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(OBSOLETE) ORDER THE510D106 Non Programmable 1-Stage Heat 1-Stage Cool Heat Pump or Electric Heating

Price: $0.00 
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SKU: THE840C1032
(See Product Details Below for Manufacturers Part Numbers)

Honeywell T8400; T8401 Electronic Thermostats; T8411 Electronic Heat Pump Thermostat; T8424 Electronic Multistage Thermostat.




Electronic Thermostats provide temperature control for 24V heating-cooling systems, including multistage heat pump systems and multistage conventional systems, with manual changeover from heat to cool.


Attractive styling complements any decor.

Ease-of-use means fewer questions and increased satisfaction.


Large display for quick easy readability.


Keys are located by the display for easy access.


Fan and system switches are located on the lower edge to eliminate accidental setting changes.


Easy installation, setup and self-test saves installer time.


Manual changeover from heat to cool eliminates unexpected system operation.


T8400; T8401 for 1 stage heat, 1 stage cool.


T8411 for 2 stage heat, 1 stage cool.


T8424 for up to 2 stage heat, 2 stage cool.


Degree F or C temperature display for added model flexibility.


Selectable heating cycle rate for a variety of applications.


Cooling cycle rate is fixed (3 cph), the standard setting for compressors, for speedy installation.


Setpoints are permanently held in memory (no batteries used) and retained during power outages.






(Color Taupe)




Product Specifications




Description Electronic Thermostat


Application Cooling and electric heat systems


Mounting Square


Color Taupe


Terminal Designations R, W, Y, G


Accuracy (C) 0.5 C


Accuracy (F) 1 F


Dimensions (in.) 3 1/2 in. high, 3 1/2 in. wide, 1 3/16 in. deep, 3 1/2 in. high, 5 1/2 in. wide, 1 3/16 in. deep


Dimensions (mm) 89 mm high, 140 mm wide, 55 mm deep, 89 mm high, 89 mm wide, 55 mm deep


Setting Temperature Range (F) 40 F to 99 F


Setting Temperature Range (C) 4 C to 37 C


Electrical Ratings (Vac) 18 to 30 Vac


Cycles per Hour Adj. 1,3,4,5,6,9,12 depending on model


Currents (Cooling) .02 to 1.5A run; 7.5A inrush; 2nd stage 1.0A Max


Currents (Heating) .02 to 1.5A run; 7.5A inrush; 2nd stage 1.0A Max


Currents (Fan) .02 to .5A run; 2.5A inrush


Interstages Differential Temperature (C) .5 to .8 C Multistage models only


Interstages Differential Temperature (F) 1 to 1.5 F Multistage models only


Operating Range (C) 4 C to 43 C


Operating Range (F) 40 F to 110 F


LED's none


Frequency (Hz) 60Hz or 50/60 Hz


Power Method Power-Stealing


Sensor Element THERMISTOR


Stages (cooling) 1


Stages (heating) 1


Switch Positions (Fan) AUTO-ON


Switch Positions (System) COOL-OFF-HEAT


Switch Type Electronic


Humidity Ratings (% RH) 5% RH to 90% RH, non-condensing

Replaces Part Numbers:


T8400C1032A
CART8400C1032

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I would like to thank you for your hard work in getting us our part in a timely fashion. You were very helpful and you understood the severity of the situation and did a wonderful job in getting the part to us. Thanks again and please share this with your boss! You were outstanding!"
Todd Mills

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