Weil-McLain CGi 4 Series Manual page 10

CGi
SERIES 4 — GAS-FIRED WATER BOILER —
1e
Prepare boiler location — air openings
Combustion air opening location and sizing
requirements depend on the clearances around
the boiler.
Figure 1a, page 7.
✷
If all clearances are at least equal to Figure 1a,
, apply the sizing and placement of openings
page 7
given on pages 10 and 11.
If ANY clearance is less than Figure 1a, page 7
you must provide air openings sized and located as
shown in Figure 1b, page 7.
and location information shown on page 10 or 11.
Air openings must be provided
Combustion and ventilation air openings to be in accordance with
the section "Air for Combustion and Ventilation," of the National
Fuel Gas Code, ANSI Z223.1/NFPA 54 – latest edition, or applicable
provisions of the local building codes.
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 monoxide
emissions.
Air opening options
Two openings — Air supply from inside the building
1. If the building is of
unusually tight construction
page), the
building must also be provided with air openings directly
, sized and located per Figure 3, Figure 4 or Figure 5.
to the outside
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
12 inches of the ceiling and the floor, sized per Figure 2.
Two openings — Air supply directly from outside
1. Air openings must be directly through an outside wall, or into a space
that connects directly to the outside (such as a ventilated attic or crawl
space, for example).
2. See Figure 3 —
Openings directly through an outside wall
within 12 inches of the ceiling and the floor, sized per
two openings
Figure 3.
3. See Figure 4 —
Air supplied through vertical ducts
terminated within 12 inches of the ceiling and the floor, sized
openings
per Figure 4.
4. See Figure 5 —
Air supplied through horizontal ducts
within 12 inches of the floor and the ceiling, sized per
two openings
Figure 5.
10
Check the boiler placement compared to
apply the sizing
DO NOT
(see definition, next
through the interior wall, within
— provide
Boiler Manual
Figure 2 Air openings to interior spaces
✷
,
Figure 3 Air directly through outside wall
✷
Figure 4 Air from outdoors — vertical ducts
✷
✷
✷
Figure 5 Air from outdoors — horizontal ducts
✷
— provide
two
— provide
Part Number 550-142-302/0520