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NOTICE:
Burner damage!
▶ Avoid drawing in combustion air excessively loaded with dust or
airborne particles.
DANGER:
▶ Ensure that the flue pipes and seals are not damaged.
▶ Use only sealing compounds (primer and glue) approved with the
vent material.
▶ Never install a barometric nor a thermally controlled vent damper
with this boiler.
▶ Connect only one boiler to each flue system or chimney flue.
▶ Do not route the flue system piping through or inside another duct
that is used for exhausting air or other flue gases.
▶ The condensate trap must be primed at all times. Failure to do so may
allow combustion gases to escape into boiler room.
▶ External insulation on plastic vent pipe is prohibited.
Consult local and state codes pertaining to special building code and fire
department requirements. Adhere to national code requirements.
Observe the listed maximum lengths of vent system, which are boiler
model dependent ( chapter 6.7.3).
DANGER:
Improper venting of the Greenstar boiler can result in excessive
levels of carbon monoxide which can result in severe personal injury
or death.
▶ The boiler must be vented in accordance with the Venting of
Equipment section of the latest edition of ANSI Z 223.1 / NFPA 54
Natural Fuel Gas Code and/or the Venting systems and air supply for
appliances section of the latest version of CAN/CGA B149.1 Natural
Gas and Propane Installation Code in Canada and in accordance with
all applicable local building codes.
NOTICE:
▶ To prevent moisture and frost and ensure the minimum clearances to
openings and neighboring buildings, 45° and 90° elbows or T-pieces
may be attached to the flue outlet in order to direct flue gas away from
neighboring buildings. The total allowable vent length, maximum
number of elbows and distance to air intake restrictions must be
adhered to.
Optional vent systems are:
• Direct vent installations (sealed combustion)
Greenstar combi 100 p / 151 p
Notes on installation and operation | 25
For direct vent applications all applicable items below must be met.
1
X
Fig. 23 Vent and combustion air pipe position of a sealed combustion
system
[1]
Intake
[2]
Exhaust
X
At least 1 foot (305 mm)
Vent termination must be at least 4 feet (1 220 mm) below, 4 feet
(1 220 mm) horizontally away from or 1 foot (305 mm) above every
door, every window or every air opening in any building ( Fig. 24 [2],
[X
], [X
], page 27).
1
3
If multiple boilers are installed in a row, allow at least 1 foot (305 mm)
clearance between the vent termination of one and the combustion air
intake of the other.
The combustion air inlet is located at least 1 ft (305 mm) above the
upper edge, the expected snow line or roof surface (in Canada, at least 1
1/2 ft (457 mm) ( Fig. 24 [Y
], page 27).
A
Vent termination must be located at least 7 ft (2135 mm) above public
traffic routes ( Fig. 24 [X
], page 27). Condensate can exit at the
5
terminal end. Ensure that condensate spilling from the termination does
not create a hazard or a nuisance.
Do not allow expose vent pipes outside the building to extend past the
recommended distance. Condensate can freeze and block the flue
outlet.
Vent termination must be at least 3 ft (915 mm) away from adjoining
walls, inside corners and 5 ft (525 mm) below the roof overhang
( Fig. 24 [X
], [X
], page 27).
2
4
Do not extend exposed vent pipe outside the building beyond
recommended distance. Condensate could freeze and block vent pipe.
Did not use the chimney as a conduit if the flue gases from a wall-
mounted gas condensing boiler or other combustion equipment are
routed in or through the chimney.
All non-steel PVC/CPVC vent pipes must be glued, except for the flue gas
adapter.
The flue pipe must be supported properly and angled downward at least
¼ inch (6.35 mm) per foot from the wall-mounted gas condensing boiler.
This allows the condensate to drain away.
2
X
6 720 641 933-19.1O
6720872361 (2017/04)
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