Bradley Thermostatic Mixing Valve (HL 200) with Optional Cabinet
Installation and Maintenance Instructions
Model S59-3200 Series
9
Bradley Corporation • 215-1299 Rev. H; EN 06-909
1/29/07
Thermostatic Mixing Valve Troubleshooting continued . . .
Problem: Limited water flow
Cause: The stop and check sections of the valve do not
move freely.
Solution: Dirt and debris have collected on the check
screen or seat, limiting the movement of the
stop and checks. Remove the stop and checks,
clean the screen and seat and reassemble the
valve (see Figure 8). Do not remove the seat.
The components may be scraped with a screw-
driver 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 (part number S65-190).
Problem: Improper water temperature
Cause: Valve temperature is not properly set.
Solution: See "Adjust the temperature" on page 8 and
follow the step-by-step procedure.
Problem: External leaks in the system
Cause: Either the NPT joints or O-rings have been damaged.
Solution: Replace the O-rings where necessary. For
replacement of O-rings, contact your Bradley
representative and ask for O-Ring/Seal Kit (part
number S65-195).
Problem: Temperature fluctuation
Cause: Thermostat is slowly failing.
Solution: See "Check the thermostat for proper operation" on page 8 and follow the step-by-step
procedure.
Cause: Recirculation is not balanced.
Solution: See "Recirculation instructions" on page 6 and follow the step-by-step procedure.
Cause: 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 10 PSI. The supply line size may not be
large enough to supply both the valve and the other appliances.
Solution: Enlarge the supply line size, reconfigure the supply line or regulate the supply usage.
STOP AND
CHECKS
Figure 8
VALVE SEAT
VALVE
SCREEN
