Viessmann VR2 Series - Page 17

Connections
17
Venting Connection (Continued)
When installing piping or venting, or
while insulating overhead pipes, do not
stand on top panel of boiler. Advise
other trades accordingly!
Vitorond boiler
Outside rain cap
Vent, use approved single wall
galvanized steel vent, 24/26 ga.
i.e. A-Vent, L-Vent or better
M-Barometric damper
(field supplied) for oil
Flue gas collar
For Canada:
Blocked vent safety switch
*1
Install in accordance with the draft
control manufacturer’s instructions.
Installation Instructions
Blocked Vent Safety Switch
Installation
Use approved vent material only.
Type-A or Type L-vent should be used
for the entire vent.
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. Connect flue gas collar
directly to
chimney via a field s upplied, slightly
inclined intermediate section of
venting. Flue pipe outside ∅:6”.
4. Fasten using eit her three equally
spaced, corrosion resistant,
self-tapping screws and high
temperature silicone, or equivalent
means.
5. Drill a ½” opening “G” on the side of
the vent pipe approximately three
times the vent pipe diameter away
from the flue gas collar of t he boiler
for flue gas analysis equipment.
6. Seal all f lue pipe joints.
7. Ensure any non-insulated vent pipe is
insulated to reduce cooling of flue
gas.
5285 838 v2.1
IMPORTANT
D
2-3 x D
G