What do the wires do on a 3 port valve?
3 Port Valve Operation Electrically, the valve has 5 wires: Green/Yellow, Earth – connected to the metal body of the valve. Blue, Neutral – internally connected to the neutral side of the motor. White, Live in 1 – Activates the motor inside the valve to select either AB (both) or A (heating)
What is an end switch used for?
An end-switch is a one that makes or breaks to indicate positive proof of equipment position such as a damper. Ex. in HVAC control systems they are used to prove a damper to be open before a fan starts. They may also be used to illuminate position indicating lights or signal an automatic control system of some action.
What does TT on boiler mean?
Two terminals are usu- ally available at the boiler and are referenced as the “T T” or thermostat connections. it is the designation for the terminals on a relay that the thermostat typically is connected to. The thermostat becomes the switch.
Can a 2 wire zone valve work with a 3 wire ZV?
Honeywell for sure as well. The 3 wire stats you have will work with a 2 wire zone valve. You just have to figure out which 2 wires you have to use. 3 wire ZV’s (White-Rodgers) are a royal PITA. Too many moving parts, and two many switches, and if one of them fails the valve fails.
What is the rating of a Honeywell zone valve?
One model of 3/4 Honeywell zone valve is rated at 3CV, while another 3/4 valve is rated at 8CV. The White Rogers 1311 series is rated at (I think) 24CV. Look down the barrel of an open valve and compare.
Can you use a two wire thermostat with a three wire valve?
The three wire 1311 uses a SPDT thermostat and if the valve is replaced with a two wire the thermostat must be changed to a two wire thermostat, it will work with a three wire but you will not have the anticipator in the circuit which would perhaps affect the cycling aspect of the system.
What happens if one of the Honeywell switches fails?
Too many moving parts, and two many switches, and if one of them fails the valve fails. With the Honeywell valve, you can replace the switch and motor gear (wear items) without having to break into the water side of the system.
