Honeywell V8043E1012 Wiring Diagram (2024)

FAQs

What are the colors of the wires on a Honeywell 3 port? ›

The blue wire is the Neutral, N. The green/yellow wire is the Earth wire, E. The white wire is connected to the wire from the room thermostat which calls for heating (radiators or underfloor). The grey wire is used to drive the valve to the Water Off position, in which only the heating port A is open; it closes port B.

The yellow wires power the zone valve. Once the thermostat calls and the valve opens it closes an end switch (connected to the red leads) which calls in the aquastat relay.

US AC power circuit wiring color codes

The protective ground is green or green with yellow stripe. The neutral is white, the hot (live or active) single phase wires are black , and red in the case of a second active. Three-phase lines are red, black, and blue.

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)

It connects your thermostat to your air handler or furnace. The white wire connects to terminal W in most industry-standard thermostats. If your HVAC system has multiple heating stages, then you may find more than one white wire.

In traditional cooling systems, the yellow wire controls the cooling function. In a heat pump, it controls the compressor, which can both heat and cool your home. The yellow wire is connected to the Y or Y1 terminal on your thermostat. In a multi-stage cooling system, this serves as the first stage.

Red: Hot Wire

You will usually only see a red wire when an outlet is a 240-volt outlet or when a wall switch controls the outlet. In this case, when the switch is "on," the red wire will supply power to the outlet instead of the black wire. Like black electrical wires, red wires are also hot or live wires.

The brown is a switched live to the motor and the grey is a permanent live to the micro-switch which then energises the orange wire to the boiler - which must only operate once the valve has been opened.

What is the white wire on the zone valve? ›

The extra white wire is another type of live: it acts as a signal or switch input for either the heating or hot water circuit, moves the motor round and turns the boiler or pump on. It's a little extra system safeguard so the boiler of pump don't run unnecessarily when there's nowhere for the water to flow to.

If you have a mid position valve - the one that makes a T junction, one pipe goes to the hot water cylinder (marked B on the zone valve), and the other to the central heating (A). The pipe marked AB comes from your boiler, so it should be hot.

Zone valves

The valves have 5 wires - blue neutral, green/yellow earth. Brown is connected to the motor inside, grey and orange are connected to an internal switch. When 230V is connected to the brown wire, the motor opens the valve and the switch inside connects grey and orange together.

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)

The three-core cable is used for lighting circuits and circuit installations. 3. What are the 3 core and earth wiring colours? The 3 core and earth wiring colours are live brown wire, a neutral grey wire, a green/yellow protective earth wire, and an additional black conductor.

White, W wire: It is a heating wire and connects to the W or W1 terminal. Yellow, Y wire: It is a cooling/compressor wire and goes to the Y terminal. Black or blue, C-wire: This wire provides a continuous 24-volt power supply to smart thermostats in order for them to utilize their smart functions 24/7.