Inlet Air Pipe Penetration - Burnham Revolution Installation, Operating And Service Instructions

7. Locate air intake termination on the same roof
location as the vent termination if possible, to
prevent nuisance boiler shutdowns. However, boiler
may be installed with vertical venting and sidewall
combustion air inlet or visa versa, if installation
conditions do not allow alternate arrangement.
8. Use single wall metal pipe and fittings available at
most heating distributors, unless using PVC air
intake kit (P/N 6116054). See Section III. K. This
kit will allow S & D (thin wall) PVC to be used for
air intake piping.
a. Air intake pipe diameter is based on boiler size.
RV3 - RV4 – uses 3 inch diameter piping*
RV5 - RV7 – uses 4 inch diameter piping
* The PVC air intake kit (P/N 6116054), if used, will
increase air intake pipe diameter to 4 inch.
9. Air intake termination must be located:
Vertical - At least twelve (12) inches above the roof
surface plus the expected snow accumulation.
10. Start at collar on burner enclosure (inside boiler
jacket) and work towards the air intake terminal.
11. Maintain minimum of ¼ inch per foot slope on
horizontal runs. Slope down towards boiler.
12. The air intake pipe must be adequately supported
with straps or supports no less than five (5) feet
apart on horizontal runs. The complete air intake
piping system must be rigid and able to withstand
minor impacts without collapse.
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13. Inlet air pipe penetration:

Vertical - Size roof opening to allow easy insertion
of inlet piping and allow proper installation of
flashing and storm collar.
a. Use appropriately designed vent flashing when
passing through roofs. Follow flashing manufac-
turers' instructions for installation procedures.
Flashing manufacturers are Air-Jet, American
Metal Products, Metal Fab, and Simpson Dura-
Vent.
b. Extend air intake pipe to maintain minimum
vertical and horizontal distance of twelve (12)
inches from roof surface. Allow additional
vertical distance for expected snow accumula-
tion. Provide brace as required. Refer to Figure
8.
c. Vertical air intake requires flashing and a storm
collar to prevent moisture from entering the
structure.
d. Install storm collar on air intake pipe immedi-
ately above flashing. Apply Dow Corning
Silastic 732 RTV Sealant between air intake pipe
and storm collar to provide weathertight seal.
e. All exposed air intake piping must be construct-
ed of corrosion resistant material such as
aluminum, stainless steel or PVC.
14. Seal all joints airtight, using silicone caulk or self-
adhesive aluminum tape.
15. Install Air Intake Terminal:
Vertical - Insert intake piping into intake terminal
collar. Secure terminal to intake piping and seal
joint with silicone caulk.