Different boiler controller needed when eliminating a tankless water coil?
#1
10-30-13, 09:34 PM
Different boiler controller needed when eliminating a tankless water coil?
I have a Utica Starfire 3 that was in my house when I bought it. It's one of two furnaces in the house (2 family house). It has a tankless coil built into it for hot water for one tenant. I just recently installed a new water heater because the tankless just wasn't able to deliver the necessary hot water and I don't like firing up the boiler all summer to provide hot water.
I want to keep the changes to the boiler minimal, so I would prefer to leave the tankless coil in. It will be bone dry inside because it isn't hooked up to the water system. I'm a little nervous to do it because I know that the Starfire 3 has a different temperature controller for units with a tankless water heater installed and ones without.
I have 3 options:
1. Install the new controller, remove the tankless coil
2. Plumb the tankless coil back into the plumbing system, just shut off the feedwater to it.
3. Stop worrying about it and trust that the temperature controller won't be negatively effected by the lack of water in the tankless heater.
Any input on this would be helpful.
Thanks
I want to keep the changes to the boiler minimal, so I would prefer to leave the tankless coil in. It will be bone dry inside because it isn't hooked up to the water system. I'm a little nervous to do it because I know that the Starfire 3 has a different temperature controller for units with a tankless water heater installed and ones without.
I have 3 options:
1. Install the new controller, remove the tankless coil
2. Plumb the tankless coil back into the plumbing system, just shut off the feedwater to it.
3. Stop worrying about it and trust that the temperature controller won't be negatively effected by the lack of water in the tankless heater.
Any input on this would be helpful.
Thanks
#2
10-31-13, 06:18 AM
1. Install the new controller, remove the tankless coil
In any case there is no reason to 'remove' the tankless coil, simply disconnect the piping to the tankless coil. Do NOT solder caps to the pipes coming out of the abandoned coil, but rather just slip fit them on.
2. Plumb the tankless coil back into the plumbing system, just shut off the feedwater to it.
3. Stop worrying about it and trust that the temperature controller won't be negatively effected by the lack of water in the tankless heater.
#4
10-31-13, 12:55 PM
The one currently installed is a Honeywell L8124A. Here is the spec sheet on the two different controllers:
https://customer.honeywell.com/resou...0s/63-9419.pdf
Good point on not plumbing the water back into the system. I hadn't factored in things growing in the lines.
https://customer.honeywell.com/resou...0s/63-9419.pdf
Good point on not plumbing the water back into the system. I hadn't factored in things growing in the lines.
#5
10-31-13, 03:11 PM
I hadn't factored in things growing in the lines.
Legionella - Let me google that for you
Water-borne cysts - Let me google that for you
Here's how to modify an L8124 to operate 'cold start':
