Weil-McLain 2 Series Manual page 10

®
SlimFit Series 2
Prepare boiler
Provide air openings to room
Air openings — General
Follow the National Fuel Gas Code - ANSI Z223.1/NFPA54 – latest
edition (U.S.) or Natural Gas and Propane Installation Code - CAN/
CSA B149.1 (Canada) and all applicable codes to size/verify size of
the combustion/ventilation air openings into the space. See the vent-
ing instructions section of this manual for required air openings and
sizing for either direct vent or direct exhaust installation.
Air openings — SlimFit boiler alone in boiler room
For direct vent installations (air piped to
1. DIRECT VENT —
boiler), no air ventilation openings into boiler room are needed if
clearances around the SlimFit boiler are at least equal to the SER-
VICE clearances shown in Figure 2, page 7. For spaces that DO
NOT supply the minimum service access clearances, see the direct
vent venting instructions in this manual for required openings.
2. DIRECT EXHAUST — For direct exhaust installations (combus-
tion air from inside), provide air openings as specified in the direct
exhaust venting section of this manual.
Air openings — SlimFit boiler in same room with
other gas or oil-fired appliances
For direct vent installations (combustion air
1. DIRECT VENT —
piped to boiler), size openings only on the basis of the other appli-
ances in the space. No additional air opening free area is needed for
the SlimFit boiler because it takes its combustion air from outside.
For direct vent installations, when the SlimFit boiler is
located in the same room as other appliances, provide
combustion air openings correctly sized for all appli-
ances in the room except the SlimFit boiler.
Failure to comply with the above warnings could result
in severe personal injury, death or substantial property
damage.
10
COMMERCIAL CONDENSING GAS
- — Boiler Manual
FIRED WATER BOILER
2. DIRECT EXHAUST —
tion air openings into the room must be sized to handle the SlimFit
boiler and all other appliances. See the direct exhaust venting
instructions in this manual for required openings.
exhaust installations, the boiler draws combustion
air from the boiler room. If other appliances are
installed in the same room, provide combustion
air openings correctly sized for
including the SlimFit boiler.
Failure to comply with the above warnings could
result in severe personal injury, death or substan-
tial property damage.
Vent and air piping requirements
1. The SlimFit boiler requires a special vent system, designed for
pressurized venting.
a. SlimFit boilers are rated ANSI Z21.13 Category IV (pressur-
ized vent, likely to condense in the vent).
b. SlimFit commercial boilers can be either:
— vent to the outside, combustion air
from inside or . . .
— both vent and air piped outside.
c. See instructions beginning on page 22 for vent/air configura-
tion options and installation requirements.
2. Note "Prevention of combustion air contamination" on page 24
when considering vent/air terminations and boiler room condi-
tions when using inside air (direct exhaust installation).
3. Be sure to locate the boiler such that the vent and air piping can be
routed through the building and properly terminated. The vent/air
piping lengths, routing and termination method must all comply
with the methods and limits in instructions beginning on page 29.
For direct exhaust installations, combus-
— On direct
ALL appliances,
(page 22)
Part number 550-100-180/0917