Installation Of The Vent System - Rinnai E75CN Installation & Servicing Instructions Manual

6.7.3

Installation of the vent system

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Consult local and state codes pertaining to special building code and fi re
department requirements. Adhere to national code requirements.
Follow the listed maximum length of vent systems, which are boiler output
dependent. The maximum permissible lengths are listed in table 9, chapter 6.7.6.
Decide how to install the exhaust and air intake system. You can choose between:
- Concentric system (see chapter 6.7.2a)
The concentric connection is provided standard initially.
The boiler concentric connection diameter is 3"/5" (80/125 mm), to which the venting
and air supply system can be fi tted, with or without elbow pieces. The maximum
permissible pipe length is displayed in table 9, chapter 6.7.6.
- Parallel system (see chapter 6.7.2b)
The boiler can be converted to a parallel system with supplied adapters.
It is possible to use a parallel pipe connection of 2x 3". In this case a seperate supplied
kit, with 2 vent adapters 3" (ø80mm), cover 5" (ø125mm), vent exhaust pipe and
gaskets should be fi tted instead of the concentric vent adapter on top of the boiler.
See chapter 6.7.3.1 for installation. The maximum permissible pipe length is set out
in table 9, chapter 6.7.6.
- Room Air System (outdoor combustion air)
The boiler can use room air for combustion. If this option is selected the boiler must
fi rst be converted to the parallel system. A single exhaust pipe can then be fi tted.
It is required to use a room air fi lter (Part nr. 808000025) when using indoor air for
combustion. See chapter 6.7.3.2 for installation. The maximum permissible pipe
length is set out in table 9, chapter 6.7.6.
Rinnai strongly recommends the use of the room air fi lter when a Room Air
System (indoor combustion air) is used.
When the boiler is installed in any of the areas listed in chapter 5.1, "Areas
likely to have contaminants" or any area exposed to the contaminants listed in
chapter 5.1, then sealed combustion is required.
We advise to install a vent system out of the venting system program supplied by
Rinnai (See chapter 19 Parts list Vent system). For further information about the
available components of the venting and air supply system we recommend you
consult Rinnai and the Installation instructions and parts list documentation.
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