Powers Process Controls e420 Installation Manual

Technical Instructions

Description n

The following instructions explain how to retrofit your exist­ing 420 HydroGuard to the new, enhanced version which
utilizes a wax element and cartridge type design. The com­bination of these design concepts results in a valve with
enhanced performance. See the exploded view of this new
assembly below:

IS-P-e420R

HydroGuard® T/P

Series e420 - Complete Retrofit

Checkstop Kit

Stem

Plug

Cartridge
Assembly

Figure 1

Kit Description

4204512 Full Upgrade Kit w/Color Trim Plate & Dome Handle

4204522 Full Upgrade Kit w/Etched Trim Plate & Dome Handle

Wax

Element

"O"
Ring

Limit

Stop

Trim Plate

Bonnet

screw

Kit

Bonnet

Assembly

Handle

Kit

Before you begin your upgrade, take the time to ensure you
have all the necessary pieces. Your retrofit kit, for each
valve, consists of the following (refer to above diagram when
taking inventory):

1. Cartridge Assembly (w/2 "O"-Rings).

2. Wax Element.

3. Bonnet Assembly.

4. Bonnet "O"-Ring.

5. Lubricant.

6. Four (4) Bonnet Screws.

7. Trim Plate Kit.

8. Handle Kit.

e420 Full upgrade kit

Disassembly:

1. Turn off hot & cold water supply-stops
(required for this retrofit).

2. Remove the handle and trim plate.

3. Remove 4 bonnet screws and bonnet assembly.

4. Remove all internal components from valve body.

5. Remove hot water seat using 7/8" hex socket if
retrofit from 420 valve.

6. At this point you should have an empty valve body.
You are now ready to put the new components into
your existing valve.

Reassembly:

1. Ensure the inside of the valve body is free of deposits and
debris. Clean as necessary.

2. Push the cartridge into the body without the "O"-rings installed.
The cartridge should slide in easily, and bottom out with its
large fins just inside the front surface of the casting. If the
cartridge is difficult to install, or does not go in all the way,
remove the cartridge and clean the body or remove any
obstructions. Repeat this step until the cartridge installs easily.

3. Remove the cartridge and install the 2 "O"-rings. Lubricate the
"O"-rings with silicon lubricant.

4. Install the cartridge back into the body. The cartridge should
go in until the large fins are just inside the front surface of the
casting (same position as in Step 2). If you cannot push it in
all the way due to "O"-rings, use bonnet and two (2) screws to
force in. When using bonnet screws, be sure to use a diagonal
direction to ensure cartridge seats in the body evenly.

5. Lubricate the bonnet "O"-ring and install into
new bonnet assembly.

After you verify that you have everything needed to complete
the retrofit, proceed with the next section.

Retrofit:

Follow the instructions below to perform your retrofit. Save
all components until you have successfully completed your
retrofit.

6. Place the wax element into the stem assembly, small end
first, and place this bonnet-stem-motor assembly into/onto
the valve body. Rotate the bonnet assembly to line up the
bonnet screw holes and reinstall and tighten the four
bonnet screws.

See cutaway below to see how everything goes together.
(Figure 3)

7. Rotate the stem assembly clockwise, by hand, until it
bottoms out on the cartridge. At this point your valve is
in the off position.

8. Turn the hot and cold water supplies back on and verify there
is no leakage. If the valve leaks disassemble and
go back to step #1 and reassemble.

Figure 3

Cold Water Supply

Shuttle

Adjustment

Stem

Advanced Thermal

Actuator

Cartridge Assembly

W A R N I N G

!

FAILURE TO COMPLY WITH PROPER INSTALLATION

AND MAINTENANCE INSTRUCTIONS COULD
CONTRIBUTE TO THE VALVE FAILURE, RESULTING IN
INJURY. TO ENSURE THE ACCURATE AND RELIABLE
OPERATION OF THIS PRODUCT, IT IS ESSENTIAL TO:

• Properly size each valve based on the individual appli­cation.

• Properly design the recirculation system to minimize
pressure and temperature variations.

• Conduct an annual maintenance program to ensure
proper operation of all critical components.

• Check outlet temperature to ensure it does not exceed
105°F (41°C). Make sure temperature limit stop is
properly re-set to maximum 105°F (41°C) following
valve maintenance or repair. Tampering with limit
stop in any way may result in scalding temperature
causing serious bodily harm.

Periodic Inspection: Corrosive water conditions, tem-

peratures over 210°F, unauthorized adjustments or
repair could render the valve ineffective for the service
intended. Regular checking and cleaning of the valve’s
internal components helps assure maximum life and
proper product function.

10. Your valve should now be set properly. Verify proper
operation by rotating the stem from the off position,
counterclockwise, to the high temperature position.
Verify the temperature does not exceed your desired
maximum temperature. Rotate stem back to the
off position.

11. Peel off backing of dial gasket and attach it to the inside top
edge of dial plate. Make sure gasket is approximately
1/16" beyond the plate edge.

12. Hold plate firmly against the wall. Thread sleeve on the
bonnet making sure that the cut away on the sleeve is
facing out and is in the bottom position when tightened.
Do not use any tool which will scratch the sleeve surface.

13. Install handle with the screw provided on to the stem and
tighten in place. Ensure the set screw lines up with the
groove on the adjustment stem.

Hot Water Supply

9. Maximum Temperature Setting

ATTENTION INSTALLER: After installation, please leave this
Instruction Sheet for occupant’s information.
IMPORTANT: Inquire with governing authorities for local
installation requirements.

Maximum temperature setting adjustment (Figure 3) must be set
on the job. The high temperature limit stop is threaded into the
bonnet and is turned counter clockwise for a decreased set­ting. Powers recommends a maximum setting of 105°F (41°C).
To adjust temperature, rotate handle to the maximum desired
outlet temperature, screw temperature limit stop until it touches
stem’s shoulder. Close valve and open it to verify setting.

Warranty n

The Seller warrants that the equipment manufactured by it and covered by this order or contract is free from defects in material and workmanship and, without
charge, equipment found to be defective in material or workmanship will be repaired, or at Seller’s option replaced F.O.B. original point of shipment, if written
notice of failure is received by Seller within one (1) year after date of shipment (unless specifically noted elsewhere), provided said equipment has been properly
installed, operated in accordance with the Seller’s instructions, and provided such defects are not due to abuse or decomposition by chemical or galvanic action.
THIS EXPRESS WARRANTY IS IN LIEU OF AND EXCLUDES ALL OTHER WARRANTIES, GUARANTEES, OR REPRESENTATIONS, EXPRESS OF IMPLIED. THERE ARE
NO IMPLIED WARRANTIES OF MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR PURPOSE. The Seller assumes no responsibility for repairs made on the
Seller’s equipment unless done by the Seller’s authorized personnel, or by written authority from the Seller. The Seller makes no guarantee with respect to material
not manufactured by it.

A Watts Water Technologies C ompany

IS-P-e420R 1045 EDP#6512298 © 2010 Powers

USA:  Phone: [phone] • Fax [phone] • www.powerscontrols.com

Canada:  Phone: [phone] • Fax 1. 888 . 479. 2887 • www.powerscontrols.ca