Question about Honeywell Programmable Thermostat Heater

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I am changing from a Seco control thermostat model # tb1540e-g to

A honeywell rth230b and the wires are labeled differently causing confusion. Does anyone know the functions for the Seco control tb1540e-g labels are R,W,Y,E,G

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Rc/Rh should be from the transformer if a single transformer system. If its'a dual transformer system, then there should be a red wire to each from it's respective unit (furnace=Rh, condensor=Rc.).
W should be heat.
Y Should be cooling.
G should be fan.
I am not certain what E is, unless the stat can be used on a heat pump with backup electric heat, in which case it's for the electric heat.

The reason I say should be, is because if you are looking at wire colors, and not terminal designations, there is no guarantee the control wiring was connected following normal convention.

Reply back of any further questions.

Posted on Feb 03, 2009

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