Leonard Valve TM-520B-LF, TM-820B-LF, TM-920B-LF, TM-1520B-LF Installation Manual
INST ALLA TION ADJUSTMENT SERVICE
NEXT-GENERATION MANIFOLD SYSTEMS
TM-520B-LF , TM-820B-LF, TM-920B-LF, TM-1520B-LF
WARNING: This product can expose you to
chemicals including lead, which is known to the State
!
of California to cause cancer. For more information, go
to www.P65Warnings.Ca.gov
DOMESTIC OUTLET
8
0
0
6
20
1
30
0
0
0
10
4
R
LEONARD
40
0
50
-10
2
0
0
2
1
60
°C
°F
0
0
4
1
LEONARD VALVE CO.
CRANSTON RI USA
LF LF
TYP TM
US. Patents 2.970, 3,061,195 3.152,760
Bulletin G-12C
August, 2018
HOT INLET
COLD INLET
INSTALLATION
1. Type TM manifold systems are factory pre-assembled
and tested and include large and small thermostatic water
mixing valves which function as a system to meet both
high and low demand for tempered water.
2. System should be installed at a location where it can
easily be cleaned, adjusted or repaired.
3. System supplies must be connected as shown (Hot-left,
Cold-right). Exercise caution when soldering.
Maximum Operating Pressure 125 PSI (860 KPA) for Hot and Cold Water.
CAUTION
All thermostatic water mixing valves have limitations. They will not provide the desired accuracy outside of
their flow capacity range. Consult the capacity chart on page 9. Minimum flow must be no less than as
shown.
REMEMBER! THIS IS A CONTROL SYSTEM WHICH MUST BE CLEANED AND MAINTAINED ON A
REGULAR BASIS(SEE MAINTENANCE GUIDE AND RECORD MGR-1000).
1360 Elmwood Avenue, Cranston, RI 02910 USA
Phone: 401.461.1200 Fax: 401.941.5310
Email: info@leonardvalve.com
Web Site: http://www.leonardvalve.com
4. Flush pipes thoroughly after system has been connected.
5. If this assembly is installed on a recirculated hot water
system it MUST be piped according to correct piping
method see pages (4 & 5).
6. Refer to page 3 of this bulletin for correct Setup
instructions.
ADJUSTMENT AND SER VICE
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
valves.
NOTE: High Low Manifold Systems include
Thermostatic Water Mixing Valves, 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.
WARNING
These mixing valves are 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:
Serial# s starting with 52, 82, 92, 152 TM-26
LEONARD
THERMOSTATIC
H
C
POINTER
SNAP
CAP
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.
* LIMIT STOP MUST BE RESET AND RECHECKED
EACH TIME HANDLE IS REMOVED.
STOP
SCREW
LTR
SET SCREW
FINE
POINTER SCREW
POINTER
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.
ADJUSTMENT
SCREW
(REST STOP AGAINST SCREW)
LTR
SET SCREW
COLD HOT
ASSE
1017
WEB
IMPORTANT! BOTH MIXING VALVES MUST BE SET AT THE SAME
OPERATING TEMPERATURE.
SEE PAGES: 7 & 8 FOR COMPLETE PARTS BREAKDOWN
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
9).
If installed on a recirculated hot water system, make certain the valve is piped according to Leonard Required
Piping Method (see page 4 & 5).
REMEMBER! THIS IS A CONTROL DEVICE WHICH MUST BE CLEANED AND MAINTAINED
ON A REGULAR BASIS. (SEE MAINTENANCE GUIDE AND RECORD, MGR-1000).
2
SETUP INSTRUCTIONS
THERMOMETER
V2
LF LF
SMALL
VALVE
HOT
INLET
8
0
6
20
30
0
10
4
R
LEONARD
0
-10
2
0
60
°C
°F
0
1
LEONARD VALVE CO.
CRANSTON RI USA
TYP TM
US. Patents 2.970, 3,061,195 3.152,760
DOMESTIC TEMPERED
WATER
0
1
0
0
40
50
0
2
1
0
4
V1
LARGE
VALVE
COLD
INLET
1. High-low Unit MUST be piped to correct piping method
(see pages 4 &5).
2. Make sure hot and cold supplies to this assembly are
operating. The temperature of the hot water source must
be properly set and maintained.
3. The circulator (if used) must be turned OFF before setup.
4. Turn on enough fixtures for a flow of at least *
downstream from this system. Make sure each fixture is
set to deliver full “HOT” water.
*8 GPM (30 l/min.) if TM valve is a TM-50 (Serial #52)
*13 GPM (45 l/min.) if TM valve is a TM-80 (Serial #82)
*13 GPM (45 l/min.) if TM valve is a TM-90 (Serial #92)
*18 GPM (68 l/min.) if TM valve is a TM-150 (Serial #152)
5. Close outlet Valve V1 at the smaller Type
TM Valve.
*NOTE! FOR OPTIONAL OUTLET TEST CONNECTION, SEE PAGE 9.
6. Make sure valve V2 at the large Type TM Valve is in the
full open position.
7. Set outlet temperature of the large Type TM Valve to the
required level.
8. Open outlet Valve V1 at the small TM Valve.
9. Shut outlet Valve V2 at the large TM Valve.
10.Turnonenoughfixturesforaflowatleast2GPM
downstream from this system. Make sure each fixture is
set to deliver full “HOT” water.
11.Set outlet temperature of the small TM Valve to the same
temperature as step 7.
12.Open outlet Valve V2. Systemis operational.
13.IMPORTANT!! See pages 4 & 5 to balance recirculation
system.
3
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