

UNION NUT

FIBER WASHER

Flow

BUTTON HEAD SCREW

STEM ASSEMBLY

BONNET ASSEMBLY

O-RING

SPRING

THERMOSTAT

FUNNEL

FILTER WASHER

O-RING

PLUNGER

SEAT

Hot

Water

Inlet

Cold

Water

Inlet

THREAD

(UT)

SWEAT

(US)

CPVCPEX

QUICK-CONNECT

Mixed Outlet

SIZE (DN) MODEL DIMENSIONS WEIGHT

A B C D

in. mm in. mm in. mm. in. mm in. mm lbs. kg.

1⁄2 15 47⁄8 124 57⁄16 137 33⁄16 80 5⁄8 16 1.8 0.8

⁄4 20 MMV-UT-M1 47⁄8 124 57⁄16 137 33⁄16 80 5⁄8 16 2.4 1.1

1 25 5

⁄2 15 413⁄16 123 53⁄8 137 31⁄8 80 5⁄8 15 1.7 0.8

⁄4 20 MMV-US-M1 55⁄16 135 55⁄8 143 33⁄8 86 7⁄8 22 2.3 1.0

1 25 5

⁄2 15 51⁄4 133 59⁄16 142 35⁄16 85 13⁄16 21 1.8 0.8

⁄4 20 MMV-PEX-M1 51⁄2 140 511⁄16 145 37⁄16 88 15⁄16 24 2.5 1.1

1 25 5

⁄2 15 43⁄4 121 55⁄16 136 31⁄16 79 9⁄16 14 1.6 0.7

⁄4 20 MMV-CPVC-M1 51⁄4 133 59⁄16 142 35⁄16 85 13⁄16 21 2.2 1.0

1 25 5

⁄2 15 65⁄8 168 61⁄4 159

⁄4 20 615⁄16 177 67⁄16 163 43⁄16 106 111⁄16 42 2.8 1.3

1 25 7

LFMMV-UT-M1

LFMMV-US-M1

LFMMV-PEX- M1

LFMMV-CPVC-M1

LFMMV-QC-M1

⁄16 135 55⁄8 143 33⁄8 86 3⁄4 20 3.0 1.4

⁄16 148 57⁄8 149 35⁄8 92 11⁄8 28 2.9 1.3

⁄8 149 57⁄8 150 35⁄8 93 11⁄8 29 3.1 1.4

⁄16 144 513⁄16 147 39⁄16 90 1 26 2.6 1.2

⁄8 181 61⁄2 165 41⁄4 108 13⁄4 44 3.5 1.6

4 102 11⁄2 38 2.1 0.9

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.watts.ca