Bradley Thermostatic Mixing Valve (HL 200) with Optional Cabinet
Model S59-3200 Series
Installation and Maintenance Instructions
8
Bradley Corporation • 215-1299 Rev. H; EN 06-909
1/29/07
Thermostatic Mixing Valve Maintenance continued . . .
Check the thermostat for proper operation
To check the valve's thermostat for proper operation,
follow the procedures outlined below.
1. Remove the top cap and pull out the push rod and
thermostat (see Figure 5 on page 7).
2. Insert a 7/16" dia. rod into the thermostat bellows.
Mark the length of the rod inside the bellows (see
Figure 7).
3. Use a marking pen to mark the thermostat bellows
length (at room temperature, with 10 lb. of force,
the bellows length should be approximately 2.6")
(see Figure 7).
4. If the thermostat bellows 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 (part number S65-194).
Adjust the temperature
To adjust the valve's temperature to other than the factory
preset, follow the procedures outlined below.
1. Turn on the water and let it run until at least 10
GPM is flowing through the valve.
2. Remove the slotted cover screw to expose the set
screw.
3. Using a 5/32" hex-head Allen key, turn the set screw
counterclockwise
to
increase
the
temperature or
clockwise
to
decrease
the temperature.
4. When the adjustment is complete, replace the cover screw and turn off the water.
Thermostatic Mixing Valve Troubleshooting
NOTE: Before attempting to troubleshoot the valve or disassemble the components, check for the
following conditions:
• make sure that the check valves are fully open (the slotted stem must be flush with the
stop/check cap) (see Figure 1 on page 3) and that all inlet and outlet shut-off valves are open
• make sure that the hot and cold inlet pipes are connected properly, and that there are no
cross-connections or leaking stop/check valves
• check the hot water heater output to make sure that it is at least 15° 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: No water flow
Cause: The thermostat has failed and subsequently, the safety shut-off has engaged.
Solution: See "Check the thermostat for proper operation" above and follow the step-by-step
procedure.
7/16"
ROD
Bellows length
should be 2-1/2"
to 2-3/4"
Figure 7
THERMOSTAT
