Red and white wire from wall, new thermostat has 2 black wires from the back of it. It is a Honeywell model r 430 and it is a sealed unit.

From what I find, Honeywell R430 is not a thermostat but a part of a system integrator for building control. Thermostats have terminals on them, not wires.

Google Honeywell R430 and you will see.

From what I find, Honeywell R430 is not a thermostat but a part of a system integrator for building control. Thermostats have terminals on them, not wires.

Google Honeywell R430 and you will see.

The model # is RLV4305A it was a typo. There are 2 black wires coming out the back of it.

Looks like they hook up any way. Manual is linked
http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&sqi=2&ved=0CB4QFjAA&url=http%3A%2F%2Fwww.honeywellstore.com%2Fstore%2F products%2F5-2-day-programmable-triac-line-volt-thermostat-honeywell-rlv4305a.htm&ei=4X6gVOmWHMmqgwS_sIC4Bw&usg=AFQjCNGoORw-NLKIVGEIUeyUU3C0Qv-COw&sig2=dhJeMPv2DQ1bcLNmbdcDZw

Looks like they hook up any way.

Thanks, I just read that the wires are not polarized. Thanks