ADJUSTMENT AND SERVICE
Leonard Type TMS Thermostatic Steam and Water Mixing
Valves are simple in design and may be easily cleaned,
adjusted and repaired. If the installation is accessible, servicing
may be completed without disconnecting the valve.
NOTE:
Thermostatic Steam and Water Mixing Valves are
REGULATING
mechanisms,
which
must
be
regularly
maintained to provide best performance. Frequency of cleaning
depends on quality of local water conditions and usage. (See
Maintenance Guide and Record MGR-1000).
TO RESET ADJUSTABLE HIGH TEMPERATURE LIMIT STOP:
1.
Loosen LTR set screw.
2.
Remove SNAP CAP, SCREW & WASHER. Remove
POINTER
.
3.
Temporarily place POINTER on the spline rod. turn
RIGHT for warmer temperature, turn LEFT for cooler
temperature.
When
valve
is
delivering
warmest
temperature desired, remove the pointer.
4.
Replace POINTER on the spline rod so that its RIGHT
edge is resting against the STOP SCREW located on the
RIGHT SIDE OF THE COVER.
5.
The new maximum temperature has now been set. Test
this temperature by holding a thermometer under the
flow of water to be certain it is as desired.
TROUBLESHOOTING INSTRUCTIONS
SEE PAGE 4 FOR COMPLETE PARTS BREAKDOWN, PARTS KITS
REMEMBER! THIS IS A CONTROL DEVICE WHICH MUST BE
CLEANED
AND
MAINTAINED
ON
A
REGULAR
BASIS.
(SEE
MAINTENANCE GUIDE AND RECORD, MGR-1000).
2
POINTER
SET SCREW
LTR
STOP
SCREW
SNAP
CAP
THERMOSTATIC
LEONARD
C
H
TMS-25
TMS-50/80
TMS-125/150
PACKING &
GASKETS
PORT SLEEVE
ASSEMBLY
THERMOSTAT
GROUP
CHECKSTOPS
1. Leak at pointer rod.
2. Leak between valve cover and base.
3. Valve delivers either all hot or all cold water, or
will not mix consistently.
4. After cleaning or replacing port sleeve
assembly, valve will not hold temperature.
5. Steam bypass into cold supply.
6. Cold water bypass into steam supply.
1/50ST
TGM-1/30ST or
R/30ST
TGM-2/50 or
R/30ST
KIT 2/50 ST
1/50ST
TGM-1/50ST or
R/50ST
TGM-2/50 or
R/50ST
KIT 2/50 ST
1/125ST
TGM-1/125ST or
R/125ST
TGM-2/125 or
R/125ST
KIT 2/50 ST
!! WARNING !!
WARNING!
This Thermostatic Mixing Valve has an
adjustable high temperature limit stop, which must be
checked. If temperature is too high, the installer
MUST
RESET
this stop immediately. Always check the temperature
of the mixed water when the lever handle is turned to full
HOT.
Excessively hot water is
DANGEROUS AND MAY
CAUSE SCALDING!
THESE VALVES MAY PASS LIVE STEAM UNDER
CERTAIN CIRCUMSTANCES.
The
high
temperature
limit
stop
is
factory
set
at
approximately 140°F (60°C) with incoming steam and cold
water supply pressures of 50PSI (3.4BAR). If the incoming
steam or water supplies are different from those noted above,
the valve when turned to full hot may deliver water in excess
of 140°F and the high temperature limit stop
MUST BE
RESET BY THE INSTALLER.
IMPORTANT! Not for use with steam and water
pressures above 80 PSI (5.5 bar). The prevailing steam (or
hot water) pressure must be slightly lower than the cold
water pressure.
