What is the S wire on a thermostat?

What is the S wire on a thermostat?

S, S1, S2: These wires run directly outside and provide outdoor temperature information to the thermostat.

Does R go to RC or RH?

In a thermostat, the R wire is responsible for powering the entire HVAC system (through a transformer). If you have both an Rh (Red-heat for powering the heating) and an Rc (Red-cool for powering the cooling), then the R wire can be connected to either Rh or Rc.

Why is there a jumper between R and RC?

Effectively there isn’t a second RH wire, although there is an RH terminal. However, the heating still needs to be controlled, so a wire known as a jumper is connected between the RC and the RH terminals so that power gets to the heating control part of the thermostat. This wire is also known as the RH wire.

Is it bad to leave a zone valve open?

Can you leave zone valve open? Leave the zone valve in the manual open position and it will get heat when any of the other zones call for heat. Some zone motors do have end switches that stop them in either the open or closed positions but these will have a three-wire control.

Where can I find a wiring diagram for a sundial?

Our Wiring Diagrams section details a selection of key wiring diagrams focused around typical Sundial S and Y Plans. Contains all the essential Wiring Diagrams across our range of heating controls. Click the icon or the document title to download the pdf.

Can a zone panel be connected to a thermostat?

The HZ432 offers many innovations for wire management and organization: wires can be run behind the panel, through wire channels on its sides, and must be attached to a wiring anchor with a cable tie. M24743 Install thermostats using instructions provided with thermostats. If using wired thermostats, connect thermostat to zone panel.

What are the specs for a zone panel?

Voltage: 18-30 VAC 50/60 Hz transformer of 40 VA or more. Current Draw: Zone Panel: 8.5 VA max. THM4000 Wireless Adapter: 2 VA max. All VA specifications at 24 VAC. Wiring: 18- or 20-gauge solid (not stranded) wire. Humidity Ratings: 5% to 90% RH non-condensing.

How to wire dampers to a zone panel?

To con- nect wire to the panel, strip approximately 1/4 in. of insulation and push wire into terminal. To release wire, press the button on top of the terminal. 3 Install dampers using instructions provided with dampers. Connect dampers to zone panel. NOTE:Multiple dampers can be wired in parallel.

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