IBC SL 14-115 G3, Installation And Operating Instructions Manual

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1-9
INSTALLATION
SL 14-115 G3, SL 20-160 G3, SL 30-199 G3 MODULATING GAS BOILERS SL 14-115 G3, SL 20-160 G3, SL 30-199 G3 MODULATING GAS BOILERS
b) For Rooftop Direct Vent systems:
• Rooftop, two pipe, direct vent configurations, including typical clearance requirements,
are shown in Figure 6.
• The intake air pipe is not typically drained, so it must be terminated with a down-turned
elbow (see Figure 6).
• The intake pipe does not need to penetrate the roof at the same elevation as the
exhaust (as shown); lower down on the roof is acceptable.
• For roof top venting of multiple boiler sets, group all intake terminals together for a
common penetration through a custom cap. Alternatively, place in the closest proximity
achievable using commonly available pipe flashing. Similarly group the exhaust pipes
and place the two separate groups of pipes at least 3’ apart (the closest intake and
exhaust pipes shall be 36”, or more, apart). Use the same 12” (minimum) vertical
separation for 2 pipe option. For alternate group terminations, contact the IBC Factory
for written guidance.
• Roof Top Concentric Termination kits are approved for use with the boiler model. The
installation of the vertical roof top concentric termination must follow the installation
instructions supplied with the venting material manufacturer. Care must be taken to
install the termination kit a minimum horizontal distance of 10’ (305cm) away from
any portion of the building and a minimum of 2’ (61cm) above the roof line plus the
anticipated snow line.
1.4.6 Sidewall Vent Termination
a) Vent terminal clearance minimums are as follows:
• The exhaust vent terminal is to be placed 18” minimum (12” in USA) above the grade
or anticipated snow level.
• Clearance above grade, veranda, porch, deck or balcony – 12” (0.3m), but check local
code also (anticipated snow levels may supersede).
• Clearance to openable window or door – 36” (0.91m) (USA – 12”).
•
Vertical clearance to ventilated soffit located above the terminal - 48” (1.2m). See the
Caution note in this section.
• Clearance to each side of centre line extended above meter/regulator assembly: - 3’
(0.91m) within a height of 15’ (4.6m) above the meter/regulator.
• Clearance to service regulator vent outlet: - 3’ (0.91m).
• Clearance to non-mechanical air supply inlet to building or the combustion air intake to
any other appliance: - 3’ (0.91m) (USA – 12” (0.3m)).
WARNING
Condensate can cause corrosion
of metal roofing components
and other roofing materials.
Check with the builder or
roofing contractor to ensure
that materials will be resistant to
acidic condensate. pH levels can
be as low as 3.0
Figure 6: Rooftop vent terminal configurations
Figure 7: Rooftop vent
termination with sidewall
combustion air