Laars NTH, Installation And Operation Instructions Manual

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Page 15
N
EO
T
HERM
Boilers and Water Heaters
of all equipment in the enclosure. When communicating to
the outdoors through horizontal ducts, each opening shall
have a minimum free area of not less than 1 square inch per
2000 Btu/hr (1100 square mm/kW) of total input rating of all
equipment in the enclosure.
Method 2 : One permanent opening, commencing within
12” (300mm) of the top of the enclosure, shall be permitted.
The opening shall directly communicate with the outdoors
or shall communicate through a vertical or horizontal duct
to the outdoors or spaces that directly communicate with the
outdoors and shall have a minimum free area of 1 square inch
per 3000 Btu/hr (734 square mm/kW) of the total input rating
of all equipment located in the enclosure. This opening must
not be less than the sum of the areas of all vent connectors in
the confined space.
Combustion Air From Room
In the United States, the most common requirements specify
that the space shall communicate with the outdoors in
accordance with method 1 or 2, which follow. Where ducts
are used, they shall be of the same cross-sectional area as the
free area of the openings to which they connect.
Method 1 : Two permanent openings, one commencing within
12” (300mm) of the top and one commencing within 12”
(300mm) of the bottom, of the enclosure shall be provided.
The openings shall communicate directly, or by ducts, with
the outdoors or spaces that freely communicate with the
outdoors. When directly communicating with the outdoors, or
when communicating to the outdoors through vertical ducts,
each opening shall have a minimum free area of 1 square inch
per 4000 Btu/hr (550 square mm/kW) of total input rating
INSTALLATION STANDARDS
MATERIAL UNITED STATES CANADA
ABS ANSI/ASTM D1527
PVC, sch 40 ANSI/ASTM D1785 or D2665 Air pipe material must be chosen
CPVC, sch 40 ANSI/ASTM F441
based upon the intended application of the boiler.
Single wall galv. steel 26 gauge
PRO TECH (FasNSeal) HEAT FAB (Saf-T-Vent) Z FLEX (Z-Vent)
SIZE Boiler Flue Intake Air Boiler Intermediate Flue Intake Air Boiler Flue Intake Air
Adapter Termination Termination Adapter Adapter Termination Termination Adapter Termination Termination
399-600
F303759 FSBS4 FSAIH04 KB285600 9454BUREZ-1* 9492 9414TERM 2SVSLA04 2SVSTP04 2SVSTEX0490
FSRC4(R.C) 303888 5400CI 2SVSRCX04
750-850
F303759 FSBS6 FSAIH04
303888
Figure 13. Approved Stainless Terminations and Adapters
HORIZONTAL INTAKE AND EXHAUST PVC VENT TERMINAL KITS
Size
2” PVC 3” PVC 4” PVC 6” PVC
S
tan
da
rd
C
on
cen
tri
c
C
A
00
60
00
Fl
us
h
M
ou
nt
C
A
01
01
00
S
tan
da
rd
C
A
00
59
00
C
on
cen
tri
c
23
9-
44
06
9-
01
Fl
us
h
M
ou
nt
C
A
01
01
01
S
tan
da
rd
Fl
us
h
M
ou
nt
C
A
01
01
02
S
tan
da
rd
80 incl. opt. opt. opt. opt. opt.
105 incl. opt. opt. opt. opt. opt.
150 incl. opt. opt.
199/210 incl. opt. opt.
285 opt. opt. opt. incl. opt. n/a
399 n/a n/a n/a incl. opt. n/a
500 n/a n/a n/a incl. opt. n/a
600 n/a n/a n/a incl. opt. opt.
750 n/a n/a n/a incl. n/a opt.
850 n/a n/a n/a incl. n/a opt.
Concentric vent terminal = 10 ft. pipe length
incl.
incl.
opt.
opt.
opt.
opt.
HORIZONTAL INTAKE AND EXHAUST PVC VENT TERMINAL KITS
Size
2” PVC 3” PVC 4” PVC 6” PVC
S
tan
da
rd
C
on
cen
tri
c
C
A
00
60
00
Fl
us
h
M
ou
nt
C
A
01
01
00
S
tan
da
rd
C
A
00
59
00
C
on
cen
tri
c
23
9-
44
06
9-
01
Fl
us
h
M
ou
nt
C
A
01
01
01
S
tan
da
rd
Fl
us
h
M
ou
nt
C
A
01
01
02
S
tan
da
rd
80 incl. opt. opt. opt. opt. opt.
105 incl. opt. opt. opt. opt. opt.
150 incl. opt. opt.
199/210 incl. opt. opt.
285 opt. opt. opt. incl. opt. n/a
399 n/a n/a n/a incl. opt. n/a
500 n/a n/a n/a incl. opt. n/a
600 n/a n/a n/a incl. opt. opt.
750 n/a n/a n/a incl. n/a opt.
850 n/a n/a n/a incl. n/a opt.
Concentric vent terminal = 10 ft. pipe length
incl.
incl.
opt.
opt.
opt.
opt.
Table 7. PVC Vent Terminal Kits
Figure 14. Required Combustion Air Pipe Material