Instruction manual

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Horizontal vent systems shall terminate at least 4  ,
1.2 m below, 4  , 1.2 m horizontally from or 1  , 0.23 m
above any door, window or gravity air inlet into any building. It
must not terminate less than 4  , 1.2 m horizontally from, and in
no case above or below, unless a 4  , 1.2 m horizontal distance is
maintained, from electric meters, gas meters, regulators and relief
equipment and not less than 7  , 2.1 m from any adjacent public
walkway.  e bo om of the vent terminal(s) shall be located at
least 5  , 1.5 m above the air intake terminal(s) unless there is a
minimum 5  , 1.5 m horizontal separation between them. Avoid
terminal locations likely to be a ected by winds, snowdri s, people
and pets. Protect building materials and vegetation from degradation
caused by the  ue gases.
Vertical Direct Vent Systems - Figure 6
 e maximum length for the vertical vent and combustion air pipes
is 35  , 10.7 m plus two 90° elbows. If any part of a single wall
metal vent system passes through an unheated space it must be
insulated with insulation rated for 400°F, 204°C. Structural
penetrations must be made using approved  re-stops.
A listed, nonrestrictive vent cap must be used.  e top of a vertical
vent system must extend at least 5 1/2  , 1.7 m above the roof
surface that it passes through, 4  , 1.2 m above the intake air cap,
see Figure 6.
HORIZONTAL VENT, NEGATIVE PRESSURE,
CATEGORY I
In this con guration a wall-mounted power venter must be used
to pull the  ue products horizontally from the unit and vent them
to the outdoors, see Figures 3, 4 & 5.  e air for combustion is
taken from the space in which the unit is installed, or from the
outdoors.  e applicable instructions under the “COMBUSTION
AIR & VENTILATION” section must be followed!
To maximize the performance of single wall sheet metal vent systems
locate 90° elbows as far from the boiler as possible and from one
another. For best results, horizontal vent systems should be as short
and straight as possible.
When horizontal vent runs exceed 5  , 1.5 m they must be supported
at 3  , 0.9 m intervals with overhead hangers.  e vent system must
be pitched down, toward the vent terminal, 1/4 in/ , 20 mm/m.
If any part of a single wall metal vent system passes through an
unheated space it must be insulated with insulation rated for 400°F,
204°C.
Horizontal vent systems shall terminate at least 4  , 1.2 m below,
4  , 1.2 m horizontally from or 1  , 0.23 m above any door,
window or gravity air inlet into any building. It must not terminate
less than 4  , 1.2 m horizontally from, and in no case above
or below, unless a 4  , 1.2 m horizontal distance is maintained,
from electric meters, gas meters, regulators and relief equipment
and not less than 7  , 2.3 m from any adjacent public walkway.
 e bo om of the vent terminal(s) shall be located at least 5  ,
1.5 m above the air intake terminal(s) unless there is a minimum
5  , 1.5 m horizontal separation between them. Avoid terminal
locations likely to be a ected by winds, snowdri s, people and pets.
Protect building materials and vegetation from degradation caused
by the  ue gases.
To determine the appropriate power venter for the boiler/water
heater, see Table 6. Follow the power venter manufacturer’s
installation instructions.
Table 6 Power Venter Sizes
LCD Power Venter
Max. Pipe Length
Model Model
ft mm
225-300 HS-1 30* 9.3
400 HS-2 100 31.0
600 HS-2 67** 20.8
750 HS-3 100 31.0
1050-1200 HS-4 100 31.0
1480-2300 HS-5 100 31.0
*Choose HS-2 for 100 ft, Max. Pipe Length
**Choose HS-3 for 100 ft, 31 m, Max. Pipe Length
OUTDOOR VENTING
When installed outdoors the LCD must be   ed with the factory
supplied outdoor vent hood and air intake hood, see Figure 8.
Multiple units must be spaced per Figure 9.
 e boiler/water heater must be at least 10  , 3.1 m from any
door, window or gravity air inlet into any building and at least
3  , 0.9 m from any overhang unless local codes dictate di erently.
Avoid locations where wind de ection o of adjacent walls, buildings
or shrubbery might cause a downdra .  e unit(s) should be located
at least 3  , 0.9 m from structures. Outdoor installations are not
recommended in areas where the danger of snow blockage exists.
Do not place the boiler/water heater in a location that
would subject it to runo from adjacent buildings or
damage may occur voiding the warranty!