Vertical Vent/Air Termination: 3" Or 4" Concentric - Weil-McLain Ultra Manual Addendum

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GAS FIRED WATER BOILER
Vertical vent/air termination:
Termination kit — 3" or 4" PVC concentric
termination
1. The 3" or 4" PVC concentric termination kit must be purchased
separately. See below.
Use only the vent materials and kits listed in Fig-
ure 2, page A-4 and Figure 4, page A-6 for concentric
venting. Provide pipe adapters as specified in Fig-
ure 4, page A-6.
Allowable vent/air pipe materials
Use only the materials listed in Figure 5, page A-7.
Maximum piping length
1. Locate the termination such that the total air piping and vent piping
from the boiler to the termination will not exceed the maximum
length given in Figure 4, page A-6.
2. Maximum lengths listed in
Additional elbows required a reduction in maximum length as
explained in the table notes.
Connecting from termination to boiler
1. Install the termination as instructed in the following. Then proceed
to page A-18 to complete the piping between the termination and
the boiler.
Determine location
Locate the concentric vent/air termination using the following guide-
lines:
1. The concentric vent/air assembly must terminate as shown in
Figure 12.
2. The vent and air piping connected to the termination assembly
must comply with the instructions in this supplement.
3. You must consider the surroundings when terminating the vent
and air:
a. Position the termination where vent vapors will not damage
nearby shrubs, plants or air conditioning equipment or be
objectionable.
b. The flue products will form a noticeable plume as they con-
dense in cold air. Avoid areas where the plume could obstruct
window views.
c. Prevailing winds could cause freezing of condensate and water/
ice buildup where flue products impinge on building surfaces
or plants.
d. Avoid possibility of accidental contact of flue products with
people or pets.
e. Do not locate the termination 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. Locate or guard vent outlet to prevent condensate damage to
exterior finishes.
Part number 550-100-103/1110
— Manual addendum — Venting
Figure 4, page A-6 allow for 1 elbow.
3" or 4" concentric
Figure 12
Vertical termination — 3" or 4" PVC
concentric
Figure 13
Vertical termination — 3" or 4" PVC
concentric — multiple boilers
All vent and air pipes require a
at each termination
include the screens. Purchase separately
from Weil-McLain or vent kit supplier if
not included.
bird screen
. Most kits do not
A–11