Direct Vent - Vertical With 3" Concentric - Weil-McLain 2 Series Manual

series
GV90+
DIRECT VENT —
Allowable vent/air pipe materials &
lengths
1. The 3" concentric termination kit must be purchased
separately.
Use only the vent materials and kits listed
in Figure 40, page 33. Provide pipe adapters
if specified.
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 39, page 32.
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.
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 56, page 46.
2. The termination must comply with the clearances and
limitations shown in Figure 41, page 35.
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 Natural Gas and Propane Installation
Code or B149.2 Installation Code.
Multiple vent/air terminations
1. When terminating multiple GV90+ 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 per-
sonal injury, death or substantial property
damage.
2. Place roof penetrations to obtain minimum
of 12 inches between centers of adjacent vent
pipe of another boiler for U. S. installations (see
Figure 56, page 46).
3. The air inlet of a GV90+ boiler is part of a direct vent
connection. It is not classified as a forced air intake
with regard to spacing from adjacent boiler vents.
Prepare roof penetrations
1. Roof penetration hole:
a. Cut a 5-inch diameter hole to clear the 4½-inch
termination outside 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 con-
centric termination outside diameter.
Part number 550-143-010/1021
gas-fired water boiler – boiler manual
2
Vertical with 3" concentric
Figure 55 INSTALLATION SEQUENCE
Read and follow all instructions in this manual.
Step 1
proceed with vent/air installation until you have read
page 29 through
Step 2 Install the boiler in a location that allows proper routing
of all vent and air piping to the selected sidewall location.
Make sure the selected vertical termination location com-
Step 3
plies with Figure 41, page 35. (Multiple boiler concentric
terminations must also comply with Figure 56, page 46.)
Use only the vent materials listed in Figure 40, page 33.
Step 4
Provide pipe adapters where required.
Vent piping and air piping lengths must not exceed the
Step 5
values shown in Figure 39, page 32.
Step 6 The concentric termination must be assembled and in-
stalled before piping from the boiler to the termination.
Prepare the vertical penetration(s) — assemble the
Step 7
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 45
concentric termination" on
Install vent and air piping between the boiler and the
Step 8
concentric vent/air termination. Slope horizontal piping
downward toward the boiler at least 1/4 inch per foot.
See page 48 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.
— Concentric vertical
page 35.
and
page 46.
DO NOT
"Mount
45