Watts L111 - Manual

Watts Model L111
Thermostatic Mixing Valve
Installation Instructions
Valve should be installed by a licensed contractor in
accordance with local codes and ordinances.
A. Mounting the Valve*
1. Remove cover screw using the Allen wrench supplied.
2. Remove the tamper-proof cover.
3. Secure the L111 valve body to the wall using four #10
screws.
* Valve should be installed in a location where it is
accessible for cleaning, service, or adjustment.
NOTE: Allow sufficient clearance to remove tamper-proof cover.
B. Piping**
1. Close both the hot and cold water supply shutoff valves
upstream of the intended installation.
2. Bleed the remaining water from the system.
3. Connect the water supply to the L111 valve as shown
in Fig. 1. Supply piping must be flushed clean before
making connections to the valve.
4. Install Watts Series CS-U combination shutoff/check
valve/strainer or separate check valve, strainers and
shutoff valves upstream of the L111 or to facilitate ser-
vicing and temperature adjustment of the valve.
5. Start Up — Open cold water supply then hot water
supply. Inspect for leaks.
Hot W ater
Supply
Cold W ater
Suppl y
Hot Supply
Watts 1170
or LF1170
or N170 or
LFN170
mixing valve
(optional)
Isolation
Ball V alve
(optional)
Isolation
Ball V alve
Check
V alve
Strainer
Alternate
Piping
Ho t
To Fixture
L111 Cold
Model CS-U
(2 Plcs)
Hot
To Fixture
Cold
Model CS-U
(2 Plcs)
Isolation
Ball Va lv e
(optional)
L111
Fig.1 Typical System Piping.
* See insets A & B on reverse side for details.
IS-L111
IMPORTANT: This valve must be maintained on a regular basis.
Please see reverse side for instructions.
CAUTION: Do not use this valve on systems using a recirculation
device. Systems that use recirculation to maintain selected water
temperature in supply piping must incorporate master mixing
valves such as the Watts Series 1170, LF1170, N170, or LFN170.
** Attach the piping as follows:
Red label — hot water inlet;
Blue label — cold water inlet;
White label — mixed water
outlet.
* *
ASSE 1069 & 1070 Listed
This valve can be adjusted to deliver water at temperatures exceeding 110°F
(43°C). Consequently, after installing the Watts L111 Thermostatic Mixing Valve,
you should always check the outlet water temperature and adjust the valve
to ensure delivery of water at a safe temperature not exceeding 110°F (43°C).
Further, check valves and strainers must be installed in the hot and cold water
supply lines to this valve. Mechanical valves are not failsafe. Due to the effects of
various water conditions, periodic verification of water temperature is required.
Water Temperatures in Excess of 110°F (43°C) Are Dangerous and May Cause
Scalding, Severe Injury or Death!
This valve is not factory pre-set. To deliver the desired mixed water temperature at
the outlet the installer must adjust and verify the temperature at the outlet.
IMPORTANT
WARNING !