
MCA
Pro
45/65/90/115
MCA-Pro ISM Rv.4.1 2/2017
36
Combustion sources and
ventilation air contaminants
Contaminants are likely to be found in these areas:
• Auto body shops
• New construction
• Metal manufacturing plants
• Swimming pools
• Refrigeration repair shops
• Garages with workshops
• Furniture refinishing shops
• Plastic manufacturing plants
• Hobby rooms and remodelling areas
• Dry cleaners and laundromats
• Photo processing companies
• Beauty salons
Contaminants found in various products:
• Paint and varnish removers
• Chlorinated cleaners and waxes
• Glues and cements
• Swimming pool chemicals containing chlorine
• Refrigerant leaks
• Water softener salt containing sodium chloride
• Cleaning products such as chlorine-based bleaches,
detergents and cleaning solvents
• Spray cans containing chlorofluorocarbons
• Muriatic and hydrochloric acid
• Calcium chloride utilized in thawing
• Permanent wave solutions
• Adhesives utilized for building products and other
similar items
• Fabric softeners used in clothing dryers
DANGER
Follow the instructions in this manual for piping
the combustion and ventilation air for the MCA
Pro boiler.
Each boiler must have its own vent. Never
common vent with any other appliance as
outlined on page 43.
Thoroughly inspect the completed air and vent piping
to verify that all are airtight and in compliance with
all the requirements of applicable codes.
A failure to install and provide a properly installed air
and vent system will result in death, serious injury or
substantial product/property damage.
DANGER
All installations must be in compliance with the
National Fuel Gas Code ANSI Z223.1 for installations
in the US, and B149.1 0r B149.2 for installations in
Canada.
DANGER
Only use the materials listed in this manual for the
air pipe, vent pipe and fittings. If this information is
not followed exactly, it could result in death, serious
injury or substantial product/property damage.
WARNING
If a masonry chimney is to be used, it can only be
used as a pipe chase for air and vent pipes.
The installation instructions in this manual must be
followed for the air and vent piping and all joints
must be sealed. The MCA Pro boiler must be the only
appliance using the chimney and no other appliance
or fireplace can be connected to the chimney.
The air and vent piping must be in compliance with
the instructions in this manual and the chimney must
be straight with no elbows.
There must be a sealed access opening so that the
interior of the chimney can be inspected.
An annual inspection must be performed to verify the
condition of the chimney and the liner.
If this information is not followed exactly, it could
result in death, serious injury or substantial product/
property damage.
Piping for combustion air
1. Combustion air must be piped to the boiler from
the outside as per the instructions in this manual
and also in compliance with all national and local
codes having jurisdiction. Refer to the section
regarding combustion sources and ventilation air
contaminants on page 8 to ensure that the air
intake pipe will not be drawing in contaminated air.
2. Each boiler must have its own combustion air
piping. The air piping always has to terminate on
the same side or roof of the building as the vent.
Vent piping
1. The flue gases from the boiler must be piped from
the boiler to the outside as per the instructions in
this manual and also in compliance with all national
and local codes having jurisdiction. The termination
of the vent pipe must be either sidewall or through
the roof and positioned with the correct distance
and separation from the air termination. Refer to
the sidewall termination diagram and corresponding
instructions on page 46 or 47 or 48.
2. Do not common vent the MCA Pro boiler. Each
boiler must have a separate vent.
Air and vent piping materials
1. Refer to the table on page 34 and 39
for the
approved air and vent piping materials.
4. Installation
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