Viessmann Vitodens 200-W WB2B Series Installation Instructions Manual page 4

Table of Contents
Direct Venting
(Two-pipe System)
4
Vitodens Rigid and Flex Venting Systems Installation
General Installation Information...................................29
Installation steps (outline).......................................29
Exhaust and combustion air piping material...............29
Approved materials for two-pipe system.................30
Exhaust Vent/Air Intake Requirements.........................31
Combustion air supply............................................31
General requirements..............................................32
Vent Requirements - Stainless Steel...........................33
Additional requirements for stainless steel
vent pipe material..................................................33
Component Parts of the Venting System - Stainless
Steel........................................................................37
Vent Requirements - CPVC........................................38
Additional requirements for UL/ULC-listed
CPVC vent pipe material.........................................38
Exhaust Vent/Air Intake Connection To Boiler............38
Requirements for UL/ULC Listed Rigid PP(s)
Vent Pipe Material.....................................................39
Vent system manufacturers.....................................39
Vent and Air Intake Pipe Starter Adaptors - PP(s)..........40
Side Wall Vent Termination - Stainless Steel,
CPVC or PP(s)..........................................................42
Vent Length Requirements.........................................43
Maximum vent/air intake pipe length - horizontal........43
Maximum vent/air intake pipe length -
horizontal/vertical (hybrid system)............................46
Standard Long Sweep Elbows.....................................47
Equivalent vent length calculation example................48
Component Parts of the PP(s) Venting System.............50
Vertical pipe system...............................................50
Horizontal pipe system............................................52
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