Laars LMH, Инструкция по установке и эксплуатации, Страница: 11 / 52

Mascot II Boilers and Water Heaters Page 9
INSTALLATION STANDARDS
MATERIAL UNITED STATES CANADA
Stainless Steel UL 1738 Venting must be ULC-S636 certified for use as
PVC, sch 40 ANSI/ASTM D178 venting material. The venting material must be chosen
CPVC, sch 40 ANSI/ASTM F441 based upon the intended application of the boiler.
Table 5. Required Exhaust Vent Material.
shall also be supplied for ventilation, including air
required for comfort and proper working conditions for
personnel.
3.2 Venting (Exhaust)
WARNING
Failure to use the appropriate vent material, installation
techniques, glues/sealants could lead to vent failure
causing property damage, personal injury or death.
WARNING
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.
The flue temperature of the Mascot II 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 Mascot II is installed in
an application where the ambient temperature is
elevated, and/or installed in a closet/alcove, CPVC
or stainless steel material is required. If the system
temperatures are unknown at the time of installation,
stainless or CPVC material is recommended.
The Mascot II is a Category IV appliance and may
be installed with PVC and CPVC that complies with
ANSI/ASTM D1785 F441, or a stainless steel venting
system that complies with UL 1738 Standard
(see Table 5 ).
INSTALLATIONS IN CANADA require the use
of venting material certified to ULCS636. All Gas
vents connected to the Mascot II, plastic, stainless
steel or otherwise must be certified to this ULC
standard. Appropriate selection of vent material is
very important for proper performance and safe
operation of the Mascot II.
The flue temperature of the Mascot II 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 Mascot II is installed in
an application where the outlet water temperature
exceeds 145°F, and/or installed in a closet, class IIB
or higher vent material is required. If the system
temperatures are unknown at the time of installation,
class IIB or higher venting material is recommended.
IN CANADA all venting used must meet the
following requirements:
1. ULC-S636 certified and marked
2. The first 3 feet of venting must be accessible for
visual inspection.
3. All components used in the vent system must be
from a certified manufacturer.
4 . Vent system components must not be mixed
with alternate manufacturers certified
components and/or unlisted components.
5 . The venting must be installed according to the
vent manufacturers installation instructions.
The unit’s vent can terminate through the roof, or
through an outside wall.
See Table 2 to select the appropriate vent pipe
diameter. Vent pipe must pitch upward, toward the vent
terminal, not less than 1/4" per foot, so that condensate
will run back to the Mascot II to drain. Route vent
pipe to the heater as directly as possible. Seal all
joints and provide adequate hangers as required in the
venting system manufacturer’s Installation Instructions.
Horizontal portions of the venting system must be
supported to prevent sagging and may not have any low
sections that could trap condensate. The unit must not
support the weight of the vent pipe. Please see Table 2
for proper diameter vs. length allowed.
Figure 7. Combustion Air and Vent Through Roof.