Terminating The Flue; Fixing The Flue - Navien LCB700-21RS Installation & Operation Manual

6.4 Terminating the Flue

Before installing the boiler, determine what type of flue
termination is appropriate for the installation location and
situation. The subsections that follow describe some typical flue
configurations.
CAUTION
Minimum Clearance to Metering devices and Relief
equipment. Maintain a minimum horizontal clearance of
1.22 m from electric meters, gas meters, regulators, and
relief equipment. Do not install the boiler above or below
electric meters, gas meters, regulators, or relief equipment
unless a 1.22 m horizontal clearance is maintained.

6.5 Fixing the Flue

After installing the flue vent, fasten the screw to fix the flue vent
to the flue duct. (Use screws supplied by Navien.)
Flue connections must be firmly pressed together so that
the gaskets from an airtight seal. To ensure optimum joint
connection, it is recommended to secure with three self tapping
screws. Secure the flue to the wall or ceiling with pipe clamps or
perforated hanger iron.
WARNING
The screw must be fastened completely to fix the flue vent
to the flue duct. If it is not properly fastened, it can result
in excessive levels of carbon monoxide, which can lead to
severe personal injury. Flue vent installation should be
performed only by a licensed professional.
Flue System 37