Multiple Zones With AA130

Good morning all,

We'll be starting the installation of an Axeman-Anderson 130 this week. (We had a frost the other night. Got to get this dome soon.)

I'm not familiar with how all of this stuff works. My house has four zones. The wiring instructions say to connect the room thermostat to the TT terminals of the L8124 aquastat. The question I'm hoping someone can help with - as I have four thermostats, do I connect all four of the to the one pair of TT terminals?

Thanks in advance.

Ed...

you can connect one zone to the L8124 and you would have to use a R845 relay for each additional zone.

ED, with four thermostats you probably have either four circulator pumps or four zone valves controling the heat zones..

NO, DO NOT hook all the thermostats to the one connection, this will make all the thermostats into one..

You need to either hire a plumber to help you with this. Or try to get the help of a forum member.

Every instalation is different, some simple some NASA-Style. You need to understand your system before you add on to it.

OR, you need to take photos of your system, the plumbing, the pump or zone valves.. etc etc..

Then you need to draw out your system's wiring on paper, and then figure out where and how to connect the systems..

Are you leaving your existing boiler in place?? If so you probably can leave all the existing plumbing, thermostats and possibly the circulator in place,, and just add the AA130 to the system..

But we need A LOT more info to help you..

This isn't really difficult, but it's not for everyone..

Post the general area you are located in,, and maybe you will find a volunteer or a suggestion for a good plumber..

hope this helps..

Greg L

Thanks Greg and U235.

I do have a plumber/heating specialist coming in. Here in MA you're supposed to use a licensed plumber and I wouldn't tackle this myself anyway. I just trying to get a few things prepped for him before he arrives later this week.

To answer your other questions - one pump with four zone valves on the existing oil burner. I'll be leaving all that infrastructure in place, but disabling the burner itself. (More MA zoning laws that don't ermit sharing a flue. No big deal, I don't want to burn any more oil anyhow.)

Ed...

OK, then you will be leaving the house thermostats alone, they control the zone valves..

Depending on what your plumber decides is best, he may install another circulator between the two boilers, or he may use the existing circulator to tie the two boilers together.. lots of variables, control possibilities etc..

Greg L.

One more question maybe you can help with. The documentation calls for a fused safety switch upstream of the timer so I picked up what is called Firomatic thermal switch. I wonder about this. If the thing got too hot wouldn't I want to keep power to it so that it maintained circulation to a dump zone we're planning to have? Or would the thermal switch just make it so that no more coal was fed?

Please excuse me if these are dumb questions. I'm a software guy and this qualifies as hardware. I'm just trying to understand how things work.

Ed...

I'm not sure, I'd have to look at it, read what it is designed to do..
Maybe another forum member can help?

Greg L

etribuna wrote:The documentation calls for a fused safety switch upstream of the timer so I picked up what is called Firomatic thermal switch.

If the power is off a breaker you are fine, they just want a shutoff switch at the unit for service.
The Firematic goes above the boiler and feeds the service switch, it shuts off power if there is a fire.