like the title says - should i empty my sidearm for the summer? like with the boiler not running will the hot water heater now be trying to heat the water in the zone for the sidearm?
empty the sidearm for summer?
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I heat the DHW with Solar, which works very well from about Mar 1-Nov 1. The DHW can easily be warmer than the boiler water on any sunny day in the shoulder season, and yes it will reverse thermo siphon. So, I put a swing gate check valve to prevent reverse flow in the lower line that connects the tank to the side arm. I can also valve both lines off, but thats a bother since it could happen anytime.
A lot of pipe insulation really helps too.
A lot of pipe insulation really helps too.
The sidearm holds a tiny volume of water compared to any DHW. Pretty sure it's not worth worrying about, especially if your sidearm is insulated and you have zone valve(s) that you can turn off to prevent heating the entire boiler loop.
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