E. Separate Vertical Venting System - See Figures 6, 7, 8A, 8B and 9.
NOTICE
Roof penetrations require the use of roof flashing and storm collar - not supplied with boiler.
Vertical Venting –
1.See Figure 43 on Page 72 for Blower Vent Connector Assembly. Do not exceed maximum vent lengths. Refer to Table 4.
2.Installation of a vertical vent drain tee 8116304U is required on all vertical vent applications. See Figures 6 and 7. Attach vertical vent drain tee directly to elbow or horizontal pipe from an elbow immediately after vent connector.
3.Slope horizontal runs minimum ¼ inch per foot. Slope towards vertical vent drain tee. Position weld seams in vent pipes, in all horizontal runs, at the top to avoid condensate from lying on the seams.
4.Install fire stops where vent passes through floors, ceilings or framed walls. The fire stop must close the opening between the vent pipe and the structure.
5.Whenever possible, install vent straight through the roof. Refer to Figure 7 if offset is necessary. Maintain minimum clearance to combustible materials.
6.Install Vent Terminal.
a.Size roof opening to maintain minimum clearance from combustible materials.
b.Extend vent pipe to maintain minimum vertical and horizontal distance of twelve (12) inches from roof surface. Allow additional vertical distance for expected snow accumulation. Provide brace as required. Refer to Figures 8A and 8B.
NOTICE
Vertical venting requires the use of roof flashing and a storm collar to prevent moisture from entering the structure.
c.Install storm collar on vent pipe immediately above flashing. Apply Dow Corning Silastic 732
RTV Sealant between vent pipe and storm collar to provide weathertight seal.
d.Attach vent terminal.
Vertical Air Intake Piping –
7.Do not exceed maximum air intake length. Refer to Table 4.
8.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.
9.Use single wall metal pipe or PVC and fittings available at most heating distributors.
a.Air intake pipe diameter is based on boiler size.
10.Air intake termination must be located:
Vertical - At least twelve (12) inches above the roof surface plus the expected snow accumulation.
11.Start at collar on burner enclosure (inside boiler jacket) and work towards the air intake terminal.
12.Maintain minimum of ¼ inch per foot slope on horizontal runs. Slope down towards boiler.
13.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.
14.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 manufacturers’ instructions for installation procedures. Flashing manufacturers are Air- Jet, American Metal Products, Metal Fab, and Simpson
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 accumulation. Provide brace as required. Refer to Figures 8A and 8B.
c.Vertical air intake requires flashing and a storm collar to prevent moisture from entering the structure.
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