Weil-McLain CGi Series 3 Installation And Maintenance Manual page 10

CG i
GAS- FIRED wATER BOILER- sERIEs a -
B oiler Manual
1
e
Prepare boiler location - air openings
I&
WARNING
I
*
Combustion air opening location and sizing
requirements depend on the clearances around
the boiler. Check the boiler placement compared to
Figure I a, page 7.
If all clearances are at least equal to Figure 1a,
page 7, apply the sizing and placement of opening$
given on pages lO and I
I.
If ANY clearance Is Jess than Figure 1 a, page 7,
you must provide air openings sized and located as
shown in Figure lb,pa!>e
7.
DO NOT applythe siz.ing
and location informatiOn shown on page I 0 or I I.
Figure 2
*
Figure 3
Air openings must be provided
*
Combustion air and ventilation openings must comply the National Fuel
Gas
Code ANSI Z223.
I
- latest edition, or applicable local building codes.
Canadian installations must comply with Bl49. 1 or Bl49.2 Installation
Codes.
I&
WARNING!
Provide adequate combustion and ventilation air to
assure proper combustion and reduce the risk of severe
personal injury, death or substantial property damage
caused by flue gas spillage and carbon monox ide
emissions.
Air opening options
TWo openings - Air supply
from
Inside
the building
*
t. If the building is of unusually tight construcUon (see definition, next
page), the building must also be prcwlded with air openings dlrecUy
to the outside, sized and located per Figure 3, Figure 4 or Figure
5.
2. Buildings of typical construction should provide adequate combustion
air from natural infiltration, so additional air openings to the building
are not required.
3. See Figure 2. Provide two openings through the interior wall, within
12 inches of the ceiling and the floor, sized per Figure 2.
TWo openings - Air supply directly from outside
*
Figure 4
*
I. Air openings must
be
directly through an outside wall, or into a space Figure 5
that connects directly to the outside (such as a ventilated attic or crawl
space, for exam ple).
2. See Figure 3- Openings directly through an outside wall - _provide
*
two openings within 12 inches of the ceiling and the floor, SIZed per
Figure 3.
3. See Figure 4 -Air supplied through vertical ducts - provide two
openings terminated within 12 inches of the ceiling and the floor, sized
per Figure 4.
4. See Figure 5 - Air supplied through horizontal ducts - provide
two openings within 12 inches of the floor and the ceiling, sized per
Figure 5.
tO
Air openings to Interior spaces
Each opcnii)Q ff'Oo urea •
1 sq.
inr.h
per 1,000 lltuh
Air directly through outside wall
EIIClh opaning lro• an:n
=
1 :r;q. 1nch per 4,000 Btuh
Air from outdoors - vertical duels
Out$1de or ven1Ha1 ed aulc
E.::lch opening Into
III'Oll
a
1 sq. inch per 4.000 Btuh
•
-
...
.. ..
~·
V cm!llol<ld
Ull1TJ1lll
Cl'swt space
tJUJU:/JJJ
Air from
outdoors - horizontal
ducts
Eect. opening f;ee area '"'
1 sq.
lneh pet 2.000
Btuh
''"
,
....
Part Number
550-142-780/0712