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I am installing a gas boiler with 2 zones the house never had one it had a space heater so I am installing evrything the boiler manual says to install the expansion tank 18" away from the boiler, the boiler is in a tight spot how important is the 18"? I cannot find any info online related to exact locations for the install does it need to be above the boiler?
I have a 47000 btu gas boiler 2 zones heating a 2nd flooor apartment boiler is in the basement about 45 feet of baseboard
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Comments
The expansion tank connection should be close to the inlet side of the pump, regardless of where it is located supply or return.
The tank itself could be mounted remotely, just pipe to it with 1/2" copper or pex.
The air elimination devise should be on the supply side of the boiler, the hottest point in the system.
As esc mentioned a micro bubble type separator is ideal, no piping distance required in front or downstream of that type air eliminator. they do a much better and faster job of removing air, compared to a cast iron ramp type air purger.
Plenty of good brands of separators out there, here is one with unique features.
trainer for Caleffi NA
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