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[american-pacemaker]

I have a primary secondary system with-
7- secondary zone pumps
1- primary pump
1- inside boiler pump
1- outside wood boiler pump
Do all these pumps get wired thru the taco switching relay ? I need to order the proper switching relay's

Slim I think I gave you the wrong information yesterday when I talked to you about these.

[american-pacemaker]

Hey Slim could you help me on this one ?

[slimjim]

OK Larry, I was actually waiting for other ideas but here goes. outside wood boiler circ and inside primary circ both get wired to seperate toggle/light swithces, inside oil/gas boiler circ gets wired to the C-1 terminal on your boiler aqua-stat ( this circ only operates when your oil/gas boiler is up to temperture and there is a call for heat) and is not used when heating with wood. The remaining 7 loop circs would be wired through the circulator relays to control the zones, my choice for relays would be 2 Taco SR 504 EXP circulator switching relays with the capability to expand for future use, I would use 2- 4 zone instead of a 6 and 2 as they will look better and I'm not sure if they make an 8 zone.

[american-pacemaker]

I thought there would be some reply's also but no one jumped in. So you run the primary pump all the time also and not just on a call for heat ?

[slimjim]

You can run the primary through the XX terminals on your relay and it will come on only on a call for heat but you should expect a delay in delivering the heat to the loops, The XX terminals are a set of dry (isolated contacts) that make connection on any call for heat, one side of this contact would come from the Toggle/light switch and the other terminal would power up the primary loop circulator!

[american-pacemaker]

Thanks Slimjim, I don't like to bother you with questions but I do want my system to be right the first time.

[slimjim]

LARRY! You sir are a long way from being a bother, I was only sitting back and waiting for others to have a shot at it, would you like for me to see if Bell has an 8 zone relay in Albany? I will be @ the Biddeford store this morning and could get them in Albany to release it through my account if you like.

[american-pacemaker]

Thanks for the help. I looked and Taco doesn't make an 8 relay switch. I am going to put in two of the 4 relay switches. I have been ordering from a company called PEX SUPPLY and there prices are almost impossible to beat. Should I get one expandable and one
not expandable or two expandable ?

[slimjim]

I doubt there is much price difference between the EXP and non so I would go for both EXP

[american-pacemaker]

Thanks, I can almost see the light at the end of the tunnel on my install. 

[slimjim]

It's a long journey BUT you have gained lots of knowledge, had fun and made friends, not to mention spent lots of hard earned money on your investment, Thank you for trusting in me Larry!