Direct Vent - Vertical Vent /Sidewall Air - Weil-McLain Series 2 Manual

® S
ERIES
DIRECT VENT —
Determine location for air inlet elbow
1. The air inlet of an ECO boiler is part of a direct vent connection.
It is not classified as a forced air intake with regard to spacing
from adjacent appliance terminations.
2. Locate the air inlet elbow (termination) using the following
guidelines.
3. The air piping must terminate in a down-turned elbow as shown
in Figure 43.
a. Apply the configuration on the left side of Figure 43 unless
the terminations would fail to meet minimum clearance to
grade or snow line.
b. Apply the configuration on the right side of Figure 43 when
the terminations need to be raised higher to meet clearance
to grade or snow line.
c. The air pipe may run up the side of the building, as shown.
The vent and air pipes must be secured with braces, and all
clearances and lengths must be maintained. Space braces no
further than 24 inches apart.
4. You must consider the surroundings when terminating the air
connection:
a. Make sure there are no obstructions for air flow. DO NOT
locate the termination where plants could grow and cause
obstruction to air flow.
b. Do not locate the terminations where wind eddies could affect
performance or cause recirculation with exhaust from other
appliances, such as inside building corners, near adjacent
buildings or surfaces, window wells, stairwells, alcoves,
courtyards or other recessed areas.
c. Locate the air inlet termination at least 12 inches below and 12
inches horizontally from any appliance or building vent outlet.
5. 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.
Multiple air terminations
1. When terminating multiple ECO boiler air connections, terminate
each air connection as described in this manual.
2. Place wall penetrations to obtain minimum clearances as
instructed in this manual.
3. Place adjacent air inlets for multiple ECO boilers at least 6 inches
apart.
4. For Canadian installations, provide clearances required by Natural
Gas and Propane Installation CAN/CSA B149.1 or B149.2
Installation Code
Prepare wall penetrations
1. Air pipe penetration:
a. Cut a hole for the air pipe. Size the air pipe hole as close as
desired to the air pipe outside diameter.
2. Seal exterior openings thoroughly with exterior caulk.
Termination and fittings
1. Prepare the air termination elbow (Figure 43) by inserting a bird
screen. Bird screens must be purchased separately. See the parts
list at the end of this manual for part numbers.
2. Use metal plates (by installer) at inside and outside penetrations
using the method shown in Figure 28, page 29.
If extending the air pipe out from the wall, install a
coupling on each pipe. Mount the piping with the
coupling flush with the outer plate.
Part number 550-142-190/1218
2
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G
AS FIRED WATER BOILER
Vertical vent /sidewall air
— Boiler Manual
Figure 42
Vent termination (through the roof) for
direct vent: vertical vent / sidewall air
Figure 43 Sidewall air inlet (termination) for direct
vent: vertical vent / sidewall air
(continued)
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