Weil-McLain ULTRA299-S4 Manual page 88

S 4
®
ERIES
DIRECT EXHAUST — Sidewall
8. Locate termination so it is not likely to be damaged by foreign
objects, such as stones or balls, or subject to buildup of leaves
or sediment.
9. Do not connect any other appliance to the vent pipe. Do not
connect multiple boilers to a common vent pipe.
Completing the vent piping
1. Install vent penetration as explained in the following before in-
stalling vent piping from the boiler to the termination.
2. Insert piping from boiler vent connections, then attach exterior
termination piping.
3. Follow instructions beginning on page 91 to complete piping
from boiler to termination.
Multiple vent terminations
1. When terminating multiple direct exhaust Ultra boilers, terminate
each vent connection as described in this manual for individual
vents. Space terminations as required for best installation prac-
tices and required maintenance.
Prepare wall penetrations
1. Wall penetration:
a. Cut a rough opening large enough to clear the diameter of
the metal thimble used.
b. Provide metal cover plates (item 2, Figure 101 ). The outer
plate MUST provide a stop to prevent the vent elbow from
being pushed inward. (See NOTICE at right.) Hole diameters
in the metal plates must be:
2-inch PVC, CPVC or ABS — 2
3-inch PVC, CPVC or ABS — 3
4-inch PVC, CPVC or ABS — 4
AL29-4C vent pipe and elbow — size hole large enough
to clear vent pipe, but small enough to prevent the elbow
from being pushed through.
c. Insert the galvanized metal thimble (by installer) in the vent
pipe hole as shown in Figure 101 .
2. Follow all local codes for isolation of vent pipe when passing
through fl oors or walls.
Termination and fi ttings
1. Prepare the vent termination elbow ( Figure 98, page 87 ) by in-
serting a bird screen. Bird screens are not supplied with the Ultra
boiler. Purchase separately from Weil-McLain.
2. You can install the vent termination using either of the confi gura-
tions shown in Figure 98, page 87 .
3. Maintain the required dimensions of the fi nished termination
piping as shown in Figure 98, page 87 .
4. Seal exterior openings thoroughly with exterior caulk.
5. Do not extend exposed vent pipe outside of the building more
than shown in this document. Condensate could freeze and block
vent pipe.
88
-
GAS FIRED WATER BOILER
1 ⁄ " hole diameter.
2
5 ⁄ " hole diameter.
8
5 ⁄ " hole diameter.
8
— Boiler Manual
(continued)
DIRECT EXHAUST — Sidewall —
termination assembly — all parts by
installer
1 Vent piping
2 Cover plates
3 Galvanized thimble
The Weil-McLain sidewall termination kit
supplied with each boiler includes metal
plates with two openings. These plates can
be trimmed and used for direct exhaust vent
termination cover plates when the vent diam-
eter used matches the hole size in the plates
provided with the boiler.
4 Vent termination elbow
5 Bird screen
Part number 550-100-400/0717