Laars NeoTherm NTH Installation And Operation Instructions Manual - page 13
NeoTherm Boiler
Page 13
A condensate drain trap is built into NeoTherm.
Connect a 3/4" PVC pipe between the drain
connection and a floor drain (or condensate pump if a
floor drain is not accessible).
The condensate drain must be installed so as to
prevent accumulation of condensate. When a
condensate pump is not used, the tubing must
continuously slope downward toward the drain with no
spiraling.
Consult local codes for disposal method.
Caution
Condensate is mildly acidic (pH
.
..
.
.
5), and may harm
some floor drains and/or pipes, particularly those that
are metal. Ensure that the drain, drainpipe, and
anything that will come in contact with the
condensate can withstand the acidity, or neutralize
the condensate before disposal.
Damage caused by
failure to install a neutralizer kit or to adequately
treat condensate will not be the manufacturer’s
responsibility.
2.3 Locating Vent & Combustion Air
Terminals
2.3.1 Side Wall Vent Terminal
The appropriate Laars side wall vent terminal must
be used, and is listed in this installation and operation
manual. The terminal must be located in accordance
with ANSI Z223.1/NFPA 54 and applicable local codes.
In Canada, the installation must be in accordance with
CSA B149.1 or .2 and local applicable codes. Consider
the following when installing the terminal:
1.
Figure 11
shows the requirements for mechanical
vent terminal clearances for the U.S. and Canada.
2.
Vent terminals for condensing appliances or
appliances with condensing vents are
not
permitted to terminate above a public walkway, or
over an area where condensate or vapor could
create a nuisance or hazard.
3.
Locate the vent terminal so that vent gases cannot
be drawn into air conditioning system inlets.
4.
Locate the vent terminal so that vent gases cannot
enter the building through doors, windows, gravity
inlets or other openings. Whenever possible, avoid
locations under windows or near doors.
5.
Locate the vent terminal so that it cannot be
blocked by snow. The installer may determine
that a vent terminal must be higher than the
minimum shown in codes, depending upon local
conditions.
6.
Locate the terminal so the vent exhaust does not
settle on building surfaces or other nearby objects.
Vent products may damage surfaces or objects.
7.
If the boiler or water heater uses ducted
combustion air from an intake terminal located on
the same wall (see
Figure 12
for proper spacing
and orientation).
2.3.2 Side Wall Combustion Air Terminal
The LAARS side wall combustion air terminal, or
concentric terminal (
see Table 3
), must be used when
the heater takes air from a side wall. Contact Laars for
AL24-4C termination fittings. Consider the following
when installing the terminal:
1.
Do not locate the air inlet terminal near a source of
corrosive chemical fumes (e.g., cleaning fluid,
chlorine compounds, etc.)
2.
Locate the terminal so that it will not be subject to
damage by accident or vandalism. It must be at
least 7 feet (2.1m) above a public walkway.
3.
Locate the combustion air terminal so that it
cannot be blocked by snow. The National Fuel Gas
Code requires that it be at least 12 inches (30cm)
above grade, but the installer may determine it
should be higher, depending upon local conditions.
4.
If the NeoTherm is side-wall vented to the same
wall, locate the vent terminal at least 1 foot (0.3m)
above the combustion air terminal.
5.
For concentric vent, follow instructions
included with vent kit.
6.
Multiple vent kits should be installed where the
horizontal distance between outlet group and inlet
group is 18" minimum.
7.
Vent outlet should be 12" above and/or 12"
horizontal to inlet pipe, but outlet should never be
mounted below the inlet center-line at any
horizontal distance.
2.3.3 Vertical Vent Terminal
When the unit is vented through the roof, the vent
must extend at least 3 feet (0.9m) above the point at
which it penetrates the roof. It must extend at least 2
feet (0.6m) higher than any portion of a building within
a horizontal distance of 10 feet (3.0m), and high enough
above the roof line to prevent blockage from snow.
When the combustion air is taken from the roof, the
combustion air must terminate at least 12" (30cm)
below the vent terminal (
see Figure 10
).
2.3.4 Vertical Combustion Air Terminal
When combustion air is taken from the roof, a
field-supplied rain cap or an elbow arrangement must be
used to prevent entry of rain water (
see Figure 11
). The
Figure 12. Minimum Venting Distance.