Prepare Boiler; Provide Air Openings To Room - Weil-McLain SlimFit Manual

SlimFit
™
commercial condensing gas

Prepare boiler

Provide air openings to room

Air openings — General
Follow the National Fuel Gas Code (U. S.) or CSA B149.1 and B149.2
(Canada) and all applicable codes to size/verify size of the combus-
tion/ventilation air openings into the space. See the venting instruc-
tions 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
1. DIRECT VENT —
For direct vent installations (air piped to
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
1. DIRECT VENT — For direct vent installations (combustion air
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
-
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.
Direct exhaust installations
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:
Direct-exhaust
from inside or . . .
Direct-vent
c. See instructions beginning on page 28 for vent/air configura-
tion options and installation requirements.
2. Note "Prevention of combustion air contamination" on page 29
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.
— Boiler Manual
For direct exhaust installations, combus-
ALL
— vent to the outside, combustion air
— both vent and air piped outside.
Part number 550-100-116/0713
— On direct
appliances,
(page 28)