Buderus Logamax plus - Page 25

Installation 6
Logamax plus GB162-80 kW/100 kW - Subject to modifications resulting from technical improvements! 25
Vent must be at least 12 inches (305 mm) above grade,
anticipated snow line or roof surface (Canada 18” (457 mm)
minimum) (see fig. 21).
Vent termination must be at least 7 ft (2,135 mm) above
a public walkway (see fig. 22).
Vent must be 3 ft (915 mm) above any forced air intake
within 10 ft (3,050 mm) (see fig. 22).
Do not extend exposed vent pipe outside the building
beyond recommended distance. Condensate could freeze
and block vent pipe.
Vent should terminate at least 3 ft (915 mm) away from adja-
cent walls, inside corners and 5 ft (1525 mm) below roof
overhang (see fig. 22).
It is not recommended to terminate vent above any door or
window, condensate can freeze causing ice formations.
Do not use chimney as a raceway if another boiler or fire-
place is vented into or through chimney.
All non-steel vent pipes must be glued, except for the flue
gas adapter. Installed you can slide the pipe onto the
adapter, properly supported and the exhaust pipe must be
pitched a minimum of a ¼ inch (6.35 mm) per foot back to
the boiler. This allows the condensate to drain away.
All non-steel combustion air and vent pipe materials and
fittings must comply with the following and must be UL
approved venting material:
* Components of the certified vent systems must not be interchanged with other vent systems or unlisted pipe fittings Plastic components, and specified
primers and glues of the certified vent system must be from a single system manufacturer and not intermixed with other system manufacturer's vent
system parts.
Approved flue material are from:
Fig. 21 Vent and air pipe position (1) of a sealed combustion
system
12" (305 mm)
minimum
12" (305 mm)
minimum
12" (305 mm)
minimum
INTAKE
EXHAUST
12" (305 mm)
minimum
12" (305 mm)
minimum
Item Material United states Canada
4” (100 mm) Vent or air
pipe and fitting
PVC schedule 40, 80 ANSI/ASTM D1785
BH Gas venting
systems,
ULC S636 *
PVC-DWV ANSI/ASTM D2665
CPVC schedule 40, 80 ANSI/ASTM F441
Pipe
cement/ primer
PVC ANSI/ASTM D2564
CPVC ANSI/ASTM F493
Roof terminals Flue System (trade name) Supplier
4”/6" (100/150 mm) concentric PVC IPEX
4” (100 mm) parallel stainless steel Flex-L
Wall terminals Flue System (trade name) Supplier
4” (100 mm) parallel stainless steel Flex-L
90°-elbow with inlet screen PVC/stainless steel Z-Flex/Heat Fab
NOTICE
- DO NOT use cellular core pipe.
- DO NOT use PVC when using anti-freeze in the primary circuit of the boiler. Use CPVC or stainless steel only!