Powers e420 Series Combination T/P Tempering Valves - Cartridge & Trim Upgrade - Manual

The following instructions explain how to retrofit your exist-
ing 420 HydroGuard to the new, enhanced version which
utilizes a wax element and cartridge type design. The com-
bination of these design concepts results in a valve with
enhanced performance. See the exploded view of this new
assembly below:
Description
n
HydroGuard ® T/P
Series e420 - Complete Retrofit
Technical Instructions
IS-P-e420R
e420 Full upgrade kit
Figure 1
Checkstop Kit
Plug Cartridge
Assembly Wax
Element
Stem
"O"
Ring Bonnet
screw Bonnet
Assembly
Limit
Stop
Trim Plate
Kit
Handle
Kit
Kit Description
4204512 Full Upgrade Kit w/Color Trim Plate & Dome Handle
4204522 Full Upgrade Kit w/Etched Trim Plate & Dome Handle
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.
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.
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.