Weil-McLain Series 2 Manual page 36

® S
ERIES
DIRECT VENT —
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 transitions 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
Locate the concentric vent/air termination using the
following guidelines:
1. The concentric vent/air assembly must terminate
as shown in Figure 40, page 37
2. The termination must comply with the 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.
4. For Canadian installations, follow requirements
of CSA B149.1 or B149.2 Installation Code and a
ULC S636 compliant vent kit.
Multiple vent/air terminations
1. When terminating multiple ECO boilers, install
the concentric vent/air termination assemblies as
described in this manual.
All vent outlets must terminate at the
same height to avoid possibility of severe
personal injury, death or substantial
property damage.
36
2
-
G
AS FIRED WATER BOILER
Vertical concentric
— Boiler Manual
Figure 38
INSTALLATION SEQUENCE
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 .
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 vertical termination location complies with
Figure 24, page 26 . (Multiple boiler concentric terminations must also
comply with Figure 39, page 37 .)
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 vertical penetration(s) — assemble the concentric
termination kit and secure the penetration components as instructed
in this section. Provide the supports indicated and mount the
termination assembly. See "Prepare roof penetrations" on page 37
and "Mount concentric termination" on page 37 .
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 41 for general guidelines.
Step 9 Install pipe supports every 5 feet on both the horizontal and vertical
runs.
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.
— Concentric vertical
See notices at left.
See notices at left.
Part number 550-142-190/1218