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,1752'8&7,21
352'8&767$1'$5'5$7,1*6
Ratings for Model FCX are provided in the following
table:
Ratings are for the boiler when connected to stan-
dard option coaxial flue system components.
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Rated Output BTUH 76,000
Rated Input BTUH 81,250
Combustion Chamber Length Inches 8.98
Combustion Chamber Diameter Inches 11.5
Combustion Chamber Volume Cu. Inches 915
Combustion Prod. Circuit Volume Cu. Inches 3051
Flue Pressure Drop Inches H2O 0.10
Maximum Heating Service Pressure Psig 43.5
Max Heating circuit water temperature Deg. F 176
Water Overheating Safety Thermostat Setting Deg. F 230
Combustion Prod. Overheating Safety Thermostat Setting Deg. F 248
Heating Circuit Water Capacity Gallons 4.23
Primary Water Flow Rate (60/80 deg. C) Gal/hr 254
Water Pressure Drop (at nominal flow rate) MCE 1.4
Power Absorbed (with burner, without circulator) KW 0.22
Packaged Weight Lb. 267
Electrical Power Supply
115 volts, single phase, 60 Hz
Full Load Current
3.0 Amps FLA
Max Fuse/ Circuit Breaker Size
15 Amps
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Combustion Products 3.15 / 4.92 Inch
Water Heating Supply/Return 1 Inch
Domestic Hot Water or Second Heating Circuit 1 Inch
Condensate Drain 1 -1/2 Inch
Heating Water Drain ½ Inch
Air Bleed 3/8 Inch
Safety pressure relief valve 3/4 inch