Summary of the content on the page No. 1
T451A, T651A, T694A,B,D,F
Light Duty
Line V oltage Thermostats
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,
T694B,D,F
T651A
T694A
■ T451A provides heating control only. ■ Thermostats use spst or spdt snap switches activated
by bimetal sensor.
■ T651A provides heating and cooling control.
■
Summary of the content on the page No. 2
T451A, T651A, T694A,B,D,F SPECIFICATIONS • ORDERING INFORMATION Specifications — Automatic cooling anticipator for 120, 208, 240 and SUPER TRADELINE MODEL 277 Vac. TRADELINE models are selected and packaged to provide —Vertical faceplate with Fahrenheit scale and ther- ease of stocking, ease of handling and maximum replace- mometer. ment value. TRADELINE model specifications are the — Horizontal faceplate with Fahrenheit scale and ther- same as those of standard models except as noted below. mom
Summary of the content on the page No. 3
T451A, T651A, T694A,B,D,F SPECIFICATIONS ELECTRICAL RATINGS (A): FINISH: Brushed champagne gold and dark pewter face- plate; beige and brown case. Voltage (Vac) 120 208/240/277 UNDERWRITERS LABORATORIES INC.: Listed. a Full Load 8 4 ACCESSORIES: Locked Rotor 48 24 Q473A2006 Switching Subbase: Use with T651A for a Wider temperature differential ranges can occur when HEAT-OFF-COOL manual system switching. used in cooling applications with current draws that are Q473B2005 Switching Subbase: Use wi
Summary of the content on the page No. 4
T451A, T651A, T694A,B,D,F INSTALLATION Fig. 2—T694A,B,D,F mounting dimensions in in. [mm]. 7 1 8 [48] SYSTEM ON 60 70 50 80 OFF 40 90 7 9 HEAT 4 3 3 8 32 [76] [124] [83] COOL F FAN HI MED LOW 29 4 15 32 32 9 1 [125 ] [35] 16 [40] (T694B SHOWN) 13 1 32 M6129 [36] Installation Do not install the thermostat where it may be affected by: WARNING •drafts, or dead spots behind doors and in corners. ! • hot or cold air from ducts. Do not use on electric heat. Possible fire hazard if •radia
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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. typical system hookup. 2. Remove cover assembly from thermostat. Attach thermostat to junction box with two screws provided. Re- Fig. 4—T652A in heating-cooling sy
Summary of the content on the page No. 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. 6
Summary of the content on the page No. 7
T451A, T651A, T694A,B,D,F CHECKOUT Checkout After the thermostat is wired and mounted, perform the T694 following system checkout procedure. NOTE: System switch must be in ON position to check T451/T651 out system. IN HEATING APPLICATION: 1. Close disconnect switch (if used). 1. Close the disconnect switch (if used) and press 2. Adjust setpoint above room temperature and check HEAT switch; adjust setpoint above room temperature that heating system turns on. and check that heating system turns on
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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 KEY 8 Printed in U.S.A.
