Figure 2
Radiant Heat Application
from Boiler
Cold
Radiant Return
Mixed
to Radiant
to Boiler
Watts Flow
Check
Watts
Ball Valve
TP
Test Plug
Watts
Ball Valve
RPV
CV, CVS
Check Valve
Circulator
LF1170-M2,
LFL1170-M2
Hotter
3
/
32
" Hex Wrench
Turn
Colder
Unscrew, lift
cap to adjust
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)
1. Let water flow for at least two minutes to allow supply tem-
perature 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 coun-
terclockwise. To decrease temperature turn clockwise.
4. Lower handle and tighten screw.
5. Check outlet temperature.
Quick-Connect Installation
1. Mark pipe as shown.
This is pipe insertion depth.
2. Clean pipe end.
1. Remove collet clip.
2. Depress collet.
3. Pull tubing from tailpiece.
3. If using PEX tubing, insert pipe
stiffener (provided) into end of pipe.
4. Push tubing into tailpiece up to mark.
5. Insert collet clip.
To Connect
To Disconnect
PEX tubing only
Pipe Stiffener
Tail Piece
Mark
Collet clip
Collet depressed
1
1
/
2
in. (38.1mm)
1
3
/
4
in. (44.45mm)
1
7
/
8
in. (47.63mm)
3
/
4
in.Pipe (19.05mm)
1 in.Pipe (25.4mm)
1
/
2
in.Pipe (12.7mm)
Figure 1
Domestic Hot Water Application
Watts
Vacuum Relief
Valve
Watts Temperature
Gauge
Cold
Cold
Cold
LF1170-M2 or
LFL1170-M2
Tempered
†
Hot
Hot to
Appliances
Watts T&P
Relief Valve
*8" – 12"
H
C
M
Domestic Hot Water Application
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.