Install Instructions

ADJUSTMENT AND SERVICE
WARNING
This mixing valve is equipped with an adjustable high temperature limit stop factory set at approximately 120°F
(49°C) with an incoming hot water supply temperature of 150°F(65.5°C). If the hot water supply temperature of
the job is greater than 150°F(65.5°C), the valves when turned to full HOT will deliver water in excess of 120°F
(49°C) and the limit stops MUST BE RESET BY THE INSTALLER!
TO RESET ADJUSTABLE HIGH TEMPERATURE LIMIT STOP:
1. Loosen LTR Set Screw, remove POINTER SCREW.
2. Adjust POINTER to maximum desired temperature.
3. Remove POINTER, replace POINTER on spline rod with
STOP (which is cast into the underside on the pointer), resting
against the BOTTOM side of the WEB on the FINE
ADJUSTMENT SCREW.
4. If fine adjustment is needed, adjust FINE ADJUSTMENT
SCREW on the cover, loosen for hotter or tighten for cooler
temperature.
5. Replace POINTER and check temperature, if set to desired
temperature replace POINTER SCREW, and tighten LTR SET
SCREW.
6. 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.
* LIMIT STOP MUST BE RESET AND RECHECKED EACH
TIME HANDLE IS REMOVED.
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!
The high temperature limit stop is factory set at approximately
120°F (49°C) with an incoming hot water supply temperature of
150°F (65°C). If the incoming hot water on the job is higher
than 150°F (65°C), the valve when turned to full hot will deliver
water in excess of 120°F (49°C) and the high temperature limit
stop MUST BE RESET BY THE INSTALLER.
Check for significant variations in outlet flow. Thermostatic valves will NOT provide the desired accuracy outside of their flow capacity range.
Minimum flows must be no less than shown (see Flow Capacities, page 6).
If installed on a recirculated hot water system, make certain the valve is piped according to Leonard Required Piping Method #2 (see page
4).
REMEMBER! THIS IS A CONTROL DEVICE WHICH MUST BE CLEANED AND MAINTAINED ON A REGULAR BASIS. (SEE
MAINTENANCE GUIDE AND RECORD, MGR-1000).
2
WEB
ADJUSTMENT
FINE
SCREW
1017
ASSE
COLD HOT
(REST STOP AGAINST SCREW)
SET SCREW
LTR
STOP
POINTER
POINTER SCREW
Leonard Type TM Thermostatic 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 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).