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Idiomas disponibles
SN2003/AST4, SN2003/AST4-F, SN2023/AST4
Thermostatic Mixing Valve Troubleshooting
Before attempting to troubleshoot the valve or disassemble the components, check for the following
conditions:
• If stop valves are used, make sure that they are fully open.
• Make sure that the hot and cold inlet pipes are connected properly, and that there are no cross-
connections or leaking stop valves.
• Check the hot water heater output to make sure that it is at least 10° F above the set temperature.
Be sure to close the appropriate shut-off valves prior to disassembly of the valve and reopen the valves after inspection
and repair is complete.
Problem
External leaks .
Damaged cartridge or O-rings .
Improper water
Hot water supply is not 10° above desired set point .
temperature or
temperature
Valve temperature is not properly set .
fluctuation .
Limited water flow . Dirt and debris have built up in the valve or strainer .
1
2
3
4
5
10
Cause
5
4
7
6
8/24/2020
Replace cartridge with part number 269-1927
Increase hot water supply temperature
Adjust the temperature as shown on page 6, step 4 .
1 . Check to make sure both hot and cold supplies are
connected to the Navigator mixing valve and that
they have water flow .
2 . Remove cover and U-clip . Remove the cartridge
and clean the strainer . It is not required to grease
cartridge, however if desired, use silicone grease
only . Do not use grease on check valves .
Parts List
Item
Part No.
1
160-463
Cap Screw
2
107-582
Cover
3
269-1927
Thermostatic Cartridge
4
198-014
Check Valve*
5
132-051
Retaining Ring*
6
118-319
Valve Body
7
146-079
U-Clip
* Included with Prepack S65-326
Tempered Line Adapter Option
Part no. S39-804
(replaces S59-4000 if tempered
line is used)
Strainer
(173-028)
Bradley • 215-1072 Rev. L: ECO 20-00-015
Solution
Quantity
Description
S59-4000
1
1
1
2
2
1
1
Installation
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