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Old 05-05-2010, 08:55 PM   #1
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Summer boiler temp question


I have a oil burner with a water heater. I read somewhere here that in the summer I could lower my hi / low setting because the boiler will not have to produce heat for the baseboard heating. If so what is a good hi/low setting . My water heaer is set at 120. Thanks

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Old 05-06-2010, 05:14 AM   #2
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Summer boiler temp question


The boiler should be wired so that it only fires when the water tank calls for heat.

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Old 05-06-2010, 06:30 AM   #3
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Summer boiler temp question


Do you have a water heater and a boiler.
Or a boiler with a tankless coil, or an indirect water heater attached to the boiler.
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Old 05-06-2010, 12:37 PM   #4
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Summer boiler temp question


I have a water heater and i believe a tankless coil boiler that has been disconnected. Does this pic help

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Old 05-06-2010, 04:51 PM   #5
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Summer boiler temp question


The control should have been changed to a cold start control which means a high limit setting only when the indirect water heater was installed. This means the boiler will only run when you have a call for heat or for hot water. The down side is the gasket may drip a bit when the boiler goes cold. I would replace the coil with a blank plate and new gasket.
If you don't want to do this due to expense than lower the low side as low as it goes with a 25f differential setting. Do not turn it up in the winter. Keep the high limit at 180 - 200. This only comes into the picture when there is a demand.
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Old 05-06-2010, 05:05 PM   #6
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Summer boiler temp question


The control still has a low high and dif setting. And u are right about the leaking but only when it gets below 100. Where would i buy a blank and gasket for this boiler. Also Iam little confused on what you suggested. Why do i need to keep the boiler hi at 180 if when the water heater calls for water its set at 120 at the water heater. Does this make sense
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Old 05-06-2010, 05:27 PM   #7
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Summer boiler temp question


Your water heater doesn't have a burner, does it.
If not, its a indirect water heater. that uses your boiler to heat the water.

You may be able to set the boiler temp lower. Depends on how much of a hot water demand you have.

If your indirect is set to 120, the boiler needs to be set higher. So that it can heater the water to 120.
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Old 05-07-2010, 02:24 PM   #8
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Summer boiler temp question


Looks to me like he's got a tankless coil in the boiler which means the temperature can't be lowered much past 160
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Old 05-07-2010, 02:31 PM   #9
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Summer boiler temp question


Tanklees is disconnected.

You can see that there is no pipe connected to the mixing valves mixed water port.

And what look like an Aliance indirect is also in the room.

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