Honeywell Zone Valve

Paul Rohrs_4

Is the V8043F series compatible to a ZVC406 Taco zone-valve controller?

I would just like to simplify wiring with a singular control board instead of daisy-chaining all of the end-switches to the pump relays R-W terminals. The secondary loop was re-piped with a differential bypass to bleed off the extra flow as zone-valves open and close.

To simplify my question, can I use this zone valve in a 2-wire application? (4-wire?) The zone valve is a V8043F1036 and the attached PDF (page 16) is about the only clarity I can find.

Thinking about it and trying to answer my own question, it seems that I should be able to use terminals 1 & 2 of the Taco ZVC to wire in the TH and TR terminals to power open and close, jumper 3&4 on the ZVC controller for end-switch, and run my T-stat leads to the R&W of the ZVC. (?)
Or a variation in 4-wire would be to use the E-S on the zone-valve and wire that to terminals 3&4 instead of jumpering it on the ZVC control.

I posted this below to Carol since it is a Honeywell ZV, but I think she is on vacation.

Regards,

PR

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Jim Eastman_2

ZVC406

Hi Paul,

The 4 wire Honeywell zv works great with the 406 Zone Valve Control. Wire terminals 1 & 2 to the yellow (24V) 8043 wires and the end switch (red wires) to terminals 3 & 4 of the respective zones. Closing the connection between any of the 3 & 4 terminals will close the "Main End Switch" relay that needs to be connected to the " T - T " terminals on the boiler or other device to be activated. If you patch the #3 & #4 terminals, the "main end switch" will be closed all of the time. I don't think this is what you want. The 4 wire zone valves are real simple and neat with this Zone Valve Control! You may want to jump the #3 and #4 terminals on Zone #6 if this is your domestic hot water priority zone and you are using a circulator instead of a zone valve. In this case you will use the "Extra End Switch" and the "N/O & Com " dry contacts on the Zone 6 Relay to bring the Dhw circulator and system circulator on.

I love this xone valve control! It really simplifies wiring, trouble shooting and provides a very professional installation!

Jim Eastman
Marmot Heating
Red Rocks Community College

Jim Eastman_2

Addtl. info

Sorry Paul! I just noticed that you have the "F" model of the 8043 zone valve---no yellow wires! If you connect the #1 and #2 terminals on the Taco Zone control to the "TH and TR" terminals on the zone valve terminal board, that would be the same as wiring the same two terminals into the yellow wires of a V8043E zone valve. The end switch teminals on the valve control board should be wired to the #3 and #4 valve control board terminals for that same zone.

Jim Eastman

Joe Mattiello

ZVC boards

Hi thank you for using the Taco products. The ZVC board at any capacity is a great facilitator for wiring the thermostats, and the corresponding zonevalve. If you want to use the motor terminals only, you have to jump terminals 3 and 4 on the zone that the valve is connected to, to enable the main end switch that fires the boiler. The extra set of dry contacts, on the ZVC 404, 406, and 403-EXP work with the priority zone only. The N/O would energize the domestic pump, and the N/C, the system pump. Now bring a hot leg into one side of the extra end switch, and the other side into the Common terminal, using the extra end switch as the switch. For your reference I have attached the Taco zone control wiring guide. Please refer to page 26 for a similar wiring diagram.

Taco, Inc.
Joe Mattiello
Technical Service Technician
joemat@taco-hvac.com
401-942-8000 X 484
www.taco-hvac.com