Laars Neotherm NTH, Инструкция по установке и эксплуатации

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Page 25
INSTALLATION STANDARDS
MATERIAL UNITED STATES CANADA
Stainless Steel UL 1738 Venting must be ULC-S636 certified for use as
PVC, sch 40 ANSI/ASTM D1785 venting material. The venting material class must be
CPVC, sch 40 ANSI/ASTM F441 chosen based upon the maximum flue gas temperature
Polypropylene ULC-S636 and the intended application of the boiler.
Figure 16. Required Exhaust Vent Material
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In Canada, refer to CAN/CSA B149.1
Figure 17. Combustion Air and Vent Through Roof
Venting Requirements Unique to Canada
These 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 Installation Kit (
Figure
10 and Figure 11)
are not included
with these 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 unit to use ULC S636 certified
vent material consistent with the requirements as
described in the Venting and Combustion Air section.
Class I venting systems are suitable for gas-fired
appliances producing flue gas temperature of more than
135°C, but not more than 245°C.
Class II venting systems are suitable for gas-fired
appliances producing flue gas temperatures of 135°C or
less.
Class II venting systems are further classified 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 flue gas sampling port is installed in
the vent system. This flue gas sampling port must be
installed near the flue connection of the unit: within 2
feet of the flue connection. There is no flue gas sampling
port internal to the unit, so one must be installed in the
vent system external to the 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, the manufacturer 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.
(See Figure 18)
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 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, the manufacturer suggests the use of a coupler
fitting from the certified vent system into which the vent
terminal screen, included with the unit 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 unit’s
instructions.
N
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HERM
Commercial Boilers and Water Heaters