accurate temperature control】internal sensor floor sensor, perceptive ambient temperature and the floor's temperature. automatically obtain the temperature. the measurement accuracy of this digital temperature controller is ± 0.5 ℃, the temperature measurement range is 0‑95 ℃, and the temperature range that can be set is 50‑60 ℃ (upper limit is adjustable). Y terminals are for the connection to the compressor relay. It most often wires to the air handler (indoor split-system unit). Y1 is for ordinary or one-stage cooling; this is what most of us have at home. Y wire with “Y1” code is usually yellow-colored. You can read more about what size wires you need for air conditioners here. These boilers require a mains voltage thermostat, which can have 2 or 3 wires. The boiler will have a terminal which activates the boiler when mains voltage is applied to it, typically labelled SL or Switched Line. 2 wire thermostat

Old manual thermostats don’t require a C-wire. Programmable and smart thermostat do; this C-wire needs as 24V power source. Any other source – be it 12V battery, or even 110-120V AC voltages, requires a transformer/inverter that will turn any electricity into 24V DC source. A frost thermostat is wired in exactly the same way as the examples above, however there will be a separate set of terminals in the boiler for this. Put on the control panel, and test if your boiler or hot water heater connected to the 3-wire thermometer functions properly.Note that the proper connection of L and SL is important. If these are reversed, the accelerator heater will be powered continuously. This will significantly reduce the life of the heater, and in many instances result in the thermostat being permanently on, regardless of the room temperature.

In recent years, thermostats have become more and more high-tech. There are now several different types of thermostats on the market, from the standard programmable thermostat to the more advanced Wi-Fi thermostat. If you’re looking for a high-tech thermostat that is easy to use and doesn’t require any programming, then a 2-wire smart thermostat may be the perfect option for you. The Nest 3rd Gen thermostat has 10 terminals, say Rh, Rc, W1, W2(aux) Y1, Y2, O/B, G, C, etc. You just need to connect ‘red’ wire from the furnace to Rh and ‘white’ wire to W1. These 2 connections will set the Nest thermostat as a ‘smart 2 wire thermostat’ taking care of your home heating ‘smartly’.The difference between 2 wire and 3 wire thermometer is the “G” or green wire that is usually used for fans. In the 3 wire thermostat wiring, the green wire serves as a repurposed C or “Common” wire. Here is the 3 wire thermostat wiring color code: When you have done that, you can safely remove the old thermostat. Installing A New Thermostat (Reconnecting Wire By Wire) If your thermostat doesn’t look exactly like this, or even anything like this, don’t worry. We just need to get a grip of what each color wire is and what it does. These are more common. In addition to the line and switched line, a neutral is also required. This is used to power a small heater inside the thermostat, to improve response times. Without this, the temperature difference between the thermostat switching On and Off (hysteresis) will be excessively large, resulting in the room temperature fluctuating significantly.