Section 2 Locating The Unit; A Locating The Unit; B Correct Vent Distance From Outside Wall Or Roof - Bradford White LAARS NEOTHERM LC NTH1000 Installation And Operation Instructions Manual

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SECTION 2 Locating the unit

2.A Locating the unit

This unit may be installed indoors or outdoors.
If installing in a location that may experience
freezing temperatures, precautions must be
taken to prevent water in the heat exchanger
and condensate inside and outside of the boiler
from freezing. Damage due to freezing water or
condensate is not covered by the warranty.
This unit should be located to provide clearances
on all sides for maintenance and inspection. It
should not be located in an area where leakage
of any connections will result in damage to the
area adjacent to the unit or to lower floors of the
structure. When such a location is not available,
it is recommended that a suitable drain pan,
adequately drained, be installed under the unit.
Always install the unit on a firm, level surface.
The unit is design-certified by CSA-International for
installation on combustible flooring; in basements;
in closets, utility rooms or alcoves. These boilers
and water heaters must never be installed on
carpeting. The location should be chosen with regard
to the vent pipe lengths and external plumbing.
The unit shall be installed such that the gas ignition
system components are protected from water
(dripping, spraying, rain, etc.) during operation
and service (circulator replacement, control
replacement, etc.).
When vented vertically, this unit must be located as
close as practical to the vertical section of the vent.
If the vent terminal and/or combustion air terminal
terminate through a wall, and there is potential for
snow accumulation in the local area, both terminals
should be installed at an appropriate level above
grade or the maximum expected snow line.
The dimensions and requirements that are shown
in Table 1 should be met when choosing the
locations for the appliance.
2.B Correct Vent Distance from
Outside Wall or Roof Termination
The forced draft combustion air blower in the
appliance has sufficient power to vent properly
when the guidelines in Table 2 are followed.
LAARS Heating Systems
Note - When located on the same wall, the units
combustion air intake terminal must be installed a
minimum of 12" below the exhaust terminal. There
must also be a minimum horizontal distance from
intake to the exhaust terminal of 36."
For the concentric vent terminal kit (optional), follow
the installation instructions included with the kit.
SERVICE
APPLIANCE SUGGESTED
SURFACE INCHES
Front 24
Left Side 12
Right Side 18
Back 24
Top 24
APPLIANCE REQUIRED CLEARANCE TO
SURFACE INCHES
Front 2
Left Side 0
Right Side 0
Back 0
Top 8
Vent 1
Table 1. Clearances
Combustion Intake and Vent must be the same size.
Installations in the U.S. require exhaust vent pipe that is PVC or
CPVC complying with ANSI/ASTM D1785 F441, polypropylene
complying with ULC-S636, or stainless steel complying with
UL1738. Installations in Canada require exhaust vent pipe that
is certified to ULC S636.
Intake (air) pipe must be PVC or CPVC that complies with ANSI/
ASTM D1785 F441, ABS that complies with ANSI/ASTM D1527,
stainless steel, or galvanized material.
Closet and alcove installations do not allow the use of PVC
under any circumstances
To calculate max equivalent length, measure the linear feet of
the pipe, and add 5 feet (1.5 m) for each elbow used.
STANDARD
VENT
6"
Unit
Table 2. Vent / Air Pipe Sizes
ACCESS CLEARANCE
CM
60.9
30.5
45.7
60.9
60.9
COMBUSTIBLES
CM
5.1
0
0
0
20.3
2.6
MAX EQUIV.
FT. M
100 30