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Part number 550-100-400/0119
75
Vertical vent/air termination: 3” or 4” concentric
®
Series 4
gas-fired water boiler — Boiler Manual
Termination kit — 3” or 4” concentric termination
1. The 3” or 4” concentric termination kit must be purchased sepa-
rately. See below.
Use only the vent materials and kits listed in Fig-
ure 12, page 18 for concentric venting. Provide pipe
adapters as specifi ed in Figure 12, page 18 .
Allowable vent/air pipe materials
Use only the materials listed in Figure 13, page 19 .
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 12, page 18 .
2. Maximum lengths listed in Figure 12, page 18 allow for 1 elbow.
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 pro-
ceed to page 82 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 84 .
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 fl ue 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 fl ue products impinge on building surfaces
or plants.
d. Avoid possibility of accidental contact of fl ue 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 fi nishes.
4. Maintain clearances to termination as given below:
a. Vent outlet must be located:
Figure 84ertical termination or concentric
Figure 85ertical termination or concentric
multiple oilers
All vent and air pipes require a
. Most kits do not
include the screens. Purchase separately
from Weil-McLain or vent kit supplier if
not included.
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