Install Instructions

Page 9
NEOTHERM Residential Boilers
E. CPVC exhaust pipe section (80-210) (not incl.)
F. outdoor/system sensor kit
G. ow switch kit (399-850MBH, Commercial Only)
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 certied vent
material consistent with the requirements as described in the
Venting and Combustion Air section.
Class I venting systems are suitable for gas-red appliances
producing ue gas temperature of more than 135°C, but not
more than 245°C.
Class II venting systems are suitable for gas-red appliances
producing ue gas temperatures of 135°C or less.
Class II venting systems are further classied into four
temperature ratings as follows:
A Up to and including 65°C
B Up to and including 90°C
C Up to and including 110°C, and
D Up to and including 135°C
IMPORTANT! It is also the responsibility of the installer
to ensure that a ue gas sampling port is installed in the vent
system. This ue gas sampling port must be installed near the
ue connection of the NeoTherm unit: within 2 feet of the
ue connection. There is no ue gas sampling port internal
to the NeoTherm, so one must be installed in the vent system
external to the NeoTherm unit. A ue gas sampling port
available as a component of the ULC S636 certied vent
system is preferred. However, if one is not available with
the certied vent system, Laars suggests using a tee with the
branch connection sized to allow for insertion of a ue gas
analyzer probe. The branch connection must be resealable
with a cap or other by other means to ensure the vent system
remains sealed. (See Figure 5.)
Consideration must be given to the placement and orientation
of the ue gas sampling port to ensure that condensate is free
to ow back into the NeoTherm unit and not collect anywhere
in the vent system - including in the ue gas sampling port.
An exhaust vent terminal must be installed. If an exhaust vent
terminal is not available with the certied vent system, Laars
suggests the use of a coupler tting from the certied vent
system into which the vent terminal screen, included with the
NeoTherm and shown in the Unpacking section, 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.
3.4 LocatingVentandCombustionAir
Terminals
SideWallVentTerminal
The appropriate 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 points listed on the
following page when installing the terminal.
Figure 5. -TestPort-ULC-S636system
Figure 4. -CombustionAirandVentThroughRoof
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In Canada, refer to CAN/CSA B199.1