Figure 3
Temperature Adjustment
Factory Preset:
1170-M2, LF1170-M2: 120°F (49°C)
L1170-M2, 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.
Period Inspection/Maintenance
This valve requires periodic inspection and verification of the out-
let temperature by a licensed contractor. Corrosive water condi-
tions, hot inlet water temperature over 200°F (93°C), unauthor-
ized adjustments or repairs could render the valve ineffective for
its intended service. Regular cleaning and checking of thermo-
stat assembly helps to maximize valve life and mixing function.
Frequency of cleaning depends on local water conditions.
Pressure — Temperature
Minimum Supply Pressure (Static): 30psi (207 kPa)
Inlet Temperatures: hot inlet, 120°F – 200°F (49°C – 93°C),
cold inlet, 40°F – 85°F (4°C – 29°C)
Hot Water Inlet to Outlet Differential Temperature: 5°F (3°C)
1170-M2, LF1170-M2 Temperature Out:
Field range: 90°F – 160°F (32°C – 71°C), adjustable.
Accurate within ±3°F (1.7°C)
L1170-M2 and LFL1170-M2 Temperature Out:
Field range: 60°F – 120°F (16°C – 49°C), adjustable.
Accurate within ±3°F (1.7°C)
Maximum Temperature: 200°F (93°C)
Maximum Pressure: 150psi (10.3 bar)
Maximum Pressure Differential Between Hot and Cold
Water Supplies: 25%.
Approval: CSA B125 certified
Listing: ASSE 1017 and IAPMO UPC
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
1170-M2,
L1170-M2
Hotter
3/32" Hex Wrench
Turn
Colder
Unscrew, lift
cap to adjust
Watts Hot Water Temperature Control 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.
ASSE Standard 1016, ASSE 1070 listed devices such as Watts Model L111,
LFL111 Series USG, LFUSG, MMV or LFMMV should be used at fixtures
to prevent possible injury. The Watts Hot Water Temperature Control 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 1016 devices are required. These WATTS valves should never
be used to provide “anti-scald” or “anti-chill” service.
When installing the Series 1170-M2 valves in a radiant heat application, the
components of the radiant heat system must be of materials with a construction
capable of withstanding the high limit output temperatures of the heating boiler.
If you are uncertain as to the product’s adaptability for your application, please
consult an authorized representative before installing or using the product.
WARNING
!
