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philipb

03:24AM | 03/05/03
Member Since: 03/04/03
44 lifetime posts
Bvhvac
I am replacing my force air heating system with a baseboard system. I will be installing multiple zones. My furnace is a Weil McLain CGi Series 2 furnace, with Taco 009 circulator pumps (per zone), and Honeywell Zone relays and valves (this is a single unit) (per zone). The furnace has one (two wire) wire coming out of the side with a "To Thermostat" label on it. How do I wire the multiple thermostats to the multiple Tacos and Relays, to the furnace. I have been pouring through all the documentation and can not seem to figure this out.

Any help is greatly appreciated.

Thanks,
Phil

philipb

04:43AM | 03/05/03
Member Since: 03/04/03
44 lifetime posts
Thanks,

Two more questions...

Does that mean that the thermostats (in each room) connect to the zone valves (relays)?

Then how does the furnace know which pump to run? I have one pump and one zone valve per zone.

Thanks,
Phil

philipb

05:02AM | 03/05/03
Member Since: 03/04/03
44 lifetime posts
Perhaps I mistated the component name, but the page provided in your link:
http://64.226.150.132/hydronic/multcirc/multcirc.htm

is my exact design - a multiple series circuit using pumps.

The Honewell relays that I described in my initial post, are installed "in line" (in the pipe), and are essentially automated valves that open or close depending upon the call for heat to that zone. Perhaps I shouldn't have refered to them a "relays".

Phil

philipb

03:07PM | 03/05/03
Member Since: 03/04/03
44 lifetime posts
Let's forget aabout the Honeywell zone valves for a moment.

I have a multi zone system, with one taco pump per zone. Don't I need a multi zone control panel and acquastat to control each zone? Or can I really simply wire the pumps and thermostats in series to the two sets of leads (respectively) coming out of the furnace?

Thanks,
Phil

philipb

07:21AM | 03/06/03
Member Since: 03/04/03
44 lifetime posts
Thanks, the Taco circulator relay is "the goods".

Just to verify the wiring, I presume it should go like this.

1) Regular 110V house current to the Weil McLain CGi unit.
2) Regular 110V house current to the Taco circulator relay.
3) Thermostats to the Taco circulator relay.
4) Taco circulator relay to the Taco pumps.
5) Taco circulator relay to the thermostat leads coming from the Weil McLain CGi unit.

And then, cap off the one set of cirulator leads coming from the Weil McLain CGi unit.

Does that appear correct?

Thanks again for all your help,
Phil

P.S. I almost forgot. Step 6) Return the Honeywell Zone Valves!

philipb

03:05AM | 03/07/03
Member Since: 03/04/03
44 lifetime posts
I picked up the Taco circulator relay last night. Seems pretty straight forward.

Just one more question....the relay shows two terminals that are marked "X" and also marked "End Switch". On the instructions, these show as being connected to "TT on Boiler", or "TT on the Acquastat". Do I connect these terminals to the CGi boiler's thermostat connection, or add an Acquastat into the picture (not sure what an Acquastat is anyway)?

Thanks,
Phil



philipb

06:05AM | 03/07/03
Member Since: 03/04/03
44 lifetime posts
Regarding the flow check valves you recommend, do they get installed before or after the circulator pumps?

Phil

philipb

07:36AM | 03/07/03
Member Since: 03/04/03
44 lifetime posts
Let me clarify my prior post - do the flow valves install on the input side, or output side, of the circulators?

Phil

philipb

09:47AM | 03/10/03
Member Since: 03/04/03
44 lifetime posts
I installed the Taco relay and flow check valves this weekend and it went well. Thanks for all your help.

After I swapped the zone valves with the flow valves, I realized that I could have probably kept the zone valves there. They are closed when not powered, and if I figured a way to get them 24 volts power (maybe a transformer between them and their circulator pump), then they would only open when their zone is activated. This would essentially provide the same service as the flow check valves - preventing backflow when one zone is on and another if not.

But then, more "stuff" to brake down I suppose.

Thanks again,
Phil

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