37
MCA
Pro
45/65/90/115
MCA-Pro ISM Rv.4.1 2/2017
Air and vent piping termination options
1. The MCA Pro 35/45 are shipped with a
3”/80 mm size kit.
2. The MCA Pro 65/90/115 are shipped with a 4”/100
mm size kit.
3. For any other required parts and termination
options, refer to page 44.
Air and vent pipe requirements
Refer to the chart below for the air and vent pipe
diameters.
Boiler
Model
3” Plastic or
3” AL29-4C
4” Plastic or
4” AL29-4C
35/45
Yes
No
65
Yes
(with adapter)
yes
90
No
Yes
115
No
Yes
Where required, use the apropriate adapters. The MCA
Pro 35 to 45 requires 3”, MCA Pro 65 to 115=4" OD
pipe at the boiler air and vent connections.
Air and vent minimum length
The air and vent pipe each must be at least 2 feet long.
Air and vent pipe installation procedure
1. Install the MCA Pro boiler.
2. Determine the type of termination - vertical or
sidewall, separate pipes or concentric, etc.
3. Determine the proper location for roof or wall
penetration for each termination.
4. Install the termination assembly as per the
instructions in this manual.
5. Install the air and vent piping from the boiler to the
termination.
6. Install the pipe supports and brackets, if required.
Commonwealth of Massachusetts
If the boiler is installed within the Commonwealth of
Massachusetts it must:
- Be installed by a professional licensed heating
contractor, licensed plumber or gas fitter.
- Refer to page 46 or 47 or 48 for sidewall vent air
installations.
WARNING
Where the pipe size is different from the termination
connections, pipe adapters will need to be provided,
if necessary, and for all the AL29-4C Verne pipe
connections at the termination and at the boiler.
Allowable air and vents materials
Only use the materials that are listed on
page 34 + 39.
Maximum pipe length
1. Position the termination in such a way that the total
air and vent piping from the boiler to the termination
does not exceed the maximum length shown on page
45 to 50.
Connection from the boiler to the termination
Read the following instructions on how to install the
termination.
Determine the location for the termination cap
DANGER
A gas vent which extends through an exterior wall
cannot terminate next to the wall or below any
building extensions such as balconies, eaves, decks
or parapets. Failure to heed this warning could
result in death, severe personal injury or substantial
product/property manage.
4. Installation
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