Fantech MUAS 1600, Руководