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I am about to sign a contract for a Smith G8w3steam boiler with the Ez-Gas burner. While reviewing the details on the combo I found something odd.
That boiler is rated at 105,000 BTU. The Carlin Ez Gas burner spec sheet (1/09) has a table that tells one to drill the orifice to 0.228" for 100,000 BTU while the Smith G8 / EZ Gas sheet (no date) indicates you should use a 9/32 drill (0.281") to size the orifice.
0.228 does not equal 0.281", what am i missing?
I did the math on the EZ Gas orifice sizes on the Carlin web site and it seems that doubling the orifice size doubles the BTU's, which makes sense.
Also my steam system has about 200 sq ft of EDR attached and the Smith G8s3 is rated for 283 sq ft, can they drill a smaller size orifice to more closely match my needs without unduly impacting the efficiency?
I'm going to use a contractor to install this but I just want to understand why the differences in the tables exist.
Smith G8-3 with EZ Gas @ 90,000 BTU, Single pipe steam
Vaporstat with a 12oz cut-out and 4oz cut-in