What causes an electric zone valve to open and close?
What causes an electric zone valve to open and close?
Whenthe thermostat calls for heat in a particular building area, the thermostat switch causes the zone valve to open, to permit hot water to flow through that zone.
How does a Honeywell zone valve work?
A thermostat mounted in each desired location controls a specific Honeywell zone valve. When the thermostat calls for heat, the zone valves opens and turns on the water circulating pump to allow water flow to the area. At the same time, the zone valve sends a signal to the boiler and starts the burners.
Should zone valve be open or closed?
The valve should open, and the end switch should close the circuit to the circulator or other valve at the end of the opening stroke. 3. Lower the setpoint of the zone thermostat below room temperature so that it satisfies.
How does a zone valve on a Honeywell v8043 work?
A Honeywell V8043 zone valve has a rubber BALL that rotates on an axle at the end of a shaft. Every time the valve opens and closes, that rubber ball rotates slightly so there’s always a different circular area on the rubber ball contacting the brass seat to shut off the water flow.
Is the Honeywell 8043 power return valve closed?
The Honeywell 8043 is Normally Closed. When it is powered up, it opens. When the power goes off a spring return closes this valve. I have read the specifications sheet for this valve along with other specification sheets.
How does the zone valve work on a Honeywell boiler?
On a call for heat from one of the zones in the boiler loop, the zone valve opens. Once the valve fully modulates open, that action closes a switch on the end of the valve, called an end switch. That completes a circuit and tells the boiler aquastat control (or other control) to turn on the circulator pump.
Why is my Honeywell zone valve stuck open?
It’s a spring return valve, with wire disconnected from either TH or TR, it should spring close. If it does and flow still moves through it it could be the rubber ball inside the body has come off, or is chipped.