Watts USG-P-M1 Installation Instructions

Description
The Watts ⁄ " (10mm) compression fitting thermostatic mix ing valve
3
8
maintains and limits hot water to desired se lect able temperature
between 80°F and 120°F (27°C and 49°C) and with flow rates as low
as 0.5 gpm (1.9 lpm) and as high as 2.5 gpm (9.5 lpm). The mix ing
valve is NSF 61 Certified. The USG-P se ries uses a dou ble throt tling
de sign to con trol both the hot and cold wa ter sup ply to the mixed
outlet. The superior flow char ac ter is tics of this valve pro vides accurate
tem per a ture con trol (±3°F) with low pres sure drop. As an add ed fea-
ture, the USG-P-M1 in cor po rates dual check valves to pro tect against
cross-flow and integral screens to filter out debris. A cap is provided
for three port application.
Temperature Adjustment
1. Loosen the cap screw with the
hex wrench pro vid ed.
2. As a safety feature the cap
must be partially lifted from the
valve to adjust temperature.
3. With the faucet turned on and
in the full hot position, adjust
the setting of the valve to
obtain the desired outlet water
temperature. Turn clockwise to
decrease temperature.
4. Lower handle and tighten
screw.
5. Check outlet temperature.
Note: The hot water should be allowed to flow for two or three min-
utes prior to adjusting the valve set ting in order to have the hottest
inlet tem per a ture flow ing through the valve.
Applications
The unit is intended for under sink installation to con trol the hot water
temperature and prevent ac ci den tal scalding. The water temperature must
be ad just ed by the installer using a thermometer to mea sure the hot water
temperature at the faucet outlet. Maximum tem per a ture of 110°F (43°C) is
rec om mend ed.
Application Note
Delivery of water to fixtures intended for use in bath ing or wash ing
should always be controlled by valves listed to ASSE Stan dard 1016 or
ASSE Standard 1070 such as Watts Series USG, MMV, or L111 mix ing
valves.
These valves provide the user with both scald protection and pro tec-
tion from thermal shock. These valves should always be ad just ed after
installation to de sired temperature.
Typical Installations
The Watts Series USG-P Under Sink
Guardian installs easily onto most faucets.
• Shut off supply valves and remove
existing pip ing to faucet.
• Connect the USG-P-M1 to the supply
valves and the faucet.
• Turn on the supply valves.
USG-P-M1
Note: When using copper tubing, tubing
should not ex tend more than ⁄ " beyond
3
16
the compression fer rule.
Two Handle Faucet
Approval: NSF 61 Certified
Sensor Faucet
Spout
Sensor
Control
Module
Transformer
Cap
Watts
USG-P-M1
Solenoid Valve
Hot Supply Cold Supply
Basic Construction
Button Head Screw
Locking Adjusting Cap
Ball
O-ring
Stem
Adapter
Check Module
Thermostat
Gasket
Metal Disc
Rubber Disc
Stainless Steel
Piston
Mesh Screen
O-ring
Spring
Washer
Body
Check Module