Specifications

Part number 550-100-090/0809
19
g a s -f i r e d w a t e r b o i l e r — Boiler Manual
BASIC INSTALLATION
Sidewall vent/air termination: Weil-McLain cap (continued)
Figure 15 Maximum piping lengths for Weil-
McLain sidewall vent/air plate
Boiler
Ultra–
Maximum
Piping, 2” *
Maximum
Piping, 3” *
Maximum
Piping, 4” *
Feet Elbows Feet Elbows Feet Elbows
80 ** 100 2 100 2
Not
allowed
105 ** 100 2 100 2
155 Not allowed 100 2
230 Not allowed 30 2 100 2
299 Not allowed Not allowed 100 2
399 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.
** Ultra-80 and 105 boilers installed with 2-inch vent piping
automatically derate due to the pressure loss in the vent and
air piping. The derate ranges up to 10% for the Ultra-80 at 100
feet or 15% for the Ultra-105 at 100 feet.
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 2 or 3-inch long radius elbow
• 16 feet for each 2 or 3-inch short radius elbow
• 7 feet for each 2 or 3-inch 45-degree elbow.
Provide pipe adapters as needed where pipe
size is different from termination connections
or boiler connections, and for all AL29-4C
vent pipe connections at the boiler and the
termination.
Allowable vent/air pipe materials
Use only the materials listed in 1. Figure 12, page 17.
Maximum piping length
Locate the termination such that the total air piping and 1.
vent piping from the boiler to the termination will not
exceed the maximum length given in Figure 15.
Maximum lengths listed in 2. Figure 15 allow for 2 elbows.
Additional elbows required a reduction in maximum
length as explained in the table notes.
Termination location — Weil-McLain vent/air plate — Figure 16
height above grade or snow line
Connecting from termination to boiler
Install the termination as instructed in the following. Then pro-1.
ceed to page 22 to complete the air and vent piping between the
termination and the boiler.
Determine location for termination cap
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 flue 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 c.
water/ice buildup where flue products impinge on building
surfaces or plants.