Tip & How-To about Heating & Cooling
The V8043E1012 Honeywell zone valve is one of the most common zone valves installed on many hydronic hot water heating systems. This zone valve has been a rock solid staple in the heating industry for many years.
It is a simple two way on-off low voltage valve that consists of two parts. There is an actuator that has a motor and an end switch, and then there is the valve assembly that controls the flow of the water.
The actuator contains a small 24v synchronous motor to open the valve and hold it open as long as power is supplied to the motor. When power is turned off the spring loaded return pulls the valve back shut. The power to the motor can be control through any low voltage thermostat. Power consumption is only 7.7va so up to 6 valves can be controlled from one 40va transformer. The actuator also has a manual open feature that allows you to manually open the valve in the event of a power failure. The valve will then return to normal operation when the power is restored.
In the event of an actuator failure the motor or the whole actuator can be replaced without removing the valve or draining the system. The replacement process is very easy and can be performed in a matter of minutes. The process only requires the loosening of two screws and the change over of the wiring.
The valve assembly is normally a straight through design that is built in such a way so that the valve can be installed without disassembly. The simple ball design is such that the ball is suspended inside the valve without touch any metal in the fully open position. This allows the valve to be soldered in the piping fully assembled. Each time the valve is opened and closed the ball is turned slightly which keeps dirt from building up at one spot and creating a leak. This also allows for even wear on all surfaces and therefore this valve virtually does not ever wear out from use.
There are some failures in these valves after years of use. The most common things that go wrong are the failure of the motor and the wearing out of the gears inside to the point where they skip and do not open the valve. The end switch will give problems on rare occasions.
Overall after installing hundreds of these valves I rate them as one of the best zone valves on the market. They are easy to install and service. Considering the wear and tear that a zone valve receives the total number of failures seen with these valves is very minimal.
Posted by D. Floyd... on
Oct 26, 2012 | Honeywell V8043E1012 Zone Valve 3/4 Sweat,...
May 29, 2017 | Honeywell Heating & Cooling
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