Buffer tank answer to short cycle boiler

Bobcat_2

New installation of 5-6,000 sq.ft. of entry and pool deck snowmelt at a resort. 1MMbtu copper finned tube, on-off (wish I would have ordered a two stage) that creates heat very quickly but my temar 664, two zone injection control does not delver the heat fast enough due to boiler protection and cold start up I suppose. Would a buffer tank, say a 120 gal, connected in series in the primary (boiler) loop extend firing and minimize short cycles? I've never used a buffer before. Siggy shows a seperate pump, etc, when other loads are connected. This is a stand alone system. If the buffer and connecting piping reaches adjusted limit at 160 degrees, then am I back to square one? Maybe spread the on-off differential? Any ideas out there to create a successful installation? Cold toes in Oregon.

Unknown

what size pumps.

are you getting enough flow through the boiler. what size is the injection line? What size are the pumps? What are you protecting the copper fin tube boiler from? There should be no bypass required for water temp. just for high flow. Check the install guide. How is it piped?

You might not need a buffer tank at all.

hot_rod

With that much snowmelt

that boiler should run pretty much non stop, if all the pipes and pumps are sized correctly I'd guess you provide 125- 130 btu/ square foot of slab.

If you have a two zones and the potential for one to call expect some cycling. a 1 million BTU boiler running 80% efficiency plus any altitude derate =??

Check the numbers to be sure you have enough tube in the slab to move about 800K, then the pipe size to handle the needed flow rates, and the pump capacity to drive it all. Remember about the derate for the glycol mix when sizing.

A properly placed buffer could help, a mod con boiler would be better

hot rod