Navien 190 wirings white Rodgers zone valve

Mrcohort

Good morning I have a Navien 190. It’s the new one in the manual it says why are the thermostats to normally open and Comns and then two wires to the zone valves well the white Rogers valves need three wires so I need a wiring diagram on how to wire the white Rodger zone valves, please

Big Ed_4

I think your confused with the end-switch wiring .

On all zone-valves there is a end switch . When the valve fully opens a switch will close. Sends a signal back that there is a call for heat …

You have one circuit to open the valve and a second circuit for the signal back …Both need a common . If the two circuits are running on the same voltage you share the same common …

Hope this helps

hot_rod

A relay box will simplify wiring those WR valves. Thermostat wires to the top of the relay, valve wires like this.

Mrcohort

well I appreciate you guys getting back to but the newer have common normally open normally closed on the top where the thermostat has red white so I’m guessing it would be wired different than the diagram that you have correct?

pecmsg

forget the colors on the wires.

hot_rod

Common NC and NO sounds like a relay output connection?

The wiring shown above is specific to that relay box

Although the concept would be the same on any brand relay box

EdTheHeaterMan

White Rogers 3 wire zone valves like the 1311, need a thermostat that also has three wires.  If you are using the original WR thermostats the wire terminals are labeled 4, 5, and 6 and get connected to the 4, 5, and 6 terminals on the zone valve.  If you have another thermostat then you need to have a thermostat with 3 terminals that are usually labeled R W and Y.  R gets connected to 4 on the zone valve, W gets connected to 5 on the zone valve, and Y gets connected to 6 on the zone valve.   It is basically a Power Open/Power Close situation. Here is the explanation of that valve actuator operation:

The schematic shows the valve in the closed position. As the thermostat calls for heat, the valve motor is energized and begins to open the valve. Soon thereafter side “A” of motor switch makes with the holding contacts. This contact provides a holding circuit to prevent the valve from stopping part way through its cycle if the thermostat is changed to the satisfied position. Just before the valve reaches the full-open position, side “B” of motor switch closes (providing a low voltage auxiliary circuit for starting burner and/or circulator). The motor stops with the valve in the open position when side “A” of motor switch breaks the holding contact. (Completing a circuit through contact “6” and the thermostat anticipator.)

When thermostat is satisfied, the valve motor is again energized. Just after the valve starts to close, side “A” of motor switch makes with holding contact providing a holding circuit. The side “B” of motor switch opens (breaking auxiliary circuit), and side “A” of motor switch makes with contact “4” then breaks the holding circuit stopping the valve in the closed position. (Fig. 2) The contact arrangement is constructed so that when the shaft of the motor revolves 90° a new set of stationary contacts makes while the old set breaks. 

The three wire setup has nothing to do with the end switch that powers the burner/circulator circuit.  All you need to remember is to connect the thermostat to make the valve operate properly which includes connecting the 24 VAC transformer to terminal #1 and 2 on the zone valve.  Once you have that done and operating properly, then all you need to operate the burner/ circulator relay is 2 wires from the zone valve terminal 2 and 3 to the boiler control (where you might put a 2 wire thermostat if there were only one zone)

I hope this helps.