Part number 550-143-010/1021
37
GV90+
series
2
gas-fired water boiler – boiler manual
Allowable vent/air pipe materials &
lengths
Use only the vent materials and kits
listed in
. Provide pipe
adapters if specified.
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
Determine termination location
1. The vent/air cap must be installed as shown in
.
2. The termination must comply with clearances and
limitations shown in
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 GV90+ boilers,
terminate each vent/air connection 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 clear-
ance as shown in
for U. S.
installations. For Canadian installations, provide
clearances required by CSA B149.1 Natural Gas
and Propane Installation Code. or B149.2 Instal-
lation Code.
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.
4. Combustion air (NOT vent piping) can be mani-
folded as shown in
.
Figure 43
INSTALLATION
— W-M sidewall vent/air plate
Step 1
Read and follow all instructions in this manual.
DO NOT
proceed with vent/air installation until you have read
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 com-
plies with
. (Multiple boiler sidewall plates
must also comply with
Step 4
Use only the vent materials listed in
Provide pipe adapters where required.
Step 5
Vent piping and air piping lengths must not exceed the
values shown in
.
Step 6
Prepare the sidewall penetrations and secure the sidewall
plates as instructed in this section. See
.
Step 7
The Weil-McLain plate termination must be installed before
piping from the boiler to the termination.
Step 8
Install vent and air piping between the boiler and the vent/
air termination plate. Slope horizontal piping downward
toward the boiler at least 1/4 inch per foot. See
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.
DIRECT VENT
—
Sidewall with W-M (optional) vent/air plate
The Weil-McLain vent/air termination
cap can be used to terminate the vent
pipe for multiple boiler applications
using the manifolded combustion
air option. The vents must be lo-
cated following the restrictions in
.