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Connections
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.
18
Vitorond 100, VR1 40 to 63, 161 to 245 Installation and Service
(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 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 Ø: 6".
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.
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