Honeywell T451A User Manual Download Page 6 | Manualshive

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T451A, T651A, T694A,B,D,F

INSTALLATION

Fig. 6—T694A in heating-cooling system with
independent valve and fan circuits.

Fig. 7—T694B connected for positive-off switch-
ing in COOL position.

Fig. 8—T694D with isolated switching for heating
and cooling.

Fig. 9—T694F with positive-off position.

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Summary of Contents for T451A

Page 1: ...tches activated by bimetal sensor T451A T651Amountonstandardverticalorhorizon tal junction box Optionsincludeadjustablerangestops lockingcover concealedsetpoint lockingsetpoint positiveoffcon trol cover thermometer T451A provides heating control only T651A provides heating and cooling control T694A B D Fsuppliedwithswitchingsubbasetopro vide manual control of heating cooling and fan Q473A B switch...

Page 2: ...oling and fan circuits T694D2009 Heating cooling Heating circuits isolated ON OFF HEAT COOL HI MEDIUM LO from cooling circuits OFF position breaks all control circuits except heat T694F2007 Heating cooling Heating circuits isolated ON OFF HEAT COOL HI MEDIUM LO from cooling circuits OFF position breaks all power to fan and thermostat a With thermometer Ordering Information When purchasing replacem...

Page 3: ...RIES Q473A2006 Switching Subbase Use with T651A for HEAT OFF COOL manual system switching Q473B2005 Switching Subbase Use with T451A T652A for AUTO OFF switching in heating only or cooling only applications 220124A Faceplate vertical Fahrenheit scale with thermometer a 220124B Faceplate vertical Celsius scale with ther mometer 220124C Faceplate horizontal Fahrenheit scale with thermometer a 220124...

Page 4: ... circulation at average room temperature Do not install the thermostat where it may be affected by drafts or dead spots behind doors and in corners hot or cold air from ducts radiant heat from sun or appliances concealed pipes and chimneys unheated uncooled areas behind the thermostat such as an outside wall WIRING AND MOUNTING Disconnect power supply before making wiring connec tions to prevent e...

Page 5: ... OPTIONAL COVERS OLD T651A WALL MARKS WHEN INSTALLING NEW T651A T694A B D F THERMOSTATS Fig 5 All T694A B D F Thermostats mount vertically on a 2 x 4 in or 4 x 4 in junction box See Fig 5 Use 2 x 4 in cover plate with 4 x 4 in junction box 1 Before mounting connect system wiring to proper color coded leads at rear of thermostat Follow equipment manufacturer instructions or refer to Figs 6 9 for ty...

Page 6: ...ig 6 T694A in heating cooling system with independent valve and fan circuits Fig 7 T694B connected for positive off switch ing in COOL position Fig 8 T694D with isolated switching for heating and cooling Fig 9 T694F with positive off position ...

Page 7: ...en 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 T694 NOTE System switch must be in ON position to check out system 1 Close the disconnect switch if used and press HEAT switch adjust setpoint above room temperature and check that heating syste...

Page 8: ...me 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 Printed in U S A QUALITY IS KEY ...

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