Installing A Common Vent System; About The Common Vent System - Navien NPE-180A2 Installation Manual

6. Installing a Common Vent System

6.1 About the Common Vent
System
The Navien Common Vent System* provides an easy
way to install the vent system for up to 12 Navien
NPE water heater units. By sharing the main intake
and exhaust vent pipes, effective system venting is
available with less venting materials and minimal
number of penetrations on the walls or roofing.
* Independently tested and approved by CSA
Read all safety messages and carefully follow the
guidelines in this manual when installing a common
vent system for the Navien NPE water heater units.
DANGER
This appliance is certified as a "Category IV"
appliance and requires a special venting system.
The vent system operates with a positive
pressure in the pipe.
To prevent serious injury or death:
ALWAYS vent exhaust gases directly outdoors
●
using the vent materials and following these
instructions.
DO NOT connect vent connectors serving
●
appliances vented by natural draft into
any portion of mechanical draft systems
operating under positive pressure.
WARNING
Improper venting of the water heater can result
in excessive levels of carbon monoxide and can
lead to serious injury or death.
This water heater must be vented in accordance
with the "Venting of Equipment" section of
the latest edition of the ANSI Z223.1/NFPA
54 Natural Fuel Gas Code in the USA and/or
the "Venting systems and air supply for water
heaters" section of the latest version of the
CAN/CGA B149.1 Natural Gas and Propane
Installation Code in Canada, as well as all
applicable local building codes and regulations.
To prevent serious injury or death:
ONLY licensed professionals should install
●
venting.
ALWAYS follow all regulations, codes, and
●
instructions when venting the water heater.
ALWAYS seal the venting system gastight
●
to prevent flue gas leakage and carbon
monoxide emissions.
The building owner is responsible to maintain
●
the exhaust and intake terminations free of
snow, ice, or other potential blockages, as
well as scheduling routine maintenance.
Installing a Common Vent System 73