Installing The Flue Pipe; Connecting Flue Pipe; Installing A Vent Damper - Buderus Logano G234X-64 Installation And Service Instructions Manual

5
Boiler installation
Procedure for checking the flue gas system:
Carry out these steps with every heating system that remains connected
to the flue gas system when the boiler is disconnected from a flue
header. Operate the heating system that is to be disconnected from the
flue header, while the other heating systems connected to the flue gas
system remain off.
A Seal all unused openings of the common flue gas system.
B Perform a visual inspection of the flue gas system to ensure that
it has the correct dimensions and longitudinal inclination. Make
sure that the system is not blocked, leaking, corroded or has
any other faults that cause it to operate improperly.
C If necessary, close all doors and windows of the building. Also
close all doors leading to other rooms of the building at the
location where the heating systems still connected to the flue
gas system are located. Switch off dryers and all appliances that
are not connected to the flue gas system. Operate all venting
fans and bathroom exhaust fans at their highest speed. Fans in
use in summer must remain in operation and oven exhaust
system flaps must be closed.
D Start up the heating system to be tested. Follow the instructions
for commissioning. Set the thermostat for continuous
operation.
E After the main gas burner has been operating for five minutes,
check the opening at the flue gas collector for drafts with an
open flame, or with the smoke of a cigarette, cigar or pipe.
F Perform this check on all heating systems that remain
connected to the flue gas system to ensure that the flue gases
are vented properly. Then place all doors, windows, venting
fans, exhaust system flaps, and all other gas-fired appliances
back into their original state.
G Any incorrect condition of the common flue gas system must be
corrected to ensure that the heating system complies with the
regulations of the National Fuel Gas Code, ANSI Z 223.1. If the
size of any component of the common flue gas system is
changed, the complete flue gas system must be resized to
comply with the relevant tables in Part 11 of the National Fuel
Gas Code, ANSI Z 223.1.
In Canada the regulations in accordance with CAN/CSA B 149.1 and 2
Installation Codes apply.
16
5.7.3

Installing the flue pipe

DANGER: Risk of fatal injury from escaping flue gases!
A flue gas collector that does not work properly can allow
dangerous flue gases to escape.
▶ Do not change the flue gas collector.
▶ Attach vent pipe to flue outlet of draft hood.
▶ Fasten the vent pipe with four (4) corrosion-resistant sheet metal
screws.
5.7.4

Connecting flue pipe

Use only vent pipes with the proper diameter for the boiler.
Every horizontal section of the flue gas routing pipe run must have a
minimum rise of ¼ inches/ft (21 mm/m) towards the chimney. The flue
pipe must be securely fastened to prevent it from sagging. A suspension
must be installed at least every 5 feet (1.5 m). Fasten every connection
with at least three (3) corrosion-resistance sheet metal screws. The end
section of the flue gas routing pipe must connect to the inside of the
chimney smoke duct.
A minimum clearance of 6 inches (155 mm) is required between the
vent pipes and all flammable materials.
The flue pipe must not be reduced in size and venting must not be
prevented by the installation of additional components.
▶ Connect vent pipe to the chimney with the shortest possible length of
vent pipe.
5.7.5

Installing a vent damper

▶ Use only the vent damper supplied with the boiler for the flue outlet
on the boiler.
In Canada the vent damper must not be installed on a
propane-fired heating system with a electronic ignition
system.
The position of the vent damper position blade must be visible.
The flue gas collector must be at least 6 inches (155 mm) from all
flammable components.
The vent damper must be readily accessible for preventive
maintenance.
The vent damper must be open when the main burner of the boiler is
operating.
▶ Place flue connector adapter [3] on the collar of the draft hood [4].
▶ Install pins in the holes provided in the vent damper [1].
▶ Fasten vent damper to the flue connector adapter with three (3)
corrosion-resistant sheet metal screws.
Logano G234X – 6 720 811 233 (2017/02)