17 Most 110V Thermostat Wiring Diagram Galleries
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Wiring Diagram, Nest Thermostat, Wiring Diagram Motor Control System Valid Wiring Controlling 110V - I've determined that the honeywell rc840t-120 would possibly allow me to use the 24v nest thermostat with the 110v swamp cooler and using a spdt relay i could connect y1 and y2 to the 2 terminals of the two-velocity motor. Honeywell rc840t-one hundred twenty become created to connect line-voltage managed warmers to 24v thermostats however i assume it'll also work with the swamp cooler. This device may be the first relay on the way to decide if the pump and motor are going to receive energy. This first relay can be connected to a ptd102 postpone that will delay the electricity to the spdt relay, this ultimate realy is the one as a way to control the energy to the motor based totally on y2 terminal from nest thermostat. The thermostat will ship electricity to y1 best for 1st speed and in case it desires extra cooling energy it's going to start sending strength to y1 and y2 at the same time inflicting the spdt relay to switch power to high via terminal three as the subsequent diagram suggests:.
The swamp cooler has a 2-speed motor, consequently i would love the nest thermostat to manipulate both speeds the usage of y1 and y2 terminals. As some distance as i know 2 stage thermostats will apply energy from the r terminal to the y2 if extra cooling electricity is needed at the same time strength is implemented from r terminal to y1. I additionally need the water pump to work everytime the thermostat requires cooling (for each speeds), however i need the water pump to run alone for a few minutes before the motor is started out.
Underneath is a drawing that might repair those troubles but it is much extra familiar, the simplest precise element is that packard touch delay due to the fact i am strange with a everyday element name for that. If you restore 1 - three, your design should work flawlessly. Once more, the exhaust air flow is your largest trouble.
I wouldn't follow that recommendation by using mr. Solar because of protection and it's overkill. You don't need the potential to strength both excessive and low speeds at the identical time plus the 3pdt relay isn't required for something, keep the dpdt. The standard approach is to apply a spdt contact to alternate speeds so that voltage is handiest implemented to either the low or the excessive but in no way both. So the right manner is to have the dpdt relay (y1 first stage cooling) switch on pump and the time postpone relay which controls power thru the commonplace leg of a 2nd spdt relay. This 2nd spdt relay is energized via the y2 for high pace. Essentially what i'm announcing is that the original poster had the control common sense precisely correct (except for r8222b1067 coil wishes c) on his diagram and that it follows trendy control tactics and i respectfully propose to now not observe the advice given later by using mr. Solar. Nest has intelligence and does not care if you terminate r or rc since it automatically will jump these two connectors. Your hassle is transformers. I endorse changing the rc840t-120 with a 2d r822b1067. The transformer electricity might be furnished by your present furnace transformer already connected. You did not display your heating wiring so i don't know in case you had to use the c terminal currently or no longer. Usually you don't need the common cord terminated on the nest. Twine the entirety like you in the beginning display except the r822b1067 coil is going to c not r.