The SG system is a European three-pass reverse flame path boiler design. This causes a more complete combustion of the fuel increasing AFUE efficiency up to 88% and reducing NOX emissions. The SG is constructed from GG20 cast-iron and is ASME rated to operate at 59 PSI. Due to this, it comes with a lifetime warrantee. The SG also complies with all international standards. Each SG is assembled with a front hinge door that allows easy access for maintenance.
Boiler Model #
Number of Sections
Heating Capacity
Gross Input Burner Capacity
Net Output (MBH)
AFUE Efficiency (%)
Water Content (Gals.)
Length (L) (Inches)
Weight (Lbs.)
     
G.P.H.
MBH
          
SG 2
2
79
0.65
91.0
69
86.1
6.9
16.7
264
SG 3
3
123
1.00
140.0
107
86.1
7.7
21.8
341
SG 4
4
160
1.30
182.0
139
86.5
9.6
26.9
418
SG 5
5
201
1.60
224.0
175
87.7
11.3
32.1
506
SG 6
6
232
1.90
266.0
202
86.1
13.1
37.2
605
SG 7
7
279
2.25
315.0
243
86.8
14.9
42.3
704

Maximum water working pressure: 50 PSI. (1) The burner input is based on oil with a heat value of 140,000 BTU/Gal.; (2) The net output ratings shown are based on piping and pick-up allowance of 1.15; (3) The efficiency ratings are based on a combustion condition of 12.5% CO2. Warranty: The BIASI SG boiler has a limited lifetime warranty. A copy is provided with each boiler or is available from your dealer. Built in accordance with the requirements of ASME boiler and pressure vessel code.

A 3-pass boiler design is the most efficient way to get the maximum amount of heat from the boiler. The design extracts heat from three times as much interior surface area of the boiler, compared to a single-pass, “pin-type” boiler design
Technical Advantages
  • Energy Star compliant, 87.7% AFUE
  • GG 20 corrosion resistant cast-iron
  • 58 psi cast-iron construction
  • Easy-access swing door
  • Reverse flame path for "low nox" emissions
  • Super efficient, 3-pass flame path/heat exchanger
  • Extra heavy insulation for low jacket & standby losses
  • ASME and IBR listed
  • Control panel burner switch, linear temperature and pressure gauge

©Quincy Hydronic Technology, 10/2002

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