Leonard TM-2020B-3PS User Manual

Bulletin G-11N3
August, 2018
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
INSTALLATION ADJUSTMENT SERVICE
TM-2020B-3PS, TM2020B-3PS-LF
PARALLEL SYSTEMS
IMPORTANT! Provide serial numbers for both valves when ordering parts!!
Small valve manufactured after July 2007 starting with serial # TM26272
INSTALLATION
1. Type TM Parallel 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.
4. Flush pipes thoroughly after system has been
connected.
5. Assemblies installed on a recirculated hot water system
MUST be piped according to LEONARD’S
REQUIRED PIPING METHOD #5 (see page 4).
6. Refer to page 3 of this bulletin for correct Setup
Instructions.
Maximum Operating Pressure 125PSI (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 8. Minimum
flow must be no less than as shown.
TM-2020B-3P
0
2
0
4
0
50
60
°C
1
2
0
-10
1
4
0
°F
0
20
8
0
30
6
0
40
R
LEONARD
10
1
0
0
49
1
2
"
LEONARD
THERMOSTATIC
C
H
ASSE
1017
LEONARD
THERMOSTATIC
C
H
ASSE
1017
LEONARD
THERMOSTATIC
C
H
ASSE
1017
47"
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
!

Leonard TM-2020B-3PS Specifications

General

Brand	Leonard
Model	TM-2020B-3PS
Category	Control Unit
Language	English

Summary

INSTALLATION AND SETUP

Safety Warnings and Precautions

Covers chemical exposure warnings (Prop 65) and general cautions about valve limitations.

System Description and Requirements

Details the pre-assembled parallel systems, installation location, connection, and flushing steps.

Piping and Setup References

References specific piping methods (page 4) and setup instructions (page 3).

ADJUSTMENT AND SERVICE

Serviceability and Maintenance

Notes valves are serviceable without disconnection and highlights the need for regular maintenance.

High Temperature Limit Stop Adjustment

Detailed instructions for resetting the adjustable high temperature limit stop on both large and small valves.

General Adjustment Reminder

Emphasizes setting all mixing valves to the same operating temperature.

SETUP INSTRUCTIONS

Piping Method Requirement

States the Parallel Unit must be piped according to Leonard Required Piping Method 5.

Supply and Circulator Preparation

Ensures hot/cold supplies are operating, source temperature is set, and circulator is off.

Flow Rate and Fixture Setup

Guides setting fixtures for specific flow rates (30 GPM and 2 GPM) for setup.

Ball Valve Operation for Adjustment

Details opening and closing specific ball valves (A and B) on valve assemblies for temperature setting.

REQUIRED PIPING METHOD #5

Piping Diagram

Illustrates the piping configuration for Method #5, including components like heat trap and circulator.

Balancing Circulation System Procedure

Step-by-step guide to balancing the circulation system using balancing valves #1 and #2.

Maintenance Reminder

Reinforces the need for regular cleaning and maintenance of the control device.

SERVICING AND TROUBLESHOOTING

Servicing Large Valve

Step-by-step instructions for disassembling and cleaning the larger TM2020B valve.

Servicing Small Valve

Step-by-step instructions for disassembling and cleaning the smaller TM2020B valve.

Troubleshooting Common Issues

Lists common problems like leaks and inconsistent mixing with corresponding repair kits.

LARGE VALVE PARTS AND REPAIR KITS

Large Valve Component Breakdown

Detailed diagram and list of parts for the TM-2020B large valve.

Checkstop Parts Identification

Identifies specific parts for checkstops used in the system.

Repair Kit Contents

Lists contents for various repair kits (Packings & Gaskets, Rebuilding Kit, Checkstop Kit).

SMALL VALVE PARTS AND REPAIR KITS

Small Valve Component Breakdown

Detailed diagram and list of parts for the small TM valve.

Checkstop Parts Identification

Identifies specific parts for checkstops used in the system.

Repair Kit Contents

Lists contents for various repair kits (Packings & Gaskets, Rebuilding Kit, Checkstop Kit).

PERFORMANCE AND WARRANTY

Optional Outlet Setup Piping

Describes an optional piping arrangement for easier fixture setup and adjustment.

Flow Capacities and Limitations

Details triple flow rates and minimum flow for valves, and system pressure drop.

Limited Warranty Information

Outlines the terms of the limited warranty, including duration and disclaimers.