Hvac Safety Switch Wiring

Plug drain downstream from installation.

Hvac safety switch wiring.

If the air handler s float switch has tripped the primary condensate drain has stopped up due to a blockage and the blocked water has tripped the float on the float switch. Let s start with some float switch basics float condensate. Safety float switch issues. Safe t switch detects clogged a c condensate drains and shuts off the system to prevent water damage to floors walls and ceilings.

One will ground a bare copper or green wire one will be neutral a white wire and one or two will be hot wires black or a combination of black and red. 05 01 2013 08 13 am 5. Video continue reading safe t. Thanks for taking the time to watch our videos.

I always wire these float switches to shut blower and everything off if float switch is the issue. However small lizards or frogs occasionally become lodged in the pipe stopping the flow of the water. It may be trap is clogged and float is doing its job. Wiring your disconnect switch will vary slightly from one type of switch to another.

If you have any questions let us know. Turn the hvac circuit breaker on and set the thermostat to run on cool lift the float arm on the float switch while the system is running and hold it for at least 1 minute. Can be installed horizontally or vertically inline or on the primary pan s auxiliary drain outlet by using the included adapter bushing and cap. Can be installed on a sloping line and does not need to be level or plumb.

We are here to help you to learn how to do hvac service things like. Confirm that float rises and unit stops. Test switch by lifting float with unit on. Before the pan overflows and check for plumbing leaks.

In my experience there are few areas of the trade where technician and installer preferences and opinions vary greatly. Point and run unit to fill pan. Depending on whether you have a 110v or 220v circuit you will have either 3 or 4 wires. Some systems have an internal time delay on the blower and will continue to run for 30 seconds to 60 seconds after receiving a low voltage signal to turn off.

Condensate overflow prevention devices or float switches as they are often called are such simple devices that you wouldn t think there would be much room for controversy. If wired correctly unit will stop running. Bleach should drain quickly from safety float.