Crown Freeport CT

psd_3

Anyone have experience with the Crown Freeport CT? It's being recommended by my heating contractor for a retrofit installation. Is it a reliable choice over a standard PIN type boiler? Does it operate well with the standard Beckett AFG burner?

The Crown manual shows the circulator(s) on the return side, but my configuration may have them on the supply side. Are there specific issues with locating the circulators on the supply -vs- return side? Also, how necessary is a bypass loop for a conventional (low mass) base board radiation installation?

Ray M

Freeport

Great boiler. I prefer the reillo burner. You dont need a bypass for base board. Pump should be on the suppy the manual shows it as alternate. Good luck Ray M

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psd_3

Freeport Venting

Ray,

Thanks for the response. From your pictures I see that you have also use the Beckett AFG in some Freeport applications. My contractor prefers the Beckett (based on experience), although you prefer the Riello, have your results been reasonably good with the Beckett?

I second question with regarding a venting concern ... I would require the CT-35 at a firing rate of 1.0GPH for my heating load. My existing chimney has a 5" flex SS liner from top to bottom (about 30') and the boiler would within 4' of the flue connection. The CT-35 requires 6" breeching, so I'm assuming that a 7" to 6" reducer could legally go on the boiler, the 6" breeching would run to the flue connection (with barometric in the vertical run). A 6" to 5" reducer would be used at the flue connection. Any major issues jumping out with this approach?

David_5

No can do

Page 5 in the manual says the chimney minimum is 6" and 15'for the CT-35. Ask the contractor about installing a bigger liner or get the Freeport in a direct vent model.

David

DaveGateway

Freeport Venting

Yes - I saw that also, but perhaps that's the conservative view? It would certainly hold true for a 15' chimney, but 6" seems overkill for 30'.

The reason I ask is because the capacity of a 5"D 30'H liner for a single appliance running at 1GPH and 84.7% efficient seems like it should work based on the venting tables I've seen from the liner manufactures. Based on NFPA31, a 5"D 25'H liner should be able to handle a burn rate of 1.06 GPH for an appliance running at 84% efficient. A 30' liner should have greater capacity. I think it's really related to drafting performance as the liner capacity goes down as the applicance efficiency goes up. In other words, not enough heat output to induce sufficient draft.

DaveGateway

You're probably right, but

Manufacturer specs must be followed or any problems would void your warranty. I would get an OK from Crown first.
A few other great 3 pass Scotch marine boilers have 5" flues like the Buderus G115. The Biasi B10 and SG have 6" breech but list 5" or 6" as both OK for 1GPM firing. Seems like most of the smaller boilers use 5" flues now a days,

Ray M

Freeport

The becketts run fine. I think the reillo is the best burner for that boiler. Why use the CT-35 ? This is a upfired 3 section. Go with a CT-3 or CT-4 for better eff.Just my 2 cents worth.PS. I would not use the 5 in liner.Ray M

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