Flue Installation (R98LSi, R98LSi-ASME)
Air Intake Assembly
The air intake system consists of a field supplied 4 inch diameter stainless steel, Schedule 40 PVC, ABS or CPVC pipe. A maximum 6 feet of
The air intake has a zero clearance to combustibles.
Air Intake Connection
1.Drill 2 small holes at the end of the air intake pipe.
2.Slide the pipe over the air intake terminal.
3.Using a level, ensure the pipe is straight up and down.
4.With self tapping screws, attach the pipe to the air intake terminal.
5.Apply a bead of silicone around the pipe and air intake terminal, ensuring an air tight connection.
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Exhaust Pipe Assembly
Refer to the manufacturerís installation instructions for the specific exhaust vent system.
Venting Clearances to Combustibles
Vent | Enclosed | Unenclosed | ||
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Size | Horizontal | Vertical | Horizontal | Vertical |
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4"(101.6mm) | 4"(101.6mm) | 4"(101.6mm) | 1"(25.4mm) | 1"(25.4mm) |
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Horizontal Terminations
The air intake must be located in relation to the exhaust as shown below. The air intake must angle 1/4 inch per foot to the termination to prevent entry of rain.
6”
Vent
8”
Optional
Intake
Intake
EXHAUST
COMBUSTION AIR / INTAKE 
SLOPE INTAKE AND EXHAUST
TOWARD OUTSIDE TERMINATION
MINIMUM 1/4" PER FOOT
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32 | VA Series Indoor LS Manual |
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