Baxi LUNA HT 380 Notice D'installation Et D'entretien page 22

4.1.3 approved venting materials
We recommend that the Condensing HT boiler be vented with the manufacturer's venting material. This can be with either
coaxial venting or with the two pipe rigid vent system.
To vent the Condensing HT boiler with ABS/PVC vent pipe there are a few things that have to be taken into consideration.
Use only materials listed below for vent pipe, intake air pipe and fittings. Failure to comply could result in personal injury,
death or property damage and could void the boiler warranty. Installations must comply with local code requirements and
with U.S.ANSI Z223.1
WARNING
All venting must be properly supported. The HT series of boilers are not intended to support any type of
vent system whatsoever. All piping, glue, solvents, cleaners, fittings and components must conform to
ASTM and ANSI standards.
All vent pipe and combustion air pipe and fittings must comply with the following:
ABS schedule 40
PVC schedule 40
CPVC schedule 40
Materials used in the U.S. must comply with the following relevant standards: ANSI/ASTM D1785, ANSI/ASTMD2661,
ANSI/ASTMF441.
Note:
In Canada, ULC S636 approved schedule 40 CPVC is the only approved vent system approved to be used as an alter-
native to Baxi venting for the exhaust pipe.
Two Pipe Vent Support
All venting must be fixed every 3.28 ft (1.0 m) using steel strapping or equivalent.
Fig. 15
A: Steel strapping or equivalent
Note:
Ensure that the vent is sloped towards the boiler of approximately 0.39 in for every 3.28 ft (1.0 cm) for every 1.0 m
For horizontal flues a minor deviation from the horizontal is allowable, provided it results in a downward slope towards
the boiler.
Additional flue components are available as follows:
3.28 ft / 1.0 m flue
90° bend
45° bend
Vertical flue terminal assembly. Refer to the separate installation instructions supplied with the assembly.
WARNING
If an extra 90° bend is used, this reduces the maximum flue length by 3.28 ft / 1.0 m.
Each 45° bend used reduces the maximum flue length by 1.64 ft / 0.5 m.
INSTALLATION AND SERVICING INSTRUCTIONS
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