Honeywell T451 User Manual download pdf

95C-10903-1

T451, T651

Motor-Rated Precision Thermostats

PRODUCT DATA

The T651 thermostat provides direct, accurate line voltage

control of inductively-rated heating, ventilating, or cooling

equipment used in commercial or industrial environments.

The T451 provides precision line voltage control of motor-

rated electric, gas or oil heating equipment.

APPLICATION

FEATURES

• Deluxe styling for commercial buildings.

• Industrial grade MICRO SWITCH™ mechanism

rated 1/2 hp inductive, 5 kW resistive.

• Vertical mounting on 2” x 4” NEMA-standard

single-gang outlet box.

• High-sensitivity, vapor-ﬁlled stainless steel dual

diaphragm sensing element.

• Engineering plastic base to isolate sensor from

switch heat and minimize droop.

• CSA Certiﬁed, UL Listed.

• Altitude compensation.

• 44°F (7°C) “frost protection” setting for heating

application, independent of calibration or altitude.

• Color-coded leadwire connections.

• Range stops/locking cover security features for

public areas.

Speciﬁcations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Setting and Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . 4

Contents

1 2 3 4

Summary of Contents

Page 1 - T451, T651

95C-10903-1 T451, T651Motor-Rated Precision ThermostatsPRODUCT DATAThe T651 thermostat provides direct, accurate line voltage control of inductively-r

Page 2 - ORDERING INFORMATION

95C-10903-1T451, T651 MOTOR-RATED PRECISION THERMOSTATS SPECIFICATIONS • ORDER INFORMATIONORDERING INFORMATIONWhen purchasing replacement and moderniz

Page 3 - Replacement Applications

95C-10903-1 T451, T651 MOTOR-RATED PRECISION THERMOSTATS INSTALLATIONWHEN INSTALLING THIS PRODUCT:1. Read these instructions carefully. Failure to fol

Page 4 - Security Features:

95C-10903-1Check OutTurn on power. Raise the temperature setting to energize the heating contact and break the cooling contact. The HVAC equipment sho

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Honeywell T451 User Manual

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