10MorrHeat - Most Heat In The Industry
SYSTEM DESIGN CONSIDERATIONS
Chimney
For proper operation of the MHB boiler, all
products of combustion must be safely vented
to the outdoors, while ensuring that ue
gases do not cool prematurely. It is critical
that the chimney system is properly designed
to handle the ue gas temperatures which the
MHB boiler produces.
Flue gases which cool too quickly and produce
condensation lead to damages if the chimney
diameter is too large and the chimney system
is not well insulated. If a calculated chimney
diameter lies between two values, the larger
diameter should be selected.
Intermediate section
The intermediate (vertical and horizontal)
section of venting between the boiler vent pipe
collar and the chimney must be of the identical
diameter as the vent connection of the boiler.
Use the shortest possible path between the
boiler and the chimney. A maximum of two
elbows may be installed in the intermediate
section. Avoid the use of two level 90 degree
elbows. Intermediate section must be sealed
pressure tight at the boiler vent pip collar and
at the chimney connection. Ensure any test
port for combustion values is sealed as well.
The chimney connection lenght between the
boiler vent pipe collar and the chimney may
be installed with insulation. We recommend
consulting a reputable chimney installer for
advice in project-specic circumstances.
Barometric damper must be used!
Note: Direct Vent exhaust system operates under a
positive pressure developed by the burner. Make
sure all vent connections and observation ports
on the boiler are sealed airtight, by tightening
screws and using high-temperature silicone
sealant if necessary.
The vent components must be supplied
without any alteration except for the length
of the ex pipe which can be out to the
desired length.
Warranty
Our warranty does not cover damages
resulting for the following:
• installation or service by unqualied and
not licensed personnel
• corrosion caused by ue gas condensation
due to low boiler water and/or return
water temperatures
• operation with contaminated ll and
supplementary feed water
For detailed warranty information, please
read warranty sheet supplied with the
product.
Combustion air supply
The boiler must not be located in areas or
rooms where chemicals containing chlorine,
bromine, uorine, or other corrosive
chemicals are stored. Examples include
refrigerants, bleach, paint, paint thinner,
hair spray, cleaning solvents, water softener
salt, etc. The combustion air must not be
contaminated with the above mentioned, or
other aggressive or corrosive chemicals.
Boilers should never be installed in areas
where excessive dust, high humidity, or risk
of frost exist. Ensure adequate ventilation
and supply of fresh combustion air.
