Thermosatic Mixing Valve Toubleshooting - Bradley Terreon 54 Manual Del Usario

TDB3108, WF3208
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 O-rings .
Improper water Thermostat is slowly failing or not working at all .
temperature or
temperature
fluctuation .
Valve temperature is not properly set .
Limited water flow . Dirt and debris have built up in the valve or strainer .
24
Cause
4/30/2013
Solution
Replace O-rings where necessary . For replacement of the
O-rings, contact your Bradley representative and ask for
Repair Kit (part number S65-259) .
Check the thermostat for proper operation .
1 . At room temperature (80° F or less) remove cap
and thermostat .
2 . Place thermostat into container with 115° F water .
The pushrod should pop out of the thermostat
approximately 1/10" .
3 . If thermostat pushrod does not pop out, the
thermostat must be replaced . Contact your Bradley
representative and ask for Repair Kit (part number
S65-259) .
Adjust the temperature as shown on page 16, step 7 .
Remove and clean strainer . If strainer needs to be
replaced, order Bradley part no . 173-028 .
Check the piston for smooth movement .
1 . Remove the valve's cap and thermostat .
2 . Push down on the piston with your finger (the piston
should move freely) . If the movement is not as it
should be, the piston needs to be cleaned . Follow
the method outlined below for cleaning the piston
and valve body:
• Remove the thermostat .
• Lift the piston out with a needle-nose pliers
and remove the spring .
• Any cleaner suitable for brass and stainless
steel may be used (if cleaning with suitable
cleaner is not sufficient to remove debris, a
400-grit sandpaper may be used to polish and
hone the piston and valve body) .
• Snap spring into piston (will detent) and
reassemble into the valve body . Retest the
piston .
3 . If, after a thorough cleaning, the piston does not
move freely, the piston must be replaced . Contact
your Bradley representative and ask for Repair Kit
(part number S65-259) .
Bradley • 215-1187 Rev. P; ECN 13-00-001
Installation