Paloma PH2-20 Direct Vent - Manual (Page 14)

Installing the water heater:
Vertical Vent Installation
A fire stop plate should be installed at every
penetration of a floor or ceiling if the vent is
not running in a fire-rated shaft. Maintain the
required air space clearance to combustible
materials and building insulation.
Once the vent terminal location has been
determined, make a hole through the roof and
interior ceiling to accommodate the vent pipe.
Complete the vent pipe installation to the
water heater’s vent connector fitting on the
water heater vent collar outlet. Support
vertical or horizontal runs as previously
mentioned. If required, use silicone sealant
at the point the vent connector joins the
water heater.
Install adequate flashing where the vent
pipe passes through the roof. Determine the
vent terminal height and install the vent pipe
accordingly. Refer to the diagram above for
proper vent terminal height.
The vent roof system must terminate at least
1 foot (30 cm) above the roof line and at least
2 feet (61 cm) higher than any portion of the
building within 10 feet (3 m).
Install supports every 5 feet (1.5 m) vertically
along the vent pipe route. Vertical supports
are required after every transition to vertical
and are required after every offset elbow.
When the vent is free-standing and penetrates
a roof/ceiling, another means of support must
be used at a second location.
Follow the vent manufacturer’s recommended
installation instructions provided with the
vent purchased from the manufacturer.
Chase Requires
0" (0 cm) Clearance
to Combustibles
Firestop
Firestop/Support Plate
Adjustable
Roof
Flashing
Concentric
Vent Pipe has
0” Clearance
Requirment
Storm
Collar
Support
Clamp
1/4" per foot upward
slope on horizontal run
Vertical
Termination
Air Intake
3“/ 5” Concentric Pipe
Condensate
Drain Line
Form a Trap
in the drain
line.
To Drain: Dispose
of condensate in
accordance to
local codes
Support
Hanger
Vertical Vent Installation
with Horizontal offset
Straight Vertical
Vent Installation
12” (min)
(30 cm)
Standard Vertical Vent Termination
Vertical Vent Termination Location
The location of the vent terminal depends on the following
minimum clearances and considerations (see diagram at left):
Minimum twelve (12) inches (30 cm) above roof. 2
Minimum twelve (12) inches (30 cm) above anticipated
snow level.
Maximum twenty-four (24) inches (60 cm) above roof level
without additional support for vent.
Four (4) feet (1.2 m) from any gable, dormer or other
roof structure with building interior access (i.e., vent,
window, etc.).
Ten (10) feet (3 m) from any forced air inlet to the building.
Any fresh or make-up air inlet such as a dryer or furnace
area is considered to be a forced air inlet.
3
2 For installations in Canada 18" (45.7 cm).
3 For installations in Canada 6' (1.8 m) .
Notice: Only Paloma
approved termination
and parts should be used
during installation.
Notice: Follow vent
manufacturer’s installation
instructions and their
required clearances to
combustibles as required.
14
Min. 12" (30 cm) Above Roof 1
Min. 12" (30 cm) Above Anticipated Snow Level.
Max. 24" (60 cm) Above Roof (Without Additional Support)
1 Min. 18" (46 cm) Above Roof for installations in Canada.
Vent Pipe
Through Roof
Only Paloma approved
termination and parts
should be used during
installation.