Legend T-45NL, T-46NL Installation Manual

T-45NL & T-46NL

THERMOSTATIC MIXING VALVES

Application

Legend thermostatic mixing valves are designed for applications requiring temperature control, scald
prevention and reduction of thermal shock in domestic potable water distribution (Model T-45NL)
and radiant heating installations (Model T-46NL). The three-way thermostatic mixing design permits
controlled water temperatures to individual or multiple fixtures, gang showers or hydronic heating loops.

Before beginning, check your local code requirements. Select the correct model for your application, as it
pertains to at-the-source, individual or multiple fixtures, point-of-use or heating systems applications:

Model T-45NL: Certified in compliance with ASSE 1017, 1069, 1070, and ANSI/NSF 61

Model T-46NL: Certified in compliance with ASSE 1017 and ANSI/NSF 61

Installation Guide

CAUTION!

PLEASE READ THESE INSTRUCTIONS BEFORE INSTALLING AND OPERATING!

Note: Both models feature optional union-connection types in MNPT, compression, press-t, push-t, PEX barb (F 1807), and sweat:

MNPT COMP PRESS PUSH F 1807 SWEAT

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T-45NL & T-46NL

Installation Guide

THERMOSTATIC MIXING VALVES

Applications

1. Valves must be installed in an accessible location, to permit adjustment, servicing and cleaning procedures. It is strongly recommended
that ball valves are installed upstream of the hot and cold inlet connections, to allow for the removal and servicing of the mixing valve:

Typical domestic water distribution installation:

COLD

LEGEND T/S-1001NL
BALL VALVE

HOT

WATER
HEATER

MIX

LEGEND
T-45NL

HHC

C

C

COLD WATER SUPPLY

Typical radiant heating installation:

Float type Air Vent &
Air Scoo p (air purger)

Expansion

Tank

Purging/Fill

Valves

3-Way Thermostatic
Mixing Valve (Model T-46NL)

HOT

MIX

COLD

System

Circulator

Thermometer

Pressure Differential

Bypass Valve

Radiant Manifold

Radiant Manifold

Boiler (Condensing)

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