Leonard Valve TM-520B-LF, TM-820B-LF, TM-920B-LF, TM-1520B-LF Installation Manual

Bulletin G-12C

August, 2018

INSTALLATION 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

	100
	20
	LEONARD VALVE CO.
	CRANSTON RI USA
LF	LF

						HOT INLET COLD INLET
				INSTALLATION
1.	Type TM manifold systems are factory pre-assembled				4.	Flush pipes thoroughly after system has been connected.
	and tested and include large and small thermostatic water
	mixing valves which function as a system to meet both				5.	If this assembly is installed on a recirculated hot water
	high and low demand for tempered water.
						system it MUST be piped according to correct piping
2.	System should be installed at a location where it can					method see pages (4 & 5).
	easily be cleaned, adjusted or repaired.				6.	Refer to page 3 of this bulletin for correct Setup
3.	System supplies must be connected as shown (Hot-left,					instructions.
	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: [phone] Fax: [phone]

Email: [e-mail]

Web Site: http://www.leonardvalve.com

ADJUSTMENT AND SERVICE

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

		LEONARD
		THERMOSTATIC
	C	H
POINTER			STOP
			SCREW
		SNAP	LTR
			SET SCREW
		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.

			TM-26	COLD HOT
			FINE
	POINTER SCREW		ADJUSTMENT
			SCREW
	POINTER		WEB
			(REST STOP AGAINST SCREW)
	STOP	LTR
		SET SCREW

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.

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).

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SETUP INSTRUCTIONS

THERMOMETER

60

DOMESTIC TEMPERED

WATER

80

40

0

20 30 10

LEONARD

1 0 0

40

2 0

50

-10

°C 60

0	°F
	140

120

V1

V2

LARGE

VALVE

LEONARD VALVE CO.

CRANSTON RI USA

LF

TYP TM

LF

SMALL

VALVE

	HOT	COLD
	INLET
		INLET

	1.	High-low Unit MUST be piped to correct piping method	6.	Make sure valve V2 at the large Type TM Valve is in the
		(see pages 4 &5).		full open position.
	2.	Make sure hot and cold supplies to this assembly are	7.	Set outlet temperature of the large Type TM Valve to the
		operating. The temperature of the hot water source must		required level.
		be properly set and maintained.
	3.	The circulator (if used) must be turned OFF before setup.	8. Open outlet Valve V1 at the small TM Valve.
	4.	Turn on enough fixtures for a flow of at least *	9. Shut outlet Valve V2 at the large TM Valve.
		downstream from this system. Make sure each fixture is	10.Turn on enough fixtures for a flow at least 2 GPM
		set to deliver full “HOT” water.
				downstream from this system. Make sure each fixture is
	*8 GPM (30 l/min.) if TM valve is a TM-50 (Serial #52)			set to deliver full “HOT” water.
	*13 GPM (45 l/min.) if TM valve is a TM-80 (Serial #82)		11.Set outlet temperature of the small TM Valve to the same
	*13 GPM (45 l/min.) if TM valve is a TM-90 (Serial #92)			temperature as step 7.
	*18 GPM (68 l/min.) if TM valve is a TM-150 (Serial #152)		12.Open outlet Valve V2. System is operational.
	5.	Close outlet Valve V1 at the smaller Type
		TM Valve.	13.IMPORTANT!! See pages 4 & 5 to balance recirculation
				system.

*NOTE! FOR OPTIONAL OUTLET TEST CONNECTION, SEE PAGE 9.

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