Weil-McLain Aqua Balance WMB-155 Manual page 33

W
TM
AquaBalance
15 Vent and air piping and boiler connections
Figure 41
Vent (flue) and air adapters in place
Vent and Air adapters to be installed with test ports facing to
front of boiler. Must be locked closed.
7. The adapter accepts 3" PVC, CPVC, Polypropylene and
AL29-4C material. Use a 2" adapter (WMB-80/120 only),
if needed.
For AL29-4C vent pipe applications, comply
with any additional requirements in the vent system manu-
facturer's instructions. Provide a AL29-4C starter piece
from the AL29-4C manufacturer to the transition at the
boiler vent connection.
8. Cut pipe to required lengths.
9. Dry assemble entire vent or air piping to ensure proper fit
before assembling any joint.
10. Maintain minimum clearance of
pipe and any combustible wall or material.
11. Assembling PVC or CPVC: (
manufacturer's instructions for preparation and assembly)
a. Deburr inside and outside of pipe ends.
b. Chamfer outside of each pipe end to ensure even cement
distribution when joining.
c. Clean all pipe ends and fittings. Dry thoroughly.
d. For each joint:
• Handle fittings and pipes carefully to prevent con-
tamination of surfaces.
• Apply primer liberally to both joint surfaces — pipe
end and fitting socket.
• While primer is still damp, lightly apply approved
cement to both surfaces in a uniform coating.
• Apply a second coat to both surfaces. Avoid using
too much cement on sockets to prevent cement
buildup inside.
• With cement still wet, insert pipe into fitting, twist-
ing ¼ turn. Make sure pipe is fully inserted.
• Wipe excess cement from joint. Check joint to be
sure a smooth bead of cement shows around the
entire joint.
12. Seal wall or floor penetration openings following local code
requirements.
Part number 550-100-305/0118
M -
ALL OUNT GAS FIRED WATER BOILER
inch between vent
3/16
— follow pipe
—
Boiler Manual
ADAPTERS — Use adapters if using 2-inch pipe,
(WMB-80/120 only)
1. Clean and deburr inside and outside of both ends of air and vent
pipes. Chamfer boiler end of vent pipe for ease of insertion.
The vent pipe end must be smooth and chamfered to
prevent possible damage to sealing gasket in vent pipe
adapter.
2. Inspect vent or air adapter (above) — verify no obstructions or
foreign objects inside.
3. Loosen clamp screw (if used).
4. Measure 2¼-inches from end of pipe and make a mark with felt-
tip pen.
5. Apply small amount of silicon grease to end of pipe to ease inser-
tion.
6. Insert pipe into adapter.
7. Slide pipe down until the 2¼-inch mark is reached.
Do not apply excessive force or bend the adapter or
flue/air pipe when inserting. The adapter or seal could
be damaged. If any portion of the vent or air system is
damaged, it must be replaced.
8. The seal is accomplished with the internal gasket.
USE SWEEP ELBOWS FOR ALL VENT
AND AIR PIPING — DO NOT use short radius
elbows for vent or air piping. Boiler performance
could be affected.
(continued)
33