Saturday Boiler Start up Day

So Saturday was boiler start up day, things did not go as well as one would like. I got all the last minute tweeks done, and set all the parameters that are in the manuel. I started a nice fire with charcoal, feed it with some coal, and we were on our way. The water was heating quickly, so I decided I needed to readjust the coal feed, I could not remember where it was set, so I decided to start from lowest feed rate and go up. I turned the rod counter clock wise, and the next thing you I have the rod in my hand the damn cap nut came off!! I was able to thread the rod back into the thing in the pusher, but not the nut. (I kept it running) Had problems with the cheap thermostat I bought, to larger of temp. swing from on to off, so I bypassed it. Could not figure out why the blower would not run on the furnace when there was a call for heat? I had a relay (a rib) tied into the TT terminals so when there was a call, it would energize the blower, only to figure out when the TT terms. call for heat their voltage drops out. So I wired it to the feed side of the circ. pump term. (That worked) The water temp. over shot and my 4006 did not start my circ. or blower, figured out I ordered the wrong one, I ordered a 4006A, not a B. (A is a low limit) I grabbed the old one that the previous owner had installed, put that in only to find out it was an A also. So I bypassed it, and sat in the basement for 4 letting it run, and trying to figure out how to controlled it. Then I shut it off for the night.

Today I installed a better T stat, fired it up, things were going better, then the relay controlling the blower quit working. So every time the T stat called for heat I would twist the wires for the blower so it would run. I was able to run it for about 4 hours, and get a littler better handle on how to controll it. Big learning curve with these. I let it go out again until I can get the 4006B, and another relay for the blower. Likely won't started until next weekend when I have time to babysit it!!!! All in all I think it was still a success.

Yep, it's a learnin process T--no matter how good any of us think we are, theres always more to learn. Ya done good!

T,

Here's a stupid question, What the heck are you running that is giving you so much trouble? Your profile shows a Hitzer and you mentioned a furnace and a blower, but you also mentioned water and an aquastat?

It also sounds like you powered this blower off of the circ pump from the triple aquastat? I think that would burn up the aquastat, depending on the current draw of the blower.

Need a little more info please.

-Don

Sorry, I am switching from my Hitzer to KAA-2 with a coil in a new propane furnace. I had been asking questions in previous posts about the install, did not think to add that info to this post.

Tryingitout wrote:Sorry, I am switching from my Hitzer to KAA-2 with a coil in a new propane furnace. I had been asking questions in previous posts about the install, did not think to add that info to this post.

OK, so a Keystoker KAA-2 boiler pushing water to a coil in the ductwork. Your blower should be actuated when the coil gets hot. You need something that can sense that the coil is hot and trigger an appropriate AC connection to the blower. An aquastat on the coil triggering a relay for the blower is the most common way to archive this.

-Don

Don, the TT terminals start the circ. pump when the T stat calls for heat, I would assume the blower would start at the same time. Either off the TT terminals or circ. terminals.

Tryingitout wrote:Don, the TT terminals start the circ. pump when the T stat calls for heat, I would assume the blower would start at the same time. Either off the TT terminals or circ. terminals.

The TT terminals are in input, not an output. The circ terminals are to power a circ pump. Furnace blowers tend to draw a bunch more current than a pump.

You really don't want the blower to come on until the coil has heat in it anyway. Otherwise, your just blowing cold air. That is why it would be nice to control the blower off of coil heat rather than boiler controls.

Aquastat senses a heat call through its TT terminals, turns on the stoker and the pump. heated water is pumped to the coil, once the coil gets hot, the blower turns on.

-Don

The relay I was using before it quit, only closes a switch, so it makes the blower circuit using the furnace power. The funny thing about the Keystoker TT terms. is there is 28 volts when there is no call for heat, when there is a call from T stat, there is no longer and voltage!

The coil in the furnace has less that 10' pipe, only temp. that seems to be lost is what is in the coil only

Nothing funny about that at all. The 24 volt circuit is open until the thermostat closes it. That applies 24 volts to the internal relay on the aquastat. That's why I said the TT terminals are an input, not an output.

-Don

It took a little time for me to figure that one out. I was trying to power the relay off that, because when I tested the terms. they had power. I would like to find a latch relay that would hold open the blower circuit when there is power at the TT, and completes it when power is lost, so the furnace blower circuit is made. I am not very good with controlled work.

That is possible with a cube relay but what Don is saying is the best solution. And simple.

Kevin

A B aquastat would prevent the blower from running until the water is hot. It makes on temperature rise.

What is your primary control? A honeywell triple aquastat?

The B aquastat is high limit, for over fire. Starts circ. and in my case the blower, in the event of over temp.

Don, are you suggesting a strap on style aquastat, or a well? Would it be a low limit or high limit? I am use the furnace transformer for the blower circuit, I only need to close the connection.

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