Honeywell T8400B Installation Instructions Manual Download | Manualshive

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69-1494–1 G.H. Rev. 2-02 Printed in Mexico

www.honeywell.com/yourhome

Honeywell Limited-Honeywell Limitée

35 Dynamic Drive

Scarborough, Ontario

M1V 4Z9

Automation and Control Solutions

Honeywell

1985 Douglas Drive North

Golden Valley, MN 55422

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Summary of Contents for T8400B

Page 1: ...his control is replacing a control that contains mercury in a sealed tube do not place your old control in the trash Dispose of properly Contact your local waste management authority for instructions regarding recycling and the proper disposal of an old control INSTALLATION When Installing this Product 1 Read these instructions carefully Failure to follow them could damage the product or cause a h...

Page 2: ... Fig 2 1 Place the desired decorator cover plate and the wallplate at the desired location on the wall 2 Pull the thermostat wire through the entrance hole on the decorator cover plate then through the wallplate entrance hole 3 Select the two mounting holes that best fit the application 4 Fasten the decorator cover plate and the wallplate to the wall using the anchors and screws provided 5 After w...

Page 3: ...EW HOLE MOUNTING SCREW HOLE ALTERNATE MOUNTING SCREW HOLE KEEP WIRING IN SHADED AREA WIRING ENTRANCE HOLE W Y G R C Fig 4 Wiring connections M11232 FOR WRAPAROUND STRIP 7 16 IN 11 MM FOR STRAIGHT INSERTION STRIP 5 16 IN 8 MM TERMINAL SCREW W G Y R C Fig 5 T8400B heat only wiring diagram in a single transformer system with gas heat L1 HOT L2 1 1 W G R FAN RELAY HEATING PRIMARY CONTROL 24V POWER SUP...

Page 4: ...o On Cool Off Heat INCREASE SETTING DECREASE SETTING SYSTEM SWITCH FAN SWITCH TEMPERATURE DISPLAY M11020A Set Room Fig 10 T8400C Digital Display and Switches FAN Switch Not Available on all Models Fan switch settings are Auto Normal setting for most homes In cooling the fan starts and stops with the cooling equipment In heating the fan is controlled directly by the heating equipment and may start ...

Page 5: ...on the digital display press either the or key once The setpoint temperature is displayed for approxi mately five seconds as the indicator points to Set and flashes 3 To increase the setpoint temperature press the key Each press changes the setpoint one degree press and hold to change the setpoint several degrees Optional System Checkout When in steps 2 and 3 only the key can be used to turn heat ...

Page 6: ...NotAvailable on all Models 1 Slide the SYSTEM switch to Off and the FAN switch to On The fan should run continuously 2 Slide the FAN switch to Auto In heating the fan is controlled directly by the heating equipment and may start a few minutes after the heating equip ment turns on for most systems When using an electric heat thermostat the fan starts and stops with the heating equipment In cooling ...

Page 7: ...69 1494 1 7 T8400B C T8401C ELECTRONIC THERMOSTATS ...

Page 8: ... 02 Printed in Mexico www honeywell com yourhome Honeywell Limited Honeywell Limitée 35 Dynamic Drive Scarborough Ontario M1V 4Z9 Automation and Control Solutions Honeywell 1985 Douglas Drive North Golden Valley MN 55422 ...

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