serker
Nov 20, 2006, 07:47 AM
I'm very confused, so the question may be long and confusing as well, I endeavor to be precise. Please remember, this question is about thermostats.
I have a three story house, levels are named B, 1, and 2.
There are two A/C units, and one heating unit.
Main A/C handles B and 1, Secondary A/C handles level 2. Yes, there are two "outside" units on the side of my house--they are separate units (i.e. they don't share freon)
The heating unit is a hot water baseboard recirculator, which splits hot water from it's boiler to all three floors.
Level B has a round thermostat that controls heat. It's a mercury thermostat.
Level 1 has two thermostats right next to each other. One is Rectangular and controls Main A/C, the other is the same round thermostat as on level B, and controls heat. They're both mercury thermostats.
Level 2 has two thermostats right next to each other. Both are Rectangular, mercury, different brands; one controls heat, and one controls the Secondary A/C.
Confused yet? I'm confused, but here are more notes:
None of these thermostats have HEAT/OFF/COOL on them, since they're all separate units.
The A/C units do not have a FAN/AUTO switch on them. That's all controlled in the A/C unit evidently.
Here's the question:
I want a programmable thermostat on each level, to replace all of them. That means I need a simple two wire digital programmable for level B. That's easy.
Here's the hard one:
I want a programmable thermostat on Level 2 and Level 3, that controls both heat and A/c on the level, all in one unit. I have two wires from the existing thermostats (each), meaning it's a simple on/off circuit. And I already know they're all 24v.
The issue is, I need the thermostats to have separate 24v connections--no common ground--otherwise power could get back through the system and (not that I'm concerned about blowing anything) cause the A/C or Heat to turn on.
Heh... just for comic relief:
The idiots at Lowe's say they don't sell anything like this, because it can't be done. I have to use separate thermostats. They've also never heard of an A/C thermostat that only uses two wires, so I'd have to contact an HVAC supply to have them trace down my "serious fire hazard" problem with the thermostats in my house.:rolleyes:
My local HVAC supply people want to sell me a $450 thermostat for each floor. It's digital, backlit, touch screened, is programmable from my laptop, and requires a alarm pair and monthly monitoring fee.:rolleyes:
Please tell me the truth is in the middle, and what kind of thermostat I'm looking for... is it a multi-stage, stage 2, etc... or... what wire colors am I looking for on Grainger's site? (They always list B, W, Y, O, etc... but some have O2, and Y2... and now you know why I'm confused... )
I have a three story house, levels are named B, 1, and 2.
There are two A/C units, and one heating unit.
Main A/C handles B and 1, Secondary A/C handles level 2. Yes, there are two "outside" units on the side of my house--they are separate units (i.e. they don't share freon)
The heating unit is a hot water baseboard recirculator, which splits hot water from it's boiler to all three floors.
Level B has a round thermostat that controls heat. It's a mercury thermostat.
Level 1 has two thermostats right next to each other. One is Rectangular and controls Main A/C, the other is the same round thermostat as on level B, and controls heat. They're both mercury thermostats.
Level 2 has two thermostats right next to each other. Both are Rectangular, mercury, different brands; one controls heat, and one controls the Secondary A/C.
Confused yet? I'm confused, but here are more notes:
None of these thermostats have HEAT/OFF/COOL on them, since they're all separate units.
The A/C units do not have a FAN/AUTO switch on them. That's all controlled in the A/C unit evidently.
Here's the question:
I want a programmable thermostat on each level, to replace all of them. That means I need a simple two wire digital programmable for level B. That's easy.
Here's the hard one:
I want a programmable thermostat on Level 2 and Level 3, that controls both heat and A/c on the level, all in one unit. I have two wires from the existing thermostats (each), meaning it's a simple on/off circuit. And I already know they're all 24v.
The issue is, I need the thermostats to have separate 24v connections--no common ground--otherwise power could get back through the system and (not that I'm concerned about blowing anything) cause the A/C or Heat to turn on.
Heh... just for comic relief:
The idiots at Lowe's say they don't sell anything like this, because it can't be done. I have to use separate thermostats. They've also never heard of an A/C thermostat that only uses two wires, so I'd have to contact an HVAC supply to have them trace down my "serious fire hazard" problem with the thermostats in my house.:rolleyes:
My local HVAC supply people want to sell me a $450 thermostat for each floor. It's digital, backlit, touch screened, is programmable from my laptop, and requires a alarm pair and monthly monitoring fee.:rolleyes:
Please tell me the truth is in the middle, and what kind of thermostat I'm looking for... is it a multi-stage, stage 2, etc... or... what wire colors am I looking for on Grainger's site? (They always list B, W, Y, O, etc... but some have O2, and Y2... and now you know why I'm confused... )