The FW Series boiler is a 3-pass cast-iron boiler designed for use with light oil, gas, or a light oil-gas combination. The FW Series is designed for installation with either a standard chimney or a pressurized vent system. The boiler has a swing-open front door for easy service and inspection, and the stainless steel baffles are easily removed via the front door.

The FW comes in six sizes, with heating capacities ranging from 355,000 to 1,091,000 BTU/hr. The burner is ordered separately, please consult the factory for more details.

ype: Commercial
Heat Exchanger: Lead-Iron Alloy
Fuel: Oil, Gas (Natural or LP)
Input: Oil: 3.0 – 9.0 GPH
Gas: 433 – 1299 MBH
Combustion Efficiency: Oil: 84.7% – 85.0%
Gas: 82.2% – 82.5%
Venting: Chimney or Forced Draft
Ignition: N/A
Trim: Water
Domestic Water: N/A
Burner: Oil – Beckett
Gas – Power Flame
Configuration: Semi-Packaged
Notes: 3-Pass Scotch Marine design
Burner is ordered separately, consult factor for details
BOILER
MODEL		 I=B=R
BURNER INPUT		 I=B=R
GROSS OUTPUT		 I=B=R
NET RATING
WATER MBH		 COMBUSTION EFFICIENCY THERMAL EFFICIENCY APPROX
DRY WEIGHT
(LBS.)		 WATER
CONTENT
(GAL.)		 DRAFT
LOSS
(IN. W.C.)
OIL GPH GAS MBH MBH BHP OIL GAS OIL GAS
FW-4 3.0 433 355 10.6 309 85.0 82.5 84.5 81.7 948 15.8 0.16
FW-5 4.0 577 478 14.2 416 85.0 82.5 85.3 82.7 1124 19 0.27
FW-6 5.0 722 600 17.9 522 84.9 82.4 85.8 83.2 1301 22.2 0.39
FW-7 6.0 866 723 21.6 629 84.9 82.4 86.1 83.5 1477 25.4 0.51
FW-8 7.5 1082 907 27.1 789 84.8 82.3 84.6 83.5 1654 28.5 0.62
FW-9 9.0 1299 1091 32.6 949 84.7 82.2 86.6 84.0 1831 31.7 0.75