Viessmann VB2 Series User Manual

Connections
20
Venting Connection (Gas and Oil Installations)
When installing piping or venting, or
while insulating overhead pipes, do not
standontoppanelofboiler.Advise
other trades accordingly!
Vitola boiler
Outside rain cap
For gas use B vent.
For oil use approved oil vent
i.e. A-Vent, L-vent or better
Barometric damper
(MGI for gas, M for oil)
Vent pipe adaptor
Single wall galvanized steel v ent
(24-26 ga.)
Installation
1. Installtheventingsoastoachieve
the shortest possible way with
minimum elbows. If necessary,
rearrange existing water piping to
achieve closest chimney connection.
2. Horizontal runs must be supported by
appropriate means to prevent
sagging. Avoid long horizontal runs of
vent pipe. Horizontal runs should
have not less than ¼” rise per ft.
from the boiler to the vent terminal.
Metal strapping must be used to
support horizontal runs every 4 ft.
3. Fasten sheet metal vent pipe adaptor
supplied with boiler to the
cast-iron flue collar
. Use high
temperature silicone to seal between
sheet metal adaptor and boiler
cast-iron vent connection. Drill pilot
holes with 11/64” cobalt HSS drill bit
and fasten using three equally s paced
screws. Reinforce with locking band.
Vent pipe adaptors are s hipped in
Connection Fitting Package.
4. Connect vent pipe adaptor with
chimney via a field s upplied, slightly
inclined intermediate section of
venting. Flue pipe diameter:.
VB2-18 to -22 Outside ∅ 5”
..............
VB2-33 to -40 Outside ∅ 6”..............
VB2-50 to -63 Outside ∅ 7”..............
5. Drill a ½” opening onthesideof
the vent pipe approximately three
times the v ent pipe diameter away
from the flue gas collar of the boiler
for flue gas analys is equipment.
6. Seal all flue pipe joints.
7. Ensure any non-insulated vent pipe is
insulated to reduce cooling of flue
gas.
5167 404 v1.9
IMPORTANT
Failure to securely fasten all vent
connections, including vent pipe
adaptor to boiler, can cause flue
gases to enter living s pace. F lue
gases leaking into living space can
cause carbon monoxide poisoning.
WARNING
D
2-3 x D

Viessmann VB2 Series Specifications

General

Brand	Viessmann
Model	VB2 Series
Category	Boiler
Language	English