TRIM OFF HERE
VENT & AIR PIPING
(see boiler manual for details)
Slide the air inlet pipe and vent pipe into the boiler top
openings. Just tighten the restraining rings — no messy sealants
required. Reducers or adapters are required when the vent / air
pipe O. D. is different from the boiler connection diameter (see
below). All AL29-4C stainless pipe applications require adapters
made by the vent pipe manufacturer. See the material checklist
for items required.
Ultra boilers can be sidewall vented or vertically vented as shown
in the five options below and in the manual. Choose either direct
vent (D. V. — requires air pipe for combustion air) or direct exhaust
(D. E. — uses inside air) as shown.
Make sure the terminations are placed as required in the
manual and that air intakes are at least 12 inches above normal
snow line.
Vertical D. V.
Concentric Pipes
termination
Requires kit
Vertical
Direct Exhaust
(no air pipe)
–or–
Vertical Direct Vent with
Separate Pipes
termination
Requires bird screen(s)
Sidewall D. V.
with Weil-McLain
termination
Included with boiler
Sidewall Direct Exhaust
(no air pipe)
–or–
Sidewall Direct Vent with Separate Pipes
termination
Requires bird screen(s)
Sidewall D. V. with
Concentric Pipes
termination
Requires kit
33
Support pipes as
described in the
manual.
Vent / air pipe size options (PVC sizes):
Ultra-80, 105: 2" or 3”
Ultra-155: 3"
Ultra-230: 3" or 4”
Ultra-299, 399: 4”
Slope pipes ¼”
per
foot t
owar
d boiler
.
Direct Exhaust
Direct Vent
