DIY Chatroom Home Improvement Forum

DIY Chatroom Home Improvement Forum (
-   HVAC (
-   -   Summer boiler temp question (

dontilgon 05-05-2010 08:55 PM

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

NHMaster 05-06-2010 05:14 AM

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

beenthere 05-06-2010 06:30 AM

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.

dontilgon 05-06-2010 12:37 PM

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

tk03 05-06-2010 04:51 PM

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.

dontilgon 05-06-2010 05:05 PM

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:huh:

beenthere 05-06-2010 05:27 PM

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.

NHMaster 05-07-2010 02:24 PM

Looks to me like he's got a tankless coil in the boiler which means the temperature can't be lowered much past 160

beenthere 05-07-2010 02:31 PM

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.

All times are GMT -5. The time now is 05:09 PM.

vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.

Search Engine Friendly URLs by vBSEO 3.6.1