I recently bought this house, which has an oil furnace and also a wood furnace, and Itasca WB410. Last night I fired it up, and it did not behave the way I expected. Either I am doing something wrong (pretty likely) or something is broken. The boiler in question:
The only obvious control on the front is the thermostat on the left, with a chain going to a damper.
In the water lines going from the oil furnace to the wood furnace, there are two valves, one with a note on it:
The notes says that valve should be closed when the wood is fired. It seems pretty clear that the valve on the left needs to be open. It used to have a tag on it as well, but it is ripped off.
When I fired it up last night, I set the valves as stated. I don't think that water was flowing properly through the boiler. The thermometer on the front of the boiler pegged to the right, and the high pressure valve released, sending some hot water onto the floor.
It seems there must be another valve or switch somewhere that I am missing. There is a valve on the other water line on the back of the boiler, and that is open.
Any idea what is going on? The only other controls I see are under a cover on the front of the boiler, and look like this:
![Need help with Itasca WB410 boiler Need help with Itasca WB410 boiler](https://www.hearth.com/talk/data/attachments/119/119704-52db8a5160de6306fcdcf04acc50a947.jpg)
![Need help with Itasca WB410 boiler Need help with Itasca WB410 boiler](https://www.hearth.com/talk/data/attachments/119/119702-b064d653bfc297b79c94fd6414a36de5.jpg)
The only obvious control on the front is the thermostat on the left, with a chain going to a damper.
![Need help with Itasca WB410 boiler Need help with Itasca WB410 boiler](https://www.hearth.com/talk/data/attachments/119/119705-8ee696c746d1b23ceb323d2677a1c6e7.jpg)
In the water lines going from the oil furnace to the wood furnace, there are two valves, one with a note on it:
![Need help with Itasca WB410 boiler Need help with Itasca WB410 boiler](https://www.hearth.com/talk/data/attachments/119/119706-5eaa9fa41c2d66f46652ebedcd5e735b.jpg)
The notes says that valve should be closed when the wood is fired. It seems pretty clear that the valve on the left needs to be open. It used to have a tag on it as well, but it is ripped off.
When I fired it up last night, I set the valves as stated. I don't think that water was flowing properly through the boiler. The thermometer on the front of the boiler pegged to the right, and the high pressure valve released, sending some hot water onto the floor.
It seems there must be another valve or switch somewhere that I am missing. There is a valve on the other water line on the back of the boiler, and that is open.
Any idea what is going on? The only other controls I see are under a cover on the front of the boiler, and look like this:
![Need help with Itasca WB410 boiler Need help with Itasca WB410 boiler](https://www.hearth.com/talk/data/attachments/119/119704-52db8a5160de6306fcdcf04acc50a947.jpg)