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GAS-FIRED WATER BOILER — Boiler Manual
Part number 550-101-233/0903
19
Venting, combustion air & condensate line
4
Prepare condensate fittings
1. Remove PVC fittings and gasket from the accessories
bag.
2. Deburr and chamfer outside and inside of ½" x 1¼"
PVC nipple to ensure even cement distribution when
joining.
3. Clean nipple ends and all fittings. Dry thoroughly.
4. For each joint in the condensate line, apply the
following. Assemble parts ONLY in the order given.
a. Apply primer liberally to both joint surfaces — pipe
end and fitting socket.
b. While primer is still damp, lightly apply approved cement
to both surfaces in a uniform coating.
Figure 11 Condensate trap assembly
Install vent and combustion air
piping
Ultra Boiler must be vented and supplied
with combustion and ventilation air as
described in Weil-McLain Ultra Boiler Vent
Supplement (included in envelope
assembly). Ensure the vent and air piping
and the combustion air supply comply
with these instructions regarding vent
system, air system and combustion air
quality. See also Section 1 of this manual.
Inspect finished vent and air piping
thoroughly to ensure all are airtight and
comply with the instructions provided and
with all requirements of applicable codes.
Failure to provide a properly-installed vent
and air system will cause severe personal
injury or death.
c. Apply a second coat of cement to both surfaces. Avoid
using too much cement on sockets to prevent cement
buildup inside.
d. With cement still wet, insert pipe into fitting, twisting
¼ turn. Make sure pipe is fully inserted.
e. Wipe excess cement from joint. Check joint to be sure
a smooth bead of cement shows around the entire
joint.
5. See Figure 11.
6. Assemble the ½" PVC nipple to the PVC reducing
elbow as shown.
7. Allow joint to dry completely. Then slide gasket over
nipple as shown.
8. Slide nipple through jacket condensate line hole to
position as shown in Figure 13, page 20.
9. Cement the ½" tee to the protruding ½" nipple. Be
sure both nipple and reducing elbow finish upright.
IMPORTANT: Firmly press the reducing elbow and
the tee together while the cement sets to ensure the
gasket is securely compressed. The gasket ensures the
jacket enclosure is airtight at this location.