Watts LFL1170 User Manual

Instructions Series LF1170 and LFL1170

Hot Water Temperature Control Valves

Size: 1⁄2", 3⁄4", 1"

WARNING

Read this Manual BEFORE using this equipment. Failure to read and follow all safety and use information

can result in death, serious personal injury, property damage, or damage to the equipment.

Keep this Manual for future reference.

LF1170-UT-M2

IS-1170-M2_L1170-M2

LF1170-QC-M2

WARNING

FAILURE TO COMPLY WITH PROPER INSTALLATION AND MAINTENANCE INSTRUCTIONS COULD CONTRIBUTE TO THE VALVE FAILURE.

This 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 should be used at fixtures to prevent possible injury.

These 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 valves should never be used to provide “anti-scald” or “anti-chill” service.

The components of the system must be of materials with a construction capable of withstanding the high limit output temperatures of the water heating source.

WARNING

Need for Periodic Inspection and Yearly Maintenance:

Periodic inspection and yearly maintenance by a licensed contractor is required. Corrosive water conditions, temperatures over 200°F, unauthorized adjustments or repair could render the valve ineffective for service intended. Regular checking and cleaning of the valve’s internal components and check stops helps assure maximum life and proper product function. Frequency of cleaning and inspection depends upon local water conditions.

WARNING

You are required to consult the local building and plumbing codes prior to installation. If the information in this manual is not consistent with local building or plumbing codes, the local codes should be followed. Inquire with governing authorities for additional local requirements.

Installation

WARNING

Valve should be installed and adjusted by a licensed contractor in accordance with local codes and ordinances. Further, this valve should be installed in a location where it is accessible for cleaning, service or adjustment.

1. Close both the hot and cold water shutoff valves upstream nearest to the intended installation.

2. Bleed the remaining water from the system.

3. Connect the water supply to valve as shown in Figure 1 or 2, depending on the application. Supply piping must be flushed clean before making connections to the valve.

NOTICE

To prolong the life of the Model LF1170-M2 or LFL1170-M2 valve, it is recommended that it be trapped as shown (Figure1): i.e. the hot water inlet to the LF1170-M2 valve should be 8" – 12" (200 – 305mm) below the hot water supply feed.

4. Valve can be installed in any position. Note: the inlet hot supply is to be connected to the “H” side of the valve, the cold supply side to the “C” side and the mixed water outlet to the “M” side.

5. Make sure union nuts are placed over tailpieces prior to soldering or threading to pipe.

6. For valves with Quick-Connect tailpieces refer to “QuickConnect Installation” instructions below.

NOTICE

To prevent damage to valve from excessive heat during soldering, remove unions and gaskets from valve body prior to soldering.

WARNING

Use caution when soldering. Protect yourself and others. FUMES AND GASES can be hazardous to your health. HEAT RAYS (INFRARED RADIATION) from flame or hot metal can injure eyes.

7. After soldering, flush piping and install valve using filter washer on hot and cold water inlet and fiber washer on the mixed water outlet.

8. Start-up: Open cold water supply, then hot water supply. Inspect for leaks.

9. Adjust temperature to desired setting (see Temperature Adjustment Section).

Quick-Connect Installation

To Connect

/2 in. (38.1mm)

/2 in.Pipe (12.7mm)

/4 in. (44.45mm)

/4 in.Pipe (19.05mm)

/8 in. (47.63mm)

1 in.Pipe (25.4mm)

1. Mark pipe as shown. This is pipe insertion depth.

PEX tubing only

Tail Piece

3. If using PEX tubing, insert pipe stiffener (provided) into end of pipe.

Pipe Stiffener

To Disconnect

2. Clean pipe end.

4. Push tubing into tailpiece up to mark.

5. Insert collet clip.

Collet clip

Mark

Figure 2

Radiant Heat Application

from Boiler

Watts Flow Check

Watts Ball Valve

LF1170-M2, LFL1170-M2

Test Plug

RPV

CV, CVS

Check Valve

to Boiler

Figure 3

Temperature Adjustment

Factory Preset:

LF1170-M2: 120°F (49°C) LFL1170-M2: 90°F (31°C)

Under following conditions:

Cold Inlet: 60-70°F (16-21°C) Hot Inlet: 140-145°F (60-63°C) Supply Pressure: 45psi (3.15 bar)

Watts Ball Valve

Circulator

Mixed

to Radiant

Cold

Radiant Return

1. Remove collet clip.

2. Depress collet.

3. Pull tubing from tailpiece.

Figure 1

Domestic Hot Water Application

Watts

Vacuum Relief

Valve

Watts T&P Relief Valve

Cold

Domestic Hot Water Application

Hot to

Appliances

Hot

H C

Collet depressed

Watts

Temperature

Gauge

LF1170-M2 or

LFL1170-M2

Cold

Tempered †

*8" – 12"

Turn

Hotter

Colder

Unscrew, lift

/32" Hex Wrench

cap to adjust

1. Let water flow for at least two minutes to allow supply temperature to stabilize.

2. Calibrate the mixed water outlet temperature by placing a thermometer in the mixed water stream.

3. To adjust the setting of the valve, loosen locking cap screw with hex wrench, see Figure 3. Cap must be lifted 1/4" to adjust temperature. To increase the temperature, turn counterclockwise. To decrease temperature turn clockwise.

4. Lower handle and tighten screw.

5. Check outlet temperature.

NOTICE

To prolong the life of the valve, it is recommended the valve be trapped as shown

† Devices tested to ASSE 1016, ASSE 1070 or ASSE 1069

such as Watts LFUSG, LFL111 or LFMMV should be used at fixture to prevent possible injury.

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