Camus Hydronics Dynaforce Series, Installation And Service Manual, Page: 14 / 82

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•
The termination point of the combustion air inlet cap must
be installed at least 3 feet (0.91M) above the rooftop and
above normal snow levels.
• The vent cap assembly MUST be listed by nationally
recognized agencies.
• Combustion air supplied from outdoors must be free of
contaminants. To prevent recirculation of flue products in to
the combustion air inlet, follow all instructions in this section.
•
Incorrect installation and/or location of the air inlet cap can
allow flue products to be drawn back into the appliance.
This can result in incomplete combustion and potentially
hazardous levels of carbon monoxide in the flue products.
This will cause operational problems with the appliance and
if left uncorrected, will lead to conditions that can cause
personal injury or death.
Figure 6: Vertical Direct Venting Configuration
2.1.7 AIR INLET DAMPER
In cold climates it is essential to provide a motorized air inlet
damper to control the supply of combustion air and prevent
nuisance condensation.
Figure 6: Air Inlet Damper Connection inside J-Box
2.1.8 MASONARY CHIMNEY INSULATIONS
Always follow local codes when venting this appliance into a
masonry chimney. A standard masonry chimney must NOT be
used to vent the products of combustion from the flue of a
condensing, positive or negative pressure appliance (Category
II or IV). If a masonry chimney is to be used, the chimney MUST
use a sealed, corrosion resistant liner system to vent flue
products from this high efficiency appliance. Sealed, metallic,
corrosion resistant liner systems (AL29-4C or equivalent, single
wall or double-wall, or flexible or rigid metallic liners) must be
rated for use with a high efficiency condensing, positive
pressure vent system. Corrosion resistant chimney liner
systems are typically made from a high grade of corrosion
resistant stainless steel such as AL29-4C or equivalent. The
corrosion resistant liner must be properly sized and fully sealed
throughout the entire length. If the flue is contained within the
masonry chimney both the top and the bottom of the masonry
chimney must be capped and sealed to provide a dead air space
around the sealed corrosion resistant liner.
Consult with local code officials to determine code
requirements or the advisability of using a masonry
chimney with a sealed corrosion resistant liner system.
2.1.9
VERTICAL VENTING TERMINATION
• Follow Category II or IV vent termination and all General
instructions.
• The vent terminal should be vertical and exhaust outside
the building at least 2 feet (0.61M) above the highest point
of the roof within a 10 foot (3.05M) radius of the termination.
•
The vertical termination must be a minimum of 3 feet
(0.91M) above the point of exit.
•
A vertical termination less than 10 feet (3.05M) from a
parapet wall must be a minimum of 2 feet (0.61M) higher
than the parapet wall.
2.1.10 COMBINED COMBUSTION AIR INLET
The air inlet pipes from multiple appliances can be combined to
a single common connection if the common air inlet pipe has a
cross sectional area equal to or larger than the total area of all
air inlet pipes connected to the common air inlet pipe.
Equivalent pipe diameter = Sq Root [(d
1
) 2 + (d
2
) 2 + (d
3
) 2 + (d
4
) 2
+……+ (d
n
) 2 ], d, pipe diameter

Example: What is equivalent pipe diameter of three air inlet
pipes, 8" (20.3 cm), 10” (25.4 cm) and 12” (30.5 cm)
Equivalent pipe diameter = Sq Root [(8) 2 + (10) 2 + (12) 2 ] = Sq
Root (308) = 17.5”, Select 18” (82.8 cm) diameter pipe or larger.
The air inlet point for multiple boiler air inlets must be provided
with an exterior opening which has a free area equal to or
greater than the total area of all air inlet pipes connected to the
common air inlet. This exterior opening for combustion air must
connect directly to the outdoors. The total length of the
combined air inlet pipe must not exceed a maximum of 100”
(30.5M) equivalent feet. You must deduct the restriction in area
provided by any screens, grills or louvers installed in the
common air inlet point. Screens, grills or louvers installed in the
common air inlet can reduce the free area of the opening from
25% to 75% based on the materials used. Calculate and
compensate accordingly for the restriction.
2.1.11 DRAIN TEE
Figure 7: Drain “T” and Neutralizer Cartridge Installation
A drain line must be connected to the boiler condensate drain
and to a tee installed in the vent pipe to collect and dispose of
any condensate that may occur in the boiler and vent system.
The drain tee should be installed at the point where the flue turns
vertical for a roof top termination or as one of the first fittings in
a horizontal flue that will terminate on a SIDEWALL. Ensure that
horizontal portions of the vent are properly sloped away from the
Vent
Air Intake
Air inlet must be 36”
min. below vent
opening
YELLOW
BLACK
BLUE
RED
24VAC, COMMON
CALL FOR HEAT
TO IGNITION
24VAC, CONST.
POWER
Flue Outlet
Flue In
Drain Tee
4” Loop from Top
to Bottom
Drain Tubing
Condensate neutralization system
Condensate
Drain