Installation Guide
Part number 550-100-066/0608
33
g a s -f i r e d w at e r b o i l e r — Boiler Manual
Sidewall vent/air termination: Weil-McLain plate
Feet Elbows Feet Elbows Feet Elbows
80 30 2 100 2
Not
allowed
105 30 2 100 2
155 Not allowed 100 2
230 Not allowed 30 2 100 2
310 Not allowed Not allowed 100 2
* Install pipe reducers to adapt from pipe size used to the 3.5
inch outside diameter required at the termination. You do not
have to reduce allowable pipe length for the reducers. Also
install reducers as necessary where connecting to the boiler
vent and air connections.
For piping using more than 2 elbows, reduce maximum allow-
able length:
• 7 feet for each additional 4-inch elbow (90° or 45°)
• 7 feet for each additional 3-inch long radius elbow
• 16 feet for each 3-inch short radius elbow
• 7 feet for each 3-inch 45-degree elbow.
Termination location — Weil-McLain vent/air
plate — height above grade or snow line
Termination kit — Weil-McLain vent/air plate
The Weil-McLain sidewall vent/air kit is shipped with each Ultra 1.
boiler.
Provide pipe adapters as needed for 2” or 4” plastic piping
or for AL29-4C vent pipe.
Allowable vent/air pipe materials
Use only the materials listed in 1. Figure 32, page 31.
Maximum piping length
Locate the termination such that the total air piping and vent piping 1.
from the boiler to the termination will not exceed the maximum
length given in Figure 35.
Maximum lengths listed in 2. Figure 35 allow for 2 elbows. Additional
elbows required a reduction in maximum length as explained in
the table notes.
Connecting from termination to boiler
Install the termination as instructed in the following. Then pro-1.
ceed to page 48 to complete the air and vent piping between the
termination and the boiler.
Determine locations for terminations
A gas vent extending through an exterior wall shall not
terminate adjacent to the wall or below building exten-
sions such as eaves, parapets, balconies or decks. Failure
to comply could result in severe personal injury, death
or substantial property damage.
Locate the vent/air terminations using the following guidelines.1.
You must consider the surroundings when terminating the vent 2.
and air:
Position the vent termination where vapors will not damage a.
nearby shrubs, plants or air conditioning equipment or be
objectionable.
The ue products will form a noticeable plume as they con-b.
dense in cold air. Avoid areas where the plume could obstruct
window views.
Prevailing winds could cause freezing of condensate and water/c.
ice buildup where ue products impinge on building surfaces
or plants.