white rogers zone valve

jaybee

Can anyone explain to me how the white rogers zone valve operate.Also is it true that they are not positve stop meaning it allows small amount of water to seep through when its not calling?

bill clinton_3

white rogers zone valves

I am familiar with two styles. One is very similar to the traditional Honeywell with a paddle moved by a synchronous motor or spring for the return. I think you are talking about the second type which operates with a rotating cylinder that has openings to line up with tappings through the valve to allow flow, or, when rotated 90 degrees, to stop flow. Sealed with o rings and tight clearances. I suppose some leakage is possible, but haven't noticed it. The motors are long lived and are operated by "three-wire" thermostats. When the thermostat calls for heat, it sends power down one wire which opens the valve. When fully open, the valve interrupts the circuit, stopping right there and drawing no power. When the call for heat is satisfied, the thermostat sends power down another wire to start motor and rotate cylinder to closed position and once again interrupt power.

Bill

bill clinton_3

white rogers zone valves

I am familiar with two styles. One is very similar to the traditional Honeywell with a paddle moved by a synchronous motor or spring for the return. I think you are talking about the second type which operates with a rotating cylinder that has openings to line up with tappings through the valve to allow flow, or, when rotated 90 degrees, to stop flow. Sealed with o rings and tight clearances. I suppose some leakage is possible, but haven't noticed it. The motors are long lived and are operated by "three-wire" thermostats. When the thermostat calls for heat, it sends power down one wire which opens the valve. When fully open, the valve interrupts the circuit, stopping right there and drawing no power. When the call for heat is satisfied, the thermostat sends power down another wire to start motor and rotate cylinder to closed position and once again interrupt power.

Bill

jaybee

thanks MR.President

Unknown

jaybee, the catalogs I sent

you have a Troubleshooting Guide on Zone Valves listed. The White rodgers ZV's are explained in detail along with many others.

Alan_6

white rodgers

3 wire stat-They required 24 volts to terminal 1 and 2. 2 and 2-5 are internally wired. 5 is the termostat R connection. 4 to 5 opens the valve, 5 to 6 closes the valve. 2 makes to 3 when it opens, to turn on a heat.

2 wire stat- does not have terminal 6, and looks for 4 to 5 connection to open to close the valve.