Rand and Reardon gas boiler

York101

HELP not sure what to do with wiring. I bought two taco sentry zone valves. But the wiring is confusing.  Do I need a control box just for the zone valves. What a pain, no service number to call. TIA
Any pictures please

pecmsg

What did you have before the sentry valves?

York101

Old style taco valve 571-2. But the old boiler had a 24v place to hookup valves.

EdTheHeaterMan

Zone valve wiring can be confusing. Are you replacing all the zone valves with Zone Sentry OR are you mixing them up in order to get really confused?

I can help either way.

@York101 what model number Rand and Reardon boiler do you have?

EdTheHeaterMan

@York101... Here is the old taco 571-2 valve diagram. Lets hope this is the way the old valves were wired

Lets look at only one valve at a time.
This is a simplified view of what is going on inside the valve actuator

Now lets look inside the Zone Sentry valve

By connecting the W/Y terminal to one of the end switch terminals you get identical wiring to the 571-2 wiring. 1, 2, and 3

Lets look at how to connect it to YOUR existing wires

Look in the green Zone Sentry illustration to the left of the original 571-2 in the diagram
See how the thermostat wire that went on #1 of the 571-2 will connect to the C of the Zone Sentry.
See how the wire from #2 on the 571-2 goes the the W/Y and one of the end switch wires/
See how the wire from #3 on the 571-2 goes on the remaining end switch wire
All the same as the 571-2

If you do not have the original wiring in a photo or have disconnected all the wires and cant remember where to start, send me a Private Message by clicking on my name in this post.

EdTheHeaterMan

@York101
How did everything turn out? Was the wiring help successful?