Page 27
4.
For concentric vent, follow instructions
included with vent kit.
5. Multiple vent kits should be installed such that the
horizontal distance between the outlet group and
the inlet group is 36” (90cm). (Figure 19.)
6. The vent outlet for models 199-285 must be no
lower than the center of the air inlet, and must be
at least 12” (30cm) away from the air inlet. Vent
outlets for models 399-850 must be at least 12”
above the top of the air inlet, and must be at least
36” (90cm) horizontally from the air inlet. (page
27.)
Vertical Vent Terminal
When the unit is vented through the roof, the vent must
extend at least 3 feet (0.9m) above the point at which
it penetrates the roof. It must extend at least 2 feet
(0.6m) higher than any portion of a building within a
horizontal distance of 10 feet (3.0m), and high enough
above the roof line to prevent blockage from snow.
The vent terminal included with the unit can be used
in both vertical and horizontal applications. When the
combustion air is taken from the roof, the combustion
air must terminate at least 12” (30cm) below the vent
terminal. (See Figure 17.)
Vertical Combustion Air Terminal
When combustion air is taken from the roof, a field-
supplied rain cap or an elbow arrangement must be
used to prevent entry of rain water. (Figure 17.) The
opening on the end of the terminal must be at least
12” (30cm) above the point at which it penetrates the
roof, and high enough above the roof line to prevent
blockage from snow. When the vent terminates on the
roof, the combustion air must terminate at least 12”
(30cm) below the vent terminal.
Installations in the Commonwealth of Massachusetts
In Massachusetts the following items are required if the
side-wall exhaust vent termination is less than seven
(7) feet above finished grade in the area of the venting,
including but not limited to decks and porches. From
Massachusetts Rules and regulations 248 CMR 5.08
(begininning on 2nd page following):
1.
Installation of Carbon Monoxide Detectors
At the time of installation of the side wall vented
gas fueled appliance, the installing plumber or
gas-fitter shall observe that a hard-wired carbon
monoxide detector with an alarm battery back-up is
installed on the floor level where the gas appliance
is to be installed. In addition, the installing plumber
or gasfitter shall observe that a battery operated
or hard-wired carbon monoxide detector with an
alarm is installed on each additional level of the
dwelling, building or structure served by the side-wall
horizontally vented gas fueled equipment. It shall
be the responsibility of the property owner to secure
the services of qualified licensed professionals for
installation of hard-wired carbon monoxide detectors.
a. In the event that the side-wall horizontally vented
150-285
Figure 19. Minimum Venting Distance
NOTE:
For US installations, the vent for this appliance shall
not terminate:
i) over public walkways; or
ii) near soffit vents or crawl space vents or other areas
where condensate or vapor could create a nuisance
or hazard or cause property damage; or
iii) where condensate vapor could cause damage or
could be detrimental to the operation of regulators,
relief valves, or other equipment.
N
EO
T
HERM
Commercial Boilers and Water Heaters
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...
