Installation Of The Exhaust And Air Intake System - Bosch ZBR16-3A Series Installation And Service Instructions Manual
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38 | Installation
In case of open venting:
▶ Use basket on the air intake.
In case of concentric venting system:
As an alternative to twin pipe venting, a purposely
designed and built telescopic concentric vent kit can be
obtained as an accessory from Bosch Thermotechnology
for a horizontal direct vent wall termination. This vent
system can be used for vent lengths of 2 feet to 3 feet
(610 mm to 915 mm).
For more details on connecting the flue system, refer to
the installation instructions for the flue kit.
Fig. 28 Horizontal venting system (telescopic concentric vent kit)
[1]
Intake
[2]
Exhaust
L
2 feet to 3 feet (610 mm to 915 mm)
▶ Install the concentric vent adaptor with the screws enclosed.
1
4
Fig. 29 Installing the concentric vent adaptor
[1]
Concentric vent adaptor
[2]
Screws
[3]
Combustion air test port
[4]
Flue gas test port
6.8.1 Installation of the exhaust and air intake system
NOTICE:
▶ Vent connectors serving appliances vented by natural
draft shall not be connected to any portion of
mechanical draft systems operating under positive
pressure.
6 720 806 992 (2015/03)
1
L
2
6 720 806 992-02.1O
2
3
6 720 806 992-01.1O
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 6.8.3).
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 avoid moisture and frost build-up and to maintain
clearances to openings on adjacent homes, 45 ° and
90 ° elbows or tees may be attached to the end of the
vent termination pipe to direct exhaust plumes away
from the adjacent structure. The total allowable vent
length, maximum number of elbows and distance to
air intake restrictions must be adhered to.
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