Honeywell T451 Thermostat User Manual


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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
CL 4-01 • © Honeywell Limited/Limitée 2001
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