Weil-McLain SlimFit 2 Series Manual page 35

™
SlimFit
COMMERCIAL CONDENSING GAS
DIRECT VENT — Sidewall
d. Avoid possibility of accidental contact of flue products with
people or pets.
e. Do not locate the terminations where wind eddies could affect
performance or cause recirculation, such as inside building
corners, near adjacent buildings or surfaces, window wells,
stairwells, alcoves, courtyards or other recessed areas.
f. Do not terminate above any door or window or under a deck.
Condensate can freeze, causing ice formations.
g. Locate or guard vent to prevent condensate damage to exterior
finishes.
5. Maintain clearances as shown in the illustrations in this manual
section. Also maintain the following:
a. Vent must terminate:
At least 6 feet from adjacent walls.
No closer than 5 feet below roof overhang.
At lease 3 feet above any forced air intake within 10 feet.
b. Do not terminate closer than 4 feet horizontally from any elec-
tric meter, gas meter, regulator, relief valve or other equipment.
6. Because the SF-550 and SF-750 are condensing appliances, the Na-
tional Fuel Gas Code, ANSI Z223.1, requires that the vent must not
terminate over a public walkway or over an area where condensate
or vapor could create a nuisance or hazard, or could be detrimental
to the operation of regulators, relief valves, or other equipment.
7. Where the vent or air pipe penetrates an outside wall, the annular
space around the penetration must be permanently sealed using
approved materials to prevent entry of combustion products into
the building.
8. Locate terminations so they are not likely to be damaged by foreign
objects, such as stones or balls, or subject to buildup of leaves or
sediment.
9. Do not connect any other appliance to the vent pipe or multiple
boilers to a common vent pipe.
Completing the vent/air piping
1. Install vent/air penetrations as explained in the following pages
before installing vent and air piping from the boiler to the termi-
nations. Insert piping from boiler air and vent connections, then
attach exterior termination piping.
2. Follow instructions beginning on page 40 to complete piping from
boiler to termination.
Multiple vent/air terminations
1. When terminating multiple SlimFit boilers, terminate each vent/
air connection as described in this manual.
All vent pipes and air inlets must terminate at the same
height to avoid possibility of severe personal injury, death
or substantial property damage.
2. Place wall penetrations to obtain minimum clearance of 12 inches
between vent pipe and adjacent air inlet elbow, as shown in Fig-
ure 31, page 35 for U. S. installations.
3. For Canadian installations, provide clearances required by CSA
B149.1 or B149.2 Installation Code.
4. The air inlet of an SlimFit boiler is part of a direct vent connection.
It is not classified as a forced air intake with regard to spacing from
adjacent boiler vents.
5. Combustion air (NOT vent piping) can be manifolded as shown
in Figure 24, page 31.
Part number 550-100-162/0815
—
-
FIRED WATER BOILER
(continued)
Boiler Manual Series 2
Multiple terminations — separate pipes —
clearance from vent of one to air intake of
the next
Multiple terminations — separate pipes —
clearance from vent of one to air intake of
the next — alternate configuration of air
and vent terminations
If the vent/air pipes are extended out beyond
the wall, install a coupling at the exit opening,
with the coupling butted against the outside
plate. Then continue vent/air piping from the
coupling.
35