Adding Taco ZVC404
#1
02-05-23, 08:25 AM
Adding Taco ZVC404
WM GTO-4 boiler with L7224U a'stat.
3 zones (Honeywell V8043's) + IDHW
All seems to work fine...but since I can never leave well enough alone, I'm thinking about adding a ZVC404...essentially for 2 reasons:
1. Having the IDHW on 'priority' seems like a groovy idea
2. The wiring from the 3 ZV's goes into an insane rat's nest that drives my OCD absolutely nuts
(and 3... I really like blinky flashy LEDs)
Anyway - the wiring / installation looks pretty straight-forward - but I do have one quick question:
- On the ZVC404...does the ISOLATED END SWITCH go to the TT terminals on the L7224?
The diagram says "To boiler aquastat relay TT"...which I think is the TT terminals on the L7224...but I wanted to ask, just to be sure.
Thanx in advance! Wally
3 zones (Honeywell V8043's) + IDHW
All seems to work fine...but since I can never leave well enough alone, I'm thinking about adding a ZVC404...essentially for 2 reasons:
1. Having the IDHW on 'priority' seems like a groovy idea
2. The wiring from the 3 ZV's goes into an insane rat's nest that drives my OCD absolutely nuts
(and 3... I really like blinky flashy LEDs)
Anyway - the wiring / installation looks pretty straight-forward - but I do have one quick question:
- On the ZVC404...does the ISOLATED END SWITCH go to the TT terminals on the L7224?
The diagram says "To boiler aquastat relay TT"...which I think is the TT terminals on the L7224...but I wanted to ask, just to be sure.
Thanx in advance! Wally
#2
02-05-23, 08:35 AM
Mods - just realized I may have put this in the wrong forum (didn't see the 'boiler' section.
Please feel free to relocate it if necessary.
Thanx!!
Please feel free to relocate it if necessary.
Thanx!!
#3
02-05-23, 10:53 AM
Group Moderator
Thread moved.
It's all about the flashy lights.
To the boiler TT takes the place of terminals 2 and 3 on the Taco valves.
It's all about the flashy lights.
To the boiler TT takes the place of terminals 2 and 3 on the Taco valves.
#5
02-05-23, 01:56 PM
Group Moderator
Same thing.... uses the red wires from the Honeywell valves.
The red wires go to the controller along with the yellow wires.
The TT output replaces the red wires.
The red wires go to the controller along with the yellow wires.
The TT output replaces the red wires.
#6
02-06-23, 06:41 AM
Thanx PJ! The thermostats and ZV's are easy peasy.
But my question is specifically regarding the ISOLATED END SWITCH (basically the main end switch on the ZVC404). Take a peek at this: https://s3.amazonaws.com/s3.supplyho...structions.pdf
...along the top - left of the thermostat terminals.
Pretty sure it goes to the TT term on the aquastat (so the boiler can 'do it's thang.'
Thanx!
Wally
But my question is specifically regarding the ISOLATED END SWITCH (basically the main end switch on the ZVC404). Take a peek at this: https://s3.amazonaws.com/s3.supplyho...structions.pdf
...along the top - left of the thermostat terminals.
Pretty sure it goes to the TT term on the aquastat (so the boiler can 'do it's thang.'
Thanx!
Wally
Last edited by Wally107; 02-06-23 at 07:47 AM.
#8
02-06-23, 08:38 AM
Thanx rbeck!! One of those "I-know-the-answer-but-better-ask-since-I-ain't-a Pro" things.
Even tho I'm not a Pro - I'm pretty handy, and comfortable doing this...not much to it.
Thanx again!
Wally
Even tho I'm not a Pro - I'm pretty handy, and comfortable doing this...not much to it.
Thanx again!
Wally
