A/C is just about a requirement where we live. Too bad heat during the winter is too. The house we are renting needs more weatherproofing as our gas bill for a 1500 sq ft house was over $150 this past month.
Nest Learning Thermostat
- Thread starter Frank Jr.
- Start date
- Latest activity Latest activity:
- Replies 36
- Views 4K
A/C is just about a requirement where we live. Too bad heat during the winter is too. The house we are renting needs more weatherproofing as our gas bill for a 1500 sq ft house was over $150 this past month.
The other thing you can do is just run a 24v transformer (like for a sprinkler system) to it. I happen to have a closet behind my thermostat downstairs, so if I didn't have the extra wire, I planned just putting in a transformer in the closet and poking a hole through the Sheetrock to the thermostat.
I don't have a C wire. I have G, Y, W, and R and I was able to install my Nest just fine. I guess one of the wires carries the power. I know nothing about HVAC systems so I don't know what the wires do.
I can't be sure but ..... Take a look at the thumbnails. Looks promising.
Attachments
Rh Red -24 Volt Hot for Heating
Rc Red -24 Volt Hot for Cooling
Y1 Yellow -First Stage Cooling
Y2 Blue -Second Stage Cooling
G Green -Indoor Fan
W1 White -First Stage Heat
W2 Black -Second Stage Heat
(not sure for a Heat Pump)
I have a heat pump with gas. The only option I will loose is "emergency". I have only had to use it 2 times in th 5 years I have lived in my house. I wont miss it. Pop the cover off of your thermostat and compare your connected wires using the compatability section on the Nest site. You can even take a picture of you connections and email it to Nest and they'll let you know if you are compatable.
heat pumps typically use the B or O terminal to energize the reversing valve.
most but not all heatpump reversing valves default in heat mode. so when your thermostat calls for heat (with a heat pump) Y or Y1 along with the O terminal are energized.
O terminal is reversing valve in cool mode +24 vac typical.
most but not all heatpump reversing valves default in heat mode. so when your thermostat calls for heat (with a heat pump) Y or Y1 along with the O terminal are energized.
O terminal is reversing valve in cool mode +24 vac typical.
stimpson said:
my new r410 A air source heat pumps produce decent heat down to 18F outdoor ambient.
i am an HVAC tech so i did my own installs. i paid close attention to airflow specs and refrigerant charge.
running goodman 14.5 seer units - one 4 ton and a 2 ton with 95% afue two stage gas furnaces.
