Powers e420 Series Combination T/P Tempering Valves - Cartridge (420-451) - Manual

HydroGuard ® T/P Series e420
Complete Retrofit
Technical Instructions
IS-P-420R
!
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.
WARNING
Need for Periodic Inspection/Maintenance: This product
must be tested periodically in compliance with local codes,
but at least once per year or more as service conditions
warrant. All products must be retested once maintenance
has been performed. Corrosive water conditions, inlet tem-
peratures over 200°F (93°C), and/or unauthorized adjustments
or repair could render the product ineffective for the service
intended. Regular checking and cleaning of the product’s
internal components helps assure maximum life and proper
product function.
WARNING !
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. Spline Temperature Limit Stop (2 pieces).
5. Bonnet “O”-Ring.
6. Lubricant.
7. Four (4) Bonnet Screws.
After you verify that you have everything needed to complete the
retrofit, proceed with the next section.
Follow the instructions below to perform your retrofit. Save all com-
ponents until you have successfully completed your retrofit.
Retrofit
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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.
6. At this point you should have an empty valve body.
You are now ready to put the new components into your existing
valve.
Disassembly
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Figure 2
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:
420 Retrofit Instructions
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Figure 1
420-451 KIT
Reassembly
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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