Ultra Boiler Manual

Part number 550-100-440/0122
68
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Provide pipe adapters as needed where pipe size is
dierent from termination connections or boiler
connections, and for all AL29-4C vent pipe con-
nections at the boiler and the termination.
Allowable vent/air pipe materials
1. 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69.
2. Maximum lengths listed in Figure69 allow for 2 elbows.
Additional elbows required a reduction in maximum length
as explained in the table notes.
Figure 69 Maximum piping lengths for Weil-McLain sidewall vent/
air plate
Connecting from termination to boiler
1. Install the termination as instructed in the following. en
proceed to page71 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
extensions such as eaves, parapets, balconies or decks.
Failure to comply could result in severe personal
injury, death or substantial property damage.
1. Locate the vent/air terminations using the following guidelines.
2. You must consider the surroundings when terminating the
vent and air:
a. Position the vent termination where vapors will not damage
nearby shrubs, plants or air conditioning equipment or be
objectionable.
b. e ue products will form a noticeable plume as they
condense 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 ue products impinge on building
surfaces or plants.
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 allowable 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.
Figure 70 Termination location – Weil-McLain vent/air plate – height
above grade or snow line
Weil-McLain cap (cont.)