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T451A, T651A, T694A,B,D,F
T451, T651, T694 Thermostats provide on-off
control of valves, fans, motors, contactors, electric
heat elements, duct furnaces and fan coil units in
heating/cooling systems. Switching subbases pro-
vide manual control of heating, cooling and fan.
T451A provides heating control only.
T651A provides heating and cooling control.
T694A,B,D,F supplied with switching subbase to pro-
vide manual control of heating, cooling and fan.
Q473A,B switching subbase available for T451A/
T651A.
Automatic cooling anticipator for 120, 208, 240 and
277 Vac.
Line Voltage Thermostats
J. H. • Rev. 9-92 • ©Honeywell Inc. 1992 • Form Number 63-2051-4
1
Light Duty
T451A,
T651A
T694A
Thermostats use spst or spdt snap switches activated
by bimetal sensor.
T451A/T651A mount on standard vertical or horizon-
tal junction box.
Options include adjustable range stops, locking cover,
concealed setpoint, locking setpoint, positive off con-
trol, cover thermometer.
CONTENTS
Specifications ................................................. 2
Ordering Information ..................................... 2
Installation ..................................................... 4
Checkout ......................................................... 7
T694B,D,F
63-2051-4
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Summary of Contents for Honeywell T451A
- Page 1 Automatic cooling anticipator for 120, 208, 240 and 277 Vac. CONTENTS Specifications ..........2 Ordering Information ........2 Installation ............. 4 Checkout ............7 J. H. • Rev. 9-92 • ©Honeywell Inc. 1992 • Form Number 63-2051—4 63-2051—4...
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Page 2: Specifications
If you have additional questions, need further information, or would like to comment on our products or services, please write or phone: 1. Your local Honeywell Home and Building Control Sales Office (check white pages of your phone directory). 2. Home and Building Control Customer Satisfaction Honeywell Inc., 1885 Douglas Drive North... - Page 3 T451A/T651A. 199242 Wallplate, covers old T694 wall marks when DIMENSIONS: See Figs. 1 and 2. installing new T694. Supplied with SUPER TRADELINE model T651A. Fig. 1—T451A, T651A mounting dimensions in in. [mm]. [35] [14] 4 17 [114]...
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Page 4: Installation
4. After installation is complete, check out product op- eration as provided in these instructions. T451A/T651A THERMOSTATS (Fig. 3) T451A/T651A Thermostats mount vertically on a 2 x 4 CAUTION in. or 4 x 4 in. junction box. See Fig. 3. Use 2 x 4 in. cover plate with 4 x 4 in. - Page 5 T451A, T651A, T694A,B,D,F INSTALLATION 1. Before mounting thermostat, connect system wiring 2. Remove thermostat cover assembly. Attach thermo- to proper terminals at rear of thermostat. Follow equip- stat to junction box with two screws provided. Replace ment manufacturer instructions or refer to Fig. 4 for thermostat cover assembly.
- Page 6 T451A, T651A, T694A,B,D,F INSTALLATION Fig. 6—T694A in heating-cooling system with Fig. 8—T694D with isolated switching for heating independent valve and fan circuits. and cooling. Fig. 7—T694B connected for positive-off switch- Fig. 9—T694F with positive-off position. ing in COOL position.
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Page 7: Checkout
4. Adjust thermostat for desired room temperature. If questions arise regarding this product, contact your NOTE: Wider temperature differential ranges can occur distributor or local Honeywell representative. when used in cooling applications with current draws that are more than four amps. If a wider differential range is unacceptable, use a T6051 Heavy Duty Line Voltage Thermostat for a smaller differential range. - Page 8 Home and Building Control Home and Building Control Helping You Control Your World Honeywell Inc. Honeywell Limited—Honeywell Limitée 1985 Douglas Drive North 740 Ellesmere Road Golden Valley, MN 55422 Scarborough, Ontario M1P 2V9 QUALITY IS Printed in U.S.A.