Multiple Boilers - Riello Condexa PRO NA 75P Installation, Operation And Service Manual

INSTALLATION
Vertical venting system (sealed combustion)
Vertical venting system (sealed combustion)
2 1
Flexible vent and
combustion air pipe
2 1

2.13.6 Multiple boilers

When installing multiple air and vent terminations, be sure that:
− The clearance between the vent and air termination are in
accordance with the figures shown in this chapter
− All vent pipes and air inlets must terminate at the same
height
Concentric vent and combustion air vertical termination; X ≥
12" (305 mm); Y ≥ 12" (305 mm) (18" (457 mm) for Canada and/
or per CAN/CSA B149.1) above highest snow level. Maximum
24" above roof
Concentric vent and combustion air horizontal termination; X
≥ 4" (102 mm); Y ≥ 24" (610 mm); Note: the terminations must
all be level with eachother and at a 12" (305 mm) min from
grade or the snow line.
X
34
X
Combustion
air intake
Vent