DIRECT VENT — Vertical vent / sidewall air
Figure 43
INSTALLATION SEQUENCE
—
Vertical vent/
sidewall air
Allowable vent/air pipe materials & lengths
Use only the vent materials and kits listed in
Figure 24, page 21. Provide pipe adapters if
specified.
1. Locate the terminations such that the total air pip-
ing and vent piping from the boiler to the termina-
tion will not exceed the maximum length given in
Figure 23, page 20.
For polypropylene applications, comply with
any additional requirements in the vent sys-
tem manufacturer’s instructions. Provide 4”
PVC-to-PP transition pieces at the boiler vent
and air connections. PP adapter must have
smooth, straight section of pipe to insert in to
the boiler vent and air connections and must
fit and seal tightly. PP adapters with their own
seal which would interfere with the internal
seal of the boiler vent or air connections must
not be used. Refer to page 117 for a list of
compliant adapters. Install a locking collar at
every joint.
For AL29-4C vent pipe applications, comply
with any additional requirements in the vent
system manufacturer’s instructions. Provide
a 4” PVC transition piece at the boiler vent
connection. The air piping must be PVC or
CPVC.
2. For 4” to 3” transitions, must use appropriate vent
material. For polypropylene or stainless steel must use
approved suppliers transitions (EVG 220 only).
Prepare roof penetration
1. Vent pipe penetration:
a. Cut a hole for the vent pipe. For either combustible
or noncombustible construction, size the vent pipe
hole at least 0.4” larger than the vent pipe diameter.
b. Insert a galvanized metal thimble in the vent pipe
hole.
2. Follow all local codes for isolation of vent pipe when
passing through floors, ceilings and roofs.
3. Provide flashing and sealing boots sized for the vent
pipe and air pipe.
Vent termination and fittings
1. Prepare the vent termination coupling by inserting a
bird screen. Bird screens must be purchased separately.
See the parts list at the end of this manual for part
numbers.
2. Maintain the required dimensions of the finished ter-
mination piping as shown in Figure 44.
Multiple vent terminations
1. When terminating multiple
Evergreen
boilers, terminate
each vent/air connection as described in this section.
2. Place adjacent terminations at least 6 inches apart.
3. For Canadian installations, provide clearances required
by Natural Gas and Propane Installation
CAN/CSA
B149.1 or B149.2 Installation Code.
Part number 550-100-131/0120
– 36 –
®
gas
-
fired
water
boiler
— 220/299/300/399
Boiler Manual
Step 1
Read and follow all instructions in this manual.
DO NOT
proceed with vent/air installation until you have read
page 19 through page 24.
See notices
at left.
Step 2
Install the boiler in a location that allows proper routing of all
vent and air piping to the selected locations.
Step 3
Make sure the selected vertical termination location complies
with Figure 25, page 23.
Step 4
Use only the vent materials listed in Figure 24, page 21. Provide
pipe adapters where required. Vent piping and air piping lengths
must not exceed the values shown in Figure 23, page 20.
Step 5
Prepare the vertical penetration (vent) and sidewall penetration
(air) and secure penetration components as instructed in this
section.
Step 6
The air piping must terminate in a 90-degree
down-turned
elbow
as shown above. The vent piping must terminate in a
coupling pointed upward
as shown above.
Step 7
Install vent and air piping between the boiler and the air and
vent terminations. Slope horizontal piping downward toward
the boiler at least 1/4 inch per foot. Install pipe supports every
5 feet on both the horizontal and vertical runs. Install a hanger
support within 6 inches of any upturn in the piping. See page 38
for general guidelines. Also comply with vent pipe manufacturer’s
instructions.
See notices at left.
Step 8
Insert the vent and air piping through the penetrations and
secure the termination fittings.
Step 9
Maintain clearances shown in this section. Vent and air termina-
tions must be fitted with bird screens as shown.
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.
