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Vitorond 100, VR1 22 to 33, 91 to 140 Installation and Service
Venting Connection
Legend
A Vitorond boiler with burner
B Outside rain cap
C Vent, use approved vent material
D M-Barometric damper (field supplied) for oil *1
E Vent pipe adaptor (factory supplied)
F For Canada: Blocked vent safety switch
Installation Instructions
Blocked Vent Safety Switch
*1 Install in accordance with the draft control
manufacturer's instructions.
(continued)
When installing piping or venting, or while insulating
overhead pipes, do not stand on top panel of boiler.
Advise other trades accordingly!
Installation
Use approved vent material only.
1. Install the venting so as to achieve 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. (1.2 m)
3. Connect factory supplied vent pipe adaptor E
to flue gas collar. Fasten using either three equally
spaced,corrosion resistant, self-tapping screws and
high temperature silicone, or equivalent means.
4. Connect chimney via a 18" (457 mm) long field
supplied, slightly inclined intermediate section of
venting. Flue pipe outside ∅: 5".
5. Drill a ½" opening on the side of the vent pipe
approximately three times the vent pipe diameter
away from the flue gas collar of the boiler for flue
gas analysis equipment.
6. Seal all flue pipe joints.
7. Viessmann recommends that any non-insulated vent
pipe is insulated to reduce cooling of flue gas and
velocity noises.
For direct vent application, refer to the Direct
Vent System Installation Instructions
Connections
15
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