LAARS NeoTherm NTV600 - Install and Operating Manual - Manual (Page 16)

LAARS Heating Systems
Page 14
units unless the vent system meets this
requirement. NeoTherm units are never permitted
to share a vent with Category I appliances.
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 con-
densate 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.
3.2.1 Venting Requirements Unique to
Canada
NeoTherm boilers and water heaters are Vent
Category IV appliances. Per the requirements of CAN/
CSA-B149.1, only BH vent systems can be connected to
these units and such vent systems, either ULC S636
certified stainless steel or other ULC S636 certified BH
vent (eg. plastics) must be installed per the vent
manufacturer's certified installation instructions.
As a result, two items listed in the Unpacking
section ( Figure 8 ) are not included with NeoTherm
units for Canada (underlined):
A. exhaust vent terminal (not included)
B. air intake terminal
C. temperature/pressure gauge kit
D. circulator pump/wire harness (units with pump)
E. CPVC exhaust pipe section (80-500) (not incl.)
F. outdoor/system sensor kit
G. flow switch kit (399-850)
H. alternate size vent/terminal screens
J. exhaust vent adapter CPVC/ST ST (750-850)
It is the responsibility of the appropriately licensed
technician installing this NeoTherm unit to use ULC
S636 certified vent material consistent with the
requirements as described in the Venting and
Combustion Air section.
IMPORTANT! It is also the responsibility of the
installer to ensure that a flue gas sampling port is
installed in the vent system. This flue gas sampling port
must be installed near the flue connection of the
NeoTherm unit: within 2 feet of the flue connection.
There is no flue gas sampling port internal to the
NeoTherm, so one must be installed in the vent system
external to the NeoTherm unit. A flue gas sampling port
available as a component of the ULC S636 certified
vent system is preferred. However, if one is not
available with the certified vent system, Laars suggests
using a tee with the branch connection sized to allow for
insertion of a flue gas analyzer probe. The branch
connection must be resealable with a cap or other by
other means to ensure the vent system remains sealed
(Figure 11) .
Consideration must be given to the placement and
orientation of the flue gas sampling port to ensure that
condensate is free to flow back into the NeoTherm unit
and not collect anywhere in the vent system - including
in the flue gas sampling port.
An exhaust vent terminal must be installed. If an
exhaust vent terminal is not available with the certified
vent system, Laars suggests the use of a coupler fitting
from the certified vent system into which the vent
terminal screen, included with the NeoTherm and
shown in the Unpacking section of the NeoTherm
Installation & Operating Instructions, be installed. Be
sure to install and terminate both vent and combustion
air pipes per the Venting and Combustion Air section of
the NeoTherm instructions.
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:
Figure 11. Test Port.