LAARS Heating Systems
Page 12
IMPORTANT NOTE ABOUT COMMON VENTING:
A
single vent that is shared by multiple Mascot II units
MUST be engineered by a competent venting
specialist, and involves the selection of draft inducing
equipment, hardware and controls to properly balance
flue gas pressures.
Do not common vent Mascot II
units unless the vent system meets this
requirement. Mascot II units are never permitted to
share a vent with Category I appliances.
A condensate drain trap is built into Mascot II.
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.
3.3 Locating Vent & Combustion Air
Terminals
3.3.1 Side Wall Vent Terminal
The appropriate Laars side wall vent terminal must
be used. 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 9
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 9
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, or
concentric terminal (
see Table 3
), must be used when
the heater takes air from a side wall. Consider the
following when installing the terminal (
see Figure 9
):
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.
For concentric vent, follow instructions
included with vent kit.
5.
Multiple vent kits should be installed such that the
horizontal distance between outlet group and inlet
group is 36" (90cm) minimum.
6.
Vent outlet must be no lower than the center of the
air inlet, and must be at least 12" (30cm) away
from the air inlet (see
Figure 8
).
Figure 8. Minimum Venting Distance.
Summary of Contents for Mascot II
Page 6: ...LAARS Heating Systems Page 6 Figure 2 Location of Components...
Page 27: ...Mascot II Boilers and Water Heaters Page 27 Figure 22 Wiring Diagram...
Page 42: ...LAARS Heating Systems Page 42 Figure 28 Panel Assembly Door Top...
Page 43: ...Mascot II Boilers and Water Heaters Page 43 Figure 29 Panel Assembly Door Middle...
Page 44: ...LAARS Heating Systems Page 44 Figure 30 Panel Assembly Door Bottom...
Page 45: ...Mascot II Boilers and Water Heaters Page 45 Figure 31 Base Jacket Assembly...
Page 46: ...LAARS Heating Systems Page 46 Figure 32 Heat Exchanger Cabinet Fan...
Page 47: ...Mascot II Boilers and Water Heaters Page 47 Figure 33 Heat Exchanger Burner Components...
Page 48: ...LAARS Heating Systems Page 48 Figure 34 Pump Assembly Components...
Page 49: ...Mascot II Boilers and Water Heaters Page 49 Figure 35 Plumbing Components...
Page 50: ...LAARS Heating Systems Page 50...
