Weil-McLain Evergreen EVG 110 Manual Download Page 30

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DIRECT VENT —

Sidewall concentric

Allowable vent/air pipe materials &
lengths

1. The concentric termination kit must be purchased

separately.

Use only the vent materials and kits

listed in Figure 23, page 24 . Provide pipe
adapters if speciﬁ ed.

2. Locate the termination such that the total air piping

and vent piping from the boiler to the termination
will not exceed the maximum length given in
Figure 22, page 23

3. This termination requires a 45-degree elbow that

is not supplied with the termination kit. The
maximum vent/air pipe lengths include allowance
for this elbow.

For polypropylene applications, comply

with any additional requirements in the
vent system manufacturer’s instructions.
Provide 3" PVC transition pieces at the
boiler vent and air connections and at the
termination if using a 3" PVC concentric
vent kit. 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 3" PVC transition
at the boiler vent connection. Air pipe
must be PVC or CPVC. Provide a 3" PVC
transition at the boiler air connection
if using 2" air pipe. Provide transition
pieces to PVC at the vent and air pipe
termination connections.

Determine termination location

1. The concentric termination kit must be installed

as shown in Figure 31, page 31 .

2. The termination must comply with clearances and

limitations shown in

Figure 24, page 26

3. Locate the 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.

Multiple vent/air terminations

1. When terminating multiple boilers, install each

concentric termination as described in this manual.

All vent pipes and air inlets must

terminate at the same height to avoid
possibility of severe personal injury,
death or substantial property damage.

2. Place wall penetrations to obtain minimum

clearance as shown in Figure 30, page 31 for U. S.
installations. For Canadian installations, provide
clearances required by CSA B149.1 or B149.2
Installation Code and a ULC S636 compliant vent
kit.

3. The air inlet of a boiler is part of a direct vent

connection. It is not classiﬁ ed as a forced air intake
with regard to spacing from adjacent boiler vents.

Figure 29

INSTALLATION SEQUENCE

— Concentric horizontal

Step 1

Read and follow all instructions in this manual.

DO NOT proceed

with vent/air installation until you have read page 22
through page 27 .

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 sidewall location.

Step 3

Make sure the selected sidewall termination location complies with

Figure 24, page 26

. (Multiple boiler concentric terminations must also

comply with Figure 30, page 31 .)

Step 4

Use only the vent materials listed in Figure 23, page 24 . Provide pipe
adapters where required.

Step 5

Vent piping and air piping lengths must not exceed the values shown
in

Figure 22, page 23

Step 6

The concentric termination must be assembled and installed before
piping from the boiler to the termination.

Step 7

Prepare the sidewall penetration — assemble the concentric
termination kit and secure the cover plates as instructed in this section.
Provide the supports indicated and mount the termination assembly.
See “Install termination — concentric pipes” on page 31 .

See notices at left.

Step 8

Install vent and air piping between the boiler and the concentric vent/
air termination. Slope horizontal piping downward toward the boiler
at least 1/4 inch per foot. See page 39 for general guidelines.

Step 9

Install pipe supports every 5 feet on both the horizontal and vertical
runs.

See notices at left.

Step 10

Install a hanger support within 6 inches of any upturn in the piping.

See notices at left.

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.

Part number 550-100-191/0917

as-fired water boiler —

70/110/155