I have been asked to fit a twin coil solar cylinder for a contractor, went to look at the job today, current cyl is heated by a Janus circulator on gravity. Can anyone think of a reason not to fit an unvented cylinder in this situation? Do you think that fitting a 2-port valve in the gravity circuit presents a safety issue? My concern is that the circulator has no electrical control, just a mechanical gas valve. While the 2-port valve will satisfy G3, is it acceptable to prevent the circulator flow?
janus circulator
- Thread starter solarnut
- Start date
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M
mysteryman
I should leave this one alone. Water circulators were intended to go on direct connections to a vented cylinder.
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You can buy Open Vent Solar tanks you know!!! this is the only answer to this situation 
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