Table of Contents
What are the yellow wires in a zone valve?
At HONEYWELL ZONE VALVE INSTRUCTIONS we describe how the red and yellow wires for a zone valve are usually connected: One yellow wire connects to the C terminal on the low voltage transformer. The second yellow wire connects to a “heat on” wire from the room thermostat.
Can zone valves be installed upside down?
The valve can be installed vertically or horizontally, but not turned upside down.
What happens if you put a zone valve in backwards?
Zone valves are designed to close gently while opposing the force of the water flow in the pipe. Most are spring loaded. If the valve is installed backwards, the flow of water catches the closure ball, overrides the spring, the valve snaps shut, and the water slams to a halt.
Does central heating pump go on flow or return?
Below is a basic schematic drawing of how a central heating pump sits within a heating system. Please note that the pump can also be installed on the common return.
Are Honeywell zone valves compatible with Flair and white Rogers?
The Honeywell zone valves are NOT compatible with Flair and White Rogers unless you follow careful wiring details. I give an example above, but you may need to review wiring with the manufacturers of your zone valves. Zone-A-Trol Valves should not be wired in the same circuit with zone valves of a different make or manufacturer
How are Flair zone-a-Trol valves wired?
The Flair Zone-A-Trol valves in the company’s wiring diagrams are typically shown wired in parallel. How Are Multiple Zone Valves Wired? On installations where it is not convenient to wire from valve to valve as in the diagram, a separate 3-color wire conductor can be run from terminals 1, 2, 3 of each zone valve to a convenient junction point.
What are the Red wires on a zone valve for?
Red wire connections at the zone valve: the pair of red wires are “end switch” wires used to energise an external relay that turns on the circulator. The other red wire conects to one side of the external DPDT relay that operates the circulator pump.
What terminal is the common wire on a Honeywell zone valve?
The Common wire, NOT the Load side of the low-voltage transformer is taken to Terminal #2 on the White Rogers and The Common is taken to the Yellow Honeywell zone valve wire. The other yellow wire is common to the thermostat. The correct wiring depends on the zone valve models.