Watts LF223 series Installation Instructions

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.
Installation Instructions
• This valve should be installed where it is accessible with sufficient
clearance for cleaning, service or adjustment.
• Flush dirt and scale from supply pipe.
• You may install the regulator vertically or horizontally, but you
must install it with the arrow in the direction of flow.
• Regulator is preset at 50psi (345 kPa). To adjust, loosen locknut
and turn adjusting screw clockwise to increase pressure; counter-
clockwise to decrease.
• The LF223 has a built-in thermal expansion bypass. If using the
LF223 model when the inlet pressure is higher than the discharge
setting of the water heater T&P valve (typically 150psi, 10.3 bar),
or when there is a check valve or backflow preventer installed on
the line, you must make provisions for pressure relief protection to
protect your plumbing system and its components. We suggest
the use of a model DET expansion tank, the Watts Governor 80
ball cock and thermal expansion relief valve, or a 530C calibrated
pressure relief valve. (Send for folder F-RV, S-Therm Expansion,
or consult your plumbing professional).
CAUTION
!
Any time a reducing valve is adjusted, the use of a pressure gauge
is recommended to verify correct pressure setting. Do not bottom
out adjusting screw on spring cage.
Main Line Service
Install in tandem with smaller size regulator to improve system
performance and extend valve life.
Cold Water Supply
➤
Recommended to use
two PRV's to reduce
pressure more than
a 10:1 ratio.
To Sill Cock
From Street Main
➤
Reducing Valve
Meter
Install Horizontally
or Vertically
Maintenance Instructions
• To clean or replace parts; shut off supply, loosen lock-nut and back
off adjusting screw.
• Remove spring cage, spring, washer.
Remove bottom plug.
• Disassemble module. Use wrench to loosen stem nut and remove
lock washer and diaphragm plate. Remove yoke by loosening disc
holder using a screw driver.
• When replacing disc holder, apply a drop of low strength thread lock.
Do not over torque.
NOTICE
When furnished with a strainer, flush periodically.
Adjusting Screw
Lock Nut
Spring Washer
Spring
Spring Cage
Stem Nut & Lock Washer
Diaphragm
Diaphragm Plate
Seat
Seat Gasket (except 1 ⁄ ", 3 ⁄ " old style)
2 4
(except ⁄ ", ⁄ " old style)
1 3
2 4
Disc
Disc Screw
Disc Holder
Bottom Plug Gasket
Bottom plug
Repair Kits
Kit for No. LF223 includes parts shown
Ordering Kit No. Valve Size
Code No. Series
In. mm
0125123 LFKIT-C-RK 1 ⁄ , 3 ⁄ 15, 20
2 4
0125124 LFKIT-D-RK 1 25
0125125 LFKIT-E-RK 1 1 ⁄ 32
4
LF223
0125369 1 1 ⁄ RK LF223N 1 1 ⁄ 40
2 2
0125370 2 RK LF223N 2 50
0125371 2 1 ⁄ RK LF223N 2 1 ⁄ 65
2 2
0009909 2 ⁄ LFRK-223 LFN223B 2 ⁄ 3 Bronze 65, 80
1 1
2 2,
0125372 2 ⁄ RK LFN223M2 LFN223BM1 2 ⁄ Bronze 65
1 1
2 2
NOTICE
When ordering, specify Ordering Code Number, Kit Number and Valve Size.
WARNING
!
Conduct a thorough inspection of the valve for external leaks after the "final''
installation of the regulator.