Two Nest Power Connectors with Two Honeywell Zone valves wiring

[Andy31]

can someone explain how can I wire two thermostats with two zone valves with two power connectors?

I did exactly  like this, but one of my zone doesn't work.https://drive.google.com/file/d/1yEnagSi9I-piXFHbja2J8Bi7UwOdp51d/view?usp=drive_link 

[zoeuvre]

Hi Andy31, 

Thanks for reaching out to us. Certainly! Wiring two thermostats with two zone valves and two power connectors can be done using a parallel wiring configuration. Here's a step-by-step guide:

1. Determine the power source for your system. Typically, you'll have a transformer that provides 24V AC power to the zone valves and thermostats. Locate the terminals on the transformer where the power wires are connected.
2. Connect one power wire from the transformer to each of the zone valves. Each zone valve should have its own power connection. Refer to the zone valve's documentation or the manufacturer's instructions for the specific wiring terminals.
3. Each thermostat should have a pair of wires connected to it. Typically, these wires are labeled "R" (power) and "W" (call for heat). Connect the "R" wire from each thermostat to the corresponding "R" terminal on each zone valve. Connect the "W" wire from each thermostat to the corresponding "W" terminal on each zone valve.
4. If your thermostats require a common wire (C-wire) for power, you'll need to connect a common wire from the transformer to each thermostat. This wire provides a continuous power supply to the thermostats. Connect one end of the common wire to the "C" terminal on the transformer and the other end to the "C" terminal on each thermostat.
5. Some zone valves have an end switch that can be used to control additional devices, such as a boiler or circulator pump. If you have end switches on your zone valves, you can wire them in parallel to control a common device. Connect the end switch wires from each zone valve together and connect them to the appropriate terminals on the device you want to control.
6. Once the wiring is complete, double-check all connections to ensure they are secure. Then, turn on the power and test the system by adjusting the thermostats and verifying that the zone valves open and close as expected.

It's worth noting that this is a general guide, and the specific wiring configuration may vary depending on the zone valve. If you're unsure about any aspect of the wiring or if you're uncomfortable working with electrical components, it's best to consult with a professional HVAC technician or an electrician. They can ensure that the wiring is done correctly and safely, and they can provide guidance specific to your system.

Let us know if that helps.

Best,

Zoe