Ultra Boiler Manual
Part number 550-100-440/0122
91
ADVANCED INSTALLATION
Figure 104 Boiler vent and air connections
AL29-4C vent pipe — If using AL29-4C stain-
less vent pipe, you must install a PVC-to-vent
pipe adapter at the boiler vent connection (and
at the termination if using the Weil-McLain
plate or the concentric termination). Use only
the adapter made by the vent pipe manufac-
turer.
1. PVC/ABS pipe — Clean and chamfer insertion end of
pipe. Deburr inside of insertion end. Clean and deburr
inside and outside of other end of pipe.
e pipe end must be smooth and chamfered
to prevent possible damage to sealing gasket
in vent or air pipe adapter. Failure to comply
could result in leakage, causing possible severe
personal injury or death.
2. Inspect vent or air adapter (above) — verify no obstruc-
tions or foreign objects inside.
3. Loosen clamp screw.
4. Measure 3½ inches from end of pipe and make a mark
with felt-tip pen.
5. Loosen adapter clamp screw.
6. Apply small amount of silicon grease to end of pipe to
ease insertion.
7. Insert pipe into adapter.
8. Slide pipe down until the 3½-inch mark is reached.
Do not apply excessive force or bend the adapter
or ue/air pipe when inserting. e adapter or
seal could be damaged.
9. Secure vent or air pipe by tightening the adapter clamp
securely. Do not overtighten. e seal is accomplished
with the internal gasket. e clamp is only to hold the
pipe in place.
Air inlet opening protection: Obtain a bird
screen (sized for air inlet opening) the from
WM Technologies. Insert the bird screen into
the air inlet opening to prevent foreign objects
from falling into the opening.