Page 24
NOTE: The flue temperature of the unit changes
dramatically with changes in operating water
temperature. Therefore, it is necessary to assess
the application of the boiler to determine the
required certified vent class. If the unit is installed
in an application where the ambient temperature
is elevated, and/or installed in a closet/alcove,
polypropylene, CPVC or stainless steel material is
required. If the system temperatures are unknown
at the time of installation, Class IIB or higher venting
material is recommended.
WARNING
Failure to use polypropylene CPVC or stainless steel
venting for the first 20” (285-600) / 30” (199 / 210)
of vent material or for any part of the venting that is
installed inside a closet may lead to property damage,
personal injury or death. The proper length of this
material is supplied with boiler. Boilers in the U.S. may
use pipe included with the boiler.
Failure to use the appropriate vent material,
installation techniques, glues/sealants could lead to
vent failure causing property damage, personal injury
or death.
Use of cellular core PVC (ASTM F891), cellular core
CPVC, or Radel® (polyphenolsulfone) used in non-
metallic venting systems is prohibited.
Non-metallic vent pipe (PVC, CPVC, polypropylene
or other) shall NOT be insulated or covered.
Insulating or covering non-metallic venting may cause
overheating which diminishes the integrity of the pipe.
All venting must be installed according to this manual
and any other applicable local codes, including but
not limited to, ANSI Z223.1/NFPA 54, CSA B149.1,
CSAB149.2 and ULC-S636. Failure to follow this
manual and applicable codes may lead to property
damage, severe injury, or death.
WARNING
This product uses non-metallic insulation
WARNING
When an existing Cat I appliance is removed or
replaced, the original venting system may no longer
be sized to properly vent the attached appliances.
Under no circumstances should an improperly sized
vent be used. An improperly sized vent may cause
operational and safety problems, and could result in
serious injury, death, or property damage.
3.C Venting
This unit is a Category IV appliance and may be
installed with PVC and CPVC that complies with ANSI/
ASTM D1785 F441, polypropylene that complies with
ULC-S636 Class IIb, or a stainless steel venting system
that complies with UL 1738 Standard. (See Table 6)
The unit’s vent can terminate through the roof, or
through an outside wall.
When using PVC/CPVC for vent material, venting
must be connected to the CPVC section included with
sizes 80-850. The CPVC vent section included with
the unit may be broken by CPVC fittings if necessary,
but never reduced in total length. See Table 4 to
select the appropriate vent pipe diameter. When using
polypropylene, all vent material must be produced by
the same manufacturer, and have a ULC-S636 rating.
All installations should be done following the vent
supplier’s recommended installation techniques.
If manufacturer’s instructions are not available
for the material used, follow the manufacturers
recommendations.
Route vent pipe to the heater as directly as possible.
Please see Table 4 on page 21 for proper diameter vs.
length allowed.
REMARQUE : Acheminer le tube d’évent à l’appareil de
chauffage le plus directement possible. Veuillez voir le
tableau 4 à la page 13 pour le bon diamètre vs. longueur
autorisée. Le tuyau d’évacuation doit pitch vers le haut,
vers la borne d’évent, pas moins de 1/4 “ par pied, de
sorte que les condensats courir vers l’ et appareil écouler
thru le réservoir des condensats. Portions horizontales
du système d’aération doit être soutenu pour empêcher
l’affaissement et peut ne pas avoir de faibles sections qui
pourraient piéger des condensats
IMPORTANT NOTE ABOUT COMMON VENTING:
A
single vent that is shared by multiple 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 units unless the
vent system meets this requirement. These units
are never permitted to share a vent with Category I
appliances.
NOTE: The vent pipe must pitch upward, toward
the vent terminal, not less than 1/4” per foot, so
that condensate will run back to the unit and drain
out thru the condensate trap. Horizontal portions of
the venting system must be supported to prevent
sagging and may not have any low sections that
could trap condensate. Seal all joints and provide
adequate hangers as required in the venting system
manufacturer’s Installation Instructions. The unit must
not support the weight of the vent pipe.
LAARS Heating Systems
Summary of Contents for Neotherm NTH
Page 4: ...LAARS Heating Systems...
Page 36: ...Page 36 Figure 22 Hydronic Piping Single Boiler Zoning with Circulators LAARS Heating Systems...
Page 52: ...Page 52 Figure 36 Ladder Diagram 7 H Ladder Diagram LAARS Heating Systems...
Page 100: ...Page 100 Parts Illustration 4 Internal Components Sizes 750 850 LAARS Heating Systems...
Page 102: ...Page 102 Parts Illustration 6 Gas Train Components Sizes 600 850 LAARS Heating Systems...