Installation
S19-2000, S19-2000EFX
Bradley
• 215-1291 Rev. S; ECN 17-09-009
12/7/2017
7
Problem
Cause
Solution
External leaks in the system
Either the NPT joints or the o-rings have been damaged.
Replace the NPT joints and/or o-rings where necessary. For replacement
of o-rings, contact your Bradley representative and ask for O-Ring Seal Kit
(S65-170).
No hot water flow (cold water
flow only)
The thermostat has failed and, subsequently, the safety
shut-off has engaged.
Inspect Thermostat:
1. Remove the top cap and thermostat.
2. Insert the 5/16" dia. push rod into the thermostat bellows.
3. Mark the length the push rod extends into the bellows (at room
temperature, with 10 lb. of force. the length should be approx. 15/16"
– 1-3/16").
4. If the push rod length is not in the proper range, the thermostat
must be replaced (it cannot be repaired). Contact your Bradley
representative and ask for Thermostat Kit (S65-171).
Limited water flow
The inlet shut-off valve may be partially closed or there
has been a significant decrease in water pressure.
Dirt and debris have collected on the check screen or
seat, limiting the movement of the stop and checks.
Clean Stop and check Valves:
Remove the stop and checks, clean the seat and reassemble the valve. Do
not remove the seat. The components may be brushed with a small wire
brush to remove debris. A pair of tweezers works well for pulling debris
out from the seat. If the stop and checks need to be replaced, contact your
Bradley representative and ask for Check/Stop Kit (S27-102-Rough Brass, or
S27-292A-Chrome).
Temperature fluctuation or
improper Temperature
The stop and check sections of the valve do not move
freely.
Clean Stop and Check Valves as described above.
Thermostat is slowly failing.
Check Thermostat as described above, or replace.
Inlet supply line to the mixing valve is being shared by
other pieces of equipment that are used only periodically,
such as laundry appliances or washdown stations. It may
reduce the inlet pressure to the mixing valve to less than
3 PSI. The supply line size may not be large enough to
supply both the valve and the other appliances.
Enlarge the supply line size, reconfigure the supply line or regulate the supply
usage.
Recirculation is not balanced.
Review recirculation set up on page 6.
Piston does not move freely and must be cleaned.
See next page for piston disassembly and cleaning directions.
Top Cap &
Thermostat
Thermostat
Bellows
Push Rod length
should extend
15/16"
–
1-3/16"
into Bellows
5/16" Push
Rod
Troubleshooting Thermostatic Mixing Valve
Before attempting to troubleshoot the valve or disassemble the
components, check for the following:
• Stop/check valves are fully open (the slotted stem
extends approximately 1/2" from the stem nut) and that
all inlet and outlet shut-off valves are open
• Hot and cold inlet pipes are connected properly, and
that there are no cross-connectio ns or leaking stop/
check valves
• Water heater output is at least 20° 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.
