LAARS NeoTherm NTV1000 - Install and Operating Manual - Manual (Page 16)

LAARS Heating Systems
Page 12
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 Figures 9 and 10 for
proper spacing and orientation.
If the vent termination is located in an area exposed
to high winds, an optional PVC tee (the same
diameter as the vent pipe) may be used. The tee’d
vent termination offers greater protection from wind
related operating issues.
3.3.2 Side Wall Combustion air terminal
The LAARS side wall combustion air terminal
must be used when the heater takes air from a side
wall. (See Table 3.) Contact Laars for AL29-4C
termination fittings. Consider the following when
installing the terminal. (See Figures 9 and 10).
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 ( 2.1 m) above a public walkway.
fig. 10 - minimum Venting Distance
IMPORTANT: All terminals must be placed so that they remain at least
12” above the expected snow line. Local codes may have more specific
requirements, and must be consulted. Refer to the NFPA54 National Fuel
Gas Code and your local codes for all required clearances for venting.
fig. 9 - multiple Side-Wall terminals, air and Vent