John Wood Concentric Vent - JW98-DVC - Manuel (Page 13)

13
Suggested inspection openings
450mm x 450mm (18" x 18")
(Combustible material)
External wall,
combustible material
• Inspection openings are suggested for the vent intake and exhaust
pipes if they are installed in an enclosure. These openings should be
near the entrance and exit of the vent into the enclosure.
• These openings should be 450mm x 450mm (18" x 18").
When the vent pipe passes through an enclosed space:
Ceiling
Sloping down toward vent terminal
Vertical Vent Termination
• Terminate at least 1.8m (6') from the combustion
air intake of any appliance, and 0.9m (3') from
any other building opening, gas utility meter,
service regulator etc.
• Enclose exterior vent systems below the roof
line to limit condensation and protect against
mechanical failure.
• When the vent penetrates a floor or ceiling and
is not running in a fire rated shaft, a firestop
and support is required.
• When the vent termination is located not less
than 2.4m (8') from a vertical wall or similar ob-
struction, terminate above the roof at least 0.6m
(2'), but not more than 1.8m (6'), in accordance
with the National Fuel Gas Code ANSI Z223.1/
NFPA 54 and/or CSA-B149.1.
• Provide vertical support every 2.1m (').
• Slope the horizontal vent 1/4" for every 300mm
(12") towards the drain tee.
• The integrated condensate collector must be
used for vertical runs in excess of 0.9m (3').
Remove the cap prior to attaching the drain tubing.
• When 2 units are installed in a Quick Connect
Multi System, maintain a minimum distance of
1.5m (5') between the vertical terminations.
Firestop
Firestop/
Support
Roof Flashing
(Base and Adapter)
Air Intake
Pipe
Rain
Cap
5' or more
Hanger
Strap
Elbow
Slope vent
Upwards
* Condensate collector
must be used if the
vertical run exceeds
0.9m (3').
Drain condensate
according to
local codes.