Watts WM-120-PT User manual

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Watts Pure Water Systems
WM-120-PT
Installation and Operation
Manual
Do not use with water that is microbiologically unsafe or of unknown quality without adequate
disinfection before or after the system.
RevisedOctober,2002
Watts Pure Water Inc, 1725 W. Williams Dr. C-20 Phoenix, AZ 85027
623-505-1512 Office 602-588-0356 FAX
www.wattspurewater.com
Premier Water Systems

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1.0 INTRODUCTION:
This manual contains information on the installation, operation and maintenance of Watts WM-120-PT
unit. Watts WM-120-PT has been designed for use with a pressurized storage tank. Proper installation and
maintenance will prevent costly equipment downtime.
Before installing and operating Watts WM-120-PT Reverse Osmosis Unit read the instructions carefully
and keep this manual available for future reference. Further information is available by contacting your
local Watts Distributor orWatts Pure Water in Phoenix, Arizona-U.S.A. 888-774-7405
Figure 1:
Shut off valve
Inlet ball valve
Flush ball
valve
Flow Restrictor
Note: Ball valves shown in closed position.
WM-120 Polyethylene tubing is color coded for easy installation.
a) ¼” OD Green Polyethylene tubing to be connected to a cold water feed supply.
b) ¼” OD Black Polyethylene tubing is for flushing of pre-filters and requires no connection.
c) 3/8” OD Red Polyethylene tubing is for connecting to a drain.
d) ¼” OD Blue Polyethylene tubing to be connected to a pressurized storage tank.
Make sure all Ball Valves are in the closed position until Start Up.
Watts Water Systems
25”
Mounting Holes on Center
10.7
5”
25”
2” clearance for
filter changes
14.25”
5.375”
8.50”
a
b
c
d
1
2
3
1

3
To Drain
To
equipment
Note:
Tee on bottom port
of tank.
1/4” black
tubing flush
1/4” green
tubing
Incoming
Feed
Water
Supply
Final Polishing
filter
(Ordered separately)
WM-120-PT
General plumbing layout
with
Final polishing filter
Pressure Storage
Tank
(Ordered
separately)
1/4” blue tubing
to storage tank
WM-120-PT
General plumbing layout
For use with
Steam Equipment
To drain
To
equipment
Note:
Tee on bottom port
of tank.
1/4” black
tubing Flush
1/4” green
tubing
Incoming
feed water
supply
Final Carbon Calcite
filter
(Ordered
separately)
Pressure Storage
Tank
(Ordered
separately)
1/4” blue tubing
to storage tank

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Step 1: Location
a) WM-120 to be mounted to a wall with feed
water supply, drain and storage tank within
15 ft. of location. Controller box to be
mounted within 6 ft of WM and electrical
outlet within 12 ft. Review general
plumbing layouts as references for
installation of pre-or post-treatment
equipment on page 3.
b) Mounting location should have clearance of
2 inches on both sides including; 2 inches
from the bottom of pre-filter housing for
filter changes. See figure 1, page 2.
Step 2: Mounting WM to Wall
a) The WM-120 mounting bracket has (2)
mounting keyholes that are 10.75 inches on
center.
b) The WM-120 will have an approximate
weight of 75 pounds. Caution needs to be
used when mounting unit to the wall. Use
molly bolts or self-anchoring screws with
¼” diameter heads. For sheet rock wall at
least (1) mounting screw should be located
at a wall stud.
c) The WM-bracket is designed so that if using
mounting screws with a head size of ¼” or
less in diameter, the head of the screw will
pass through the keyhole. See drawing
below) Figure 2
d) When screwing screw into wall, allow 1/16”
clearance between the screw head and the
wall. The WM-bracket will slide between
the screw head and the wall.
Step 3: Connecting to Feed water supply:
The WM may come with either a Self-Piecing
Valve, or Easy Tap Adapter.
WM-120 supplied with a Self-Piercing Valve
follow Processor A.
WM-120 supplied with an Easy Tap Adapter
follow Processor B.
Processor A
TO INSTALL SELF-PIERCING VALVE ON
COPPER TUBE
CAUTION: Do not turn handle before or while
installing (Self-Piercing Valve) be sure the
piercing lance does not protrude beyond the
rubber gasket. Failure to do this may result in
damage to the piercing needle.
a) Turn off the water supply at the location of
installation of the Self-Piercing Valve.
b) Assemble the Self-Piercing Valve on copper
tubing. For 3/8” OD tubing using Patent
Pending bracket with side projections to
prevent distortion of tubing. Use “V” side
of bracket for all larger tubing.
c) Tighten screws firmly and evenly, brackets
should be parallel.
d) Connect ¼” green tubing of the unit to the
Self-Piercing Valve as shown in figure C.
e) Turn the handle clockwise until you feel it is
firmly seated. Note: you have now pierced
the copper tube and the valve is closed.
f) Turn on the cold water supply, then turn the
handle counter-clockwise to open the self-
piercing valve.
g) Check for leaks and repair if any.
TO INSTALL SELF-PIERCING VALVE ON
STEEL OR BRASS PIPE
a) Shut-off the water supply and drain the line.
b) Drill a 3/16” (0.24 cm) hole in pipe. Use a
hand drill to avoid shock hazard.
c) Turn handle to expose lance beyond the
rubber gasket no more than 3/16” (0.24 cm).
d) Place body of valve over the hole so that the
lance fits into the hole.
BRACKET
KEYHOLE
SCREW

