Instructions / Assembly

Page 3
For Furnace Models GBI, GCI, GHI, GSI, and GUI
BTU/Hr. Diameter of
Flue Collar
on Furnace
Installer
Provided Flue
Pipe Transition
Size Diameters
Maximum
Equivalent Length
(ft.) for 4" Vent Pipe
Maximum
Equivalent Length
(ft.) for 5" Vent Pipe
45,000 3" 3" to 4" 100 100
70,000 3" 3" to 4" 100 100
90,000 3" 3" to 4" 100 100
115,000 4" None 85 95
140,000 4" None 65 80
For Furnace Models GMI
BTU/Hr. Diameter of
Flue Collar
on Furnace
Installer
Provided Flue
Pipe Transition
Size Diameters
Maximum
Equivalent Length
(ft.) for 4" Vent Pipe
Maximum
Equivalent Length
(ft.) for 5" Vent Pipe
40,000 3" 3" to 4" 100 100
60,000 4" None 100 100
80,000 4" None 100 100
100,000 4" None 100 100
120,000 4" None 80 90
140,000 4" None 60 80
General Wiring
For complete installation information refer to the Field Controls SWG-4AM Power Venter Installation
Manual for details (P/N 46333300.)