Motor wont run

The systems are independent with the operation of a couple valves and a switch. The red represents coal unit, yellow is oil. The red checks are open during coal use, closed for oil, and vice versa. Switch on the wall, one on for coal, one for oil, while one is on, the other is off. I hope this helps.

Rob should I pull that fiberglass insulation off, to get some better pics? To see a possible bypass better? What is the function of the bypass? Am I right thinking it connects the incoming supply with the outgoing hot?

Is this green screw a ground for this wire?

Iza, The manual talks about drilling a hole 12 inches from the boiler base into the stack, but you're saying I should just fill that line that's already there with caulk? Will I know everything I need to know about the draft if I do that?

Hello Machinist82,

I was incorrect.

You need to be able to monitor the draft from both the fire viewing door
and the stack SO having a Dwyer probe connected to the low side of the
manometer with one hose will solve that for you.

You need to use the low side of the manometer not both sides as the
manometer will not work correctly.

With the stoker I have it only has an over fire draft hole in the fire
inspection door that is also used to light the fire like your EFM.

Machinist82 wrote: ↑

Thu. Jun. 20, 2019 5:29 pm

Is this green screw a ground for this wire?

Yes that is for the ground screw. Your timer and the boilers should be wired with 14/3 BX cable not romex.

So nepa, I've given some thought to using the pool as a high temp dump as well, there is an aquastat hooked into a well by the heat exchanger that heats the pool. It can only run while the filter pump is running. But how does a dump zone work? The aquastat at the pool is set on the side of the exchanger towards the pool, and set at 90, so I just turn it on with the filter pump when I'm ready to heat. To use it as a dump, would the aquastat have to be on the "hot" side of the exchanger towards the efm? Then set it to 205, and the high on the hydrostat on the efm to 210? I would have to leave the filter pump on indefinitely though. Am I thinking about this correctly?

Machinist82 wrote: ↑

Fri. Jun. 21, 2019 8:23 am

So nepa, I've given some thought to using the pool as a high temp dump as well, there is an aquastat hooked into a well by the heat exchanger that heats the pool. It can only run while the filter pump is running. But how does a dump zone work? The aquastat at the pool is set on the side of the exchanger towards the pool, and set at 90, so I just turn it on with the filter pump when I'm ready to heat. To use it as a dump, would the aquastat have to be on the "hot" side of the exchanger towards the efm? Then set it to 205, and the high on the hydrostat on the efm to 210? I would have to leave the filter pump on indefinitely though. Am I thinking about this correctly?

In simplest terms, an aquastat at the boiler senses over temp and turns on a zone. For my simple one zone system, a Honeywell l4006b aquastat is installed in a well on the boiler and is wired in parallel with my thermostat at the taco SR501. When temp goes above 220 or so, it closes and initiates a "call for heat" and with a 5 degree differential, dumps to 215.

I would think you'd need the dump aquastat on the boiler unless you plan on running the pump going to the heat exchanger 24/7. If the pump ran 24/7, you could put the aquastat anywhere along that zone.

Does your pool aquastat have 120v running through it or just low voltage thermostat wire? Mine just has thermostat wire... If your pool aquastat is controlling a 120v circuit, it complicates it a little...

I see you have oil plumbed in with the coal... I'm all for coal, but in your case, why not just burn oil during the summer?

Oh I see thanks, yeah the pool stat is low voltage. I just figured the coal is much cheaper than oil, and the efm lives in a seperate building over half an acre from the house, so not having the oil unit running in the summer, helps keep the temp down in the house too. But if I cant get this ironed out, that's just what I'll do, just burn oil in the summer. I just like options I guess

Machinist82 wrote: ↑

Fri. Jun. 21, 2019 11:48 am

Oh I see thanks, yeah the pool stat is low voltage. I just figured the coal is much cheaper than oil, and the efm lives in a seperate building over half an acre from the house, so not having the oil unit running in the summer, helps keep the temp down in the house too. But if I cant get this ironed out, that's just what I'll do, just burn oil in the summer. I just like options I guess

You'll just need to wire the new dump zone aquastat to trigger both the boiler side and pool side pumps for that zone...