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DIRECT VEN T
Figure43 INSTALLATIONSEQUENCE — Vertical vent/
sidewall air
Allowablevent/airpipematerials&lengths
Use only the vent materials and kits listed in
Figure24,page21. Provide pipe adapters if
specied.
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
Figure23,page20.
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
t 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 page117 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. e 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).
Prepareroofpenetration
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 oors, ceilings and roofs.
3. Provide ashing and sealing boots sized for the vent
pipe and air pipe.
Ventterminationandttings
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 nished termi-
nation piping as shown in Figure44,page37.
Multipleventterminations
1. When terminating multiple Evergreen boilers, ter-
minate 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 550-100-211/0122
– 36 –
Step1 Read and follow all instructions in this manual. DO NOT
proceedwithvent/airinstallationuntilyouhaveread
page19throughpage24.
See notices
at le.
Step2 Install the boiler in a location that allows proper routing of all
vent and air piping to the selected locations.
Step3 Make sure the selected vertical termination location complies
with Figure25,page23.
Step4 Use only the vent materials listed in Figure24,page21. Provide
pipe adapters where required. Vent piping and air piping lengths
must not exceed the values shown in Figure23,page20.
Step5 Prepare the vertical penetration (vent) and sidewall penetra-
tion (air) and secure penetration components as instructed in
this section.
Step6 e air piping must terminate in a 90-degree down-turned
elbow as shown above. e vent piping must terminate in a
couplingpointedupward as shown above.
Step7 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 6inches of any upturn in the piping. See page38
for general guidelines. Also comply with vent pipe manufacturer’s
instructions.
See notices at le.
Step8 Insert the vent and air piping through the penetrations and secure
the termination ttings.
Step9 Maintain clearances shown in this section. Vent and air termina-
tions must be tted with bird screens as shown.
USESWEEPELBOWSFORALLVENTAND
AIR PIPING — DO NOT use short radius elbows
for vent or air piping. Boiler performance could be
aected.
220 /29 9/3 00 /39 9
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