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e) Tighten bottom clamp evenly. (Brackets
should be parallel).
f) Turn handle clockwise to close the valve.
g) Connect ¼” green tubing from the unit to
the Self-Piercing Valve as shown in figure
C. Failure to do this before piercing the tube
will cause a small amount of water to escape
from the outlet.
h) Turn on water supply and open the tapping
valve by turning the handle counter
clockwise.
i) Check for leaks and repair if any.
Figure C
Processor B
Installing Easy Tap Adapter
Cold Water Supply Only
Easy tap adapter to be installed on ½” male pipe
thread connection before angle stop valve or onto
the faucet. Note: If your plumbing does not
allow for connection of easy tap adapter contact
your local plumbing or hardware store for
modifications.
(a) Turn off the supply water. The Easy
Tap Adapter may be installed before
angle stop valve (as shown in figure
C1), or installed at the faucet (as
shown in figure C2).
Note: Plumbing connections maybe reversed
from drawing below.
Figure C1
Figure C2
(b) Teflon tape the 1/8” male pipe thread of the
easy tap valve and screw into easy tap valve
body.
(c) Disconnect the fitting where the easy tap
valve is to be installed. Note: When
loosening or tightening fitting use
wrenches on both sides of fittings.
(d) Insert the easy tap gasket into the female
thread side of easy tap. No plumber putty or
Teflon tape is required on thread.
(e) Thread easy tap valve on to the ½” male
pipe threads and tighten securely with
wrenches. Note: Use wrenches on both
sides of the connections.
(f) Thread angle stop valve or plumbing line to
the other end of the easy adapter valve and
tighten securely using wrenches.
(g) Connect green tubing from unit to the easy
tap valve (as shown in figure C1 or C2).
(h) Turn handle clockwise making sure that
easy tap valve is in the closed position.
Brass nut
Delrin Sleeve
Brass Insert
Valve Handle
3/8” cold water line
1/4” green tubing Lance
Rubber Gasket
For water line sizes greater than 3/8”
Sink faucet
Gasket
Easy Tap
Valve
1/2” connection
plumbing from
angle stop
Brass insert
Delrin sleeve
Brass Nut
Tubing
Gaske
t
Easy
Tap
Angle
Stop
Nut
Tubin
g
Delrin
Sleeve
Brass
in
sert
Plumbing
connection
sink faucet

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Step 4: Drain Line Connection
The 3/8” OD Red Polyethylene tube from the
WM is for connecting to a drain.
If 3/8” red tubing of the WM is to be installed to
a drainpipe under a sink, an air gap device may
be required by plumbing codes.
Drain Saddle Connection
1. 3/8” OD Red Polyethylene tube is for
connecting to a drain.
2. Locate vertical drainpipe under a sink before
the p-trap.
3. Drill ¼” hole into the drainpipe that faces
the direction of WM.
4. Peel the protective film off the sponge
gasket and apply to the inside of drain
saddle, using care, to align sponge gasket
with drain saddle port.
5. Align the drain saddle with the ¼ inch hole
on the drainpipe using a drill bit or screw
driver and tighten drain saddle into place.
6. Connect the 3/8” red tubing from the WM to
the drain saddle. Make sure the 3/8”
tubing is as straight as possible.
7. When using an air gap device there can not
be any loops or dips below the connection to
the saddle drain.
Figure 4b is shown with an air gap
Floor Drain Connection
If connecting to a floor drain, install according to
local plumbing codes.
Step 5: RO Water Connection
The WM-120-PT requires a pressurized
storage tank for proper operation. Most
pressurized storage tanks have an air
pressure setting over 20 psi from tank
manufacturer. This pressure must be
reduced. The air pressure setting in a
pressurized storage tank should be checked
and set between 7 to 10 psi (when the tank is
empty of water) for correct operation of the
WM-120-PT.
The ¼” blue plastic tubing is the line the RO
water flows through from the WM-120. The ¼”
blue tubing connects to a pressurized storage
tank or post-treatment equipment depending on
the application.
NOTE: Adding ball valve before and after the
pressurized storage tank will be helpful for ease
of future maintenance.
Start-up
(a) Disconnect the ¼” blue tubing from the
pressurized storage tank or from the post-
treatment equipment that it is connected.
(b) Make sure all ball valves on the WM are in
the closed position.
(c) Open the ball valve at the flush line
connection, making sure that the ¼” black
flush line is in a pail, sink or drain. Water
will come out the tubing during start up.
(d) Turn on the incoming feed water supply to
WM and check for leaks.
(e) Open the inlet ball valve to the WM allow
air and water to purge out the flush line for
at least 5 minutes or until water run clear.
Close the ball valve on the flush line and
check for leaks.
(f) Open the ball valve feeding into the WM-
membranes. Within 2 -5 minutes RO water
will start flowing out of the ¼” blue tubing.
Allow water to flow to a drain or into a pail
for 10 minutes and check TDS reading. Best
production is normally achieved in 30 days
3/8” Red TUBING
DRAIN PIPE
DRAIN
SADDLE
Wrong No Loops
Wrong No Dips
Air Gap Device
Floor Drain
2” Air Gap

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of service, allowing membrane to “break
in”.
(g) Check for production as follows:
Using a measuring cup, or measuring device
marked in fluid ounces, measure the RO water
production for 1 minute. This will give you the
production in ounces for one minute.
(Ounces per minute X 1440 ÷ 128=gallons per 24 hours)
Water temperature and water pressure will vary
the production. See production conversion charts
on Specification Sheet.
(h) Close the ball valve feeding into the
membranes and reconnect the ¼” blue line.
(i) Open ball valve feeding into membrane and
allow unit to fill storage tank. Depending on
water temperature, water pressure and size
storage tank, the time will vary to fill the
storage tank completely. Allow 12 to 24
hours to fill tank the first time. Check for
leaks.
System Disinfecting
If System is used to supply RO drinking water
for human consumption disinfection is
recommended. System should be disinfected
at least once every 12 months.
(a) Storage tank should be completely filled
before disinfecting.
(b) Drain RO water from all post treatment
equipment at the furthest point down stream
from the storage tank. This will flush any
particles from the final filters and lines.
(c) Shut off the incoming water supply to RO
unit and close faucet down stream of RO.
(d) Remove all filter cartridges from post
treatment housings down stream of WM.
(e) Add 1 teaspoon of hydrogen peroxide to all
filter housings down stream of RO unit.
Reconnect to filter housings without the
cartridge.
(f) Add 1 teaspoon of hydrogen peroxide to
storage tank, by removing tank tee from the
storage tank or by adding hydrogen peroxide
to the line feeding into the storage tank.
(g) Turn on water supply to RO unit and allow
WM to produce water for 2 hours.
(h) If you have ball valve after the storage tank
or before the post filter housing you may
shut the RO water supply off at that point.
(i) Open faucet at the furthest point from
storage tank to depressurize Ro water lines.
Add post filter cartridge back to its filter
housings.
(j) Close faucet and open any valve that may
have been closed. Any hydrogen peroxide
still in the storage tank or lines will be
removed by the final polishing filter or will
break down to oxygen and water.
MAINTENANCE Schedule
Replacement Pre-filter for WM-120:
1st Stage: Part #WP 304003 Sed-20”-5-micron
2nd Stage: Part #WP201011 Carbonblock-20”-
5m
3rd Stage: Part #WP 201011 Carbonblock-20”-
5m
WM-120 pre-filters should be changed once
every 6 months or sooner depending on
incoming feed water conditions or when the
outlet pressure gauge form pre-filter drop
below a reading of 40 psi.
WM-120 replacement membranes:
Part #WP 110012 MEM-TFM-75 gpd
WM-120 membranes depending on water
conditions should be replaced once every 12 to
24 months.
Changing Pre-filters
1. Close the ball valve on the inlet side of
WM-120.
2. Close ball valve feeding into the RO
membranes.
3. Open flush ball valve and drain water into a
pail or drain.
4. Unscrew the blue 20” filter housing by
turning counter clockwise. Note: A filter-
housing wrench may be need.
5. Drain and remove filter cartridges from
housing. Discard used filter cartridges. DO
NOT discard filter-housing o-ring.
6. Clean filter housing with warm soapy water.
Rinse with clean water.
7. Clean and lubricate filter-housing o-ring
with K-Y Jelly or silicone. Do not use a
petroleum-based lubricant.
8. Insert new filter cartridges into the
appropriate housing.
9. Follow normal start up procedures.
Watts Pure Water

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Sales and Technical Support Department Toll free
within the United States (1-888-774-7405). Outside
the United States (623 505-1512).
Monday Thurs Friday: 8:00 AM – 5:00 PM
Mountain Standard Time
1: Incoming Feed Water ¼” Green Tubing (15 feet) 9: Membrane Feed Ball Valve Brass ¼” F
2: Elbow-Plastic ¼” C x ¼” M 90o10: Elbow-Plastic ¼” C x ¼” M 90o
3: Inlet Feed Ball Valve Brass ¼” F 11: Automatic Shut Off Valve
4: 0-100 Pressure Gauge ¼” M Bottom Mount 12: Membranes Pressure Vessel (2)
5: Filter Housing 20” Blue (3) 13: Check Valve Elbow-Plastic ¼” C x ¼” M 90o(2)
6: 0-100 Pressure Gauge ¼” M Bottom Mount 14: Flow Restrictor 850 ml
7: Flush Ball Valve-Brass ¼” F 15: Drain Line 3/8” Red Plastic Tubing (15 feet)
8: Flush Tubing ¼” Black (6 feet) 16: Permeate Line ¼” Blue Tubing (15 feet)
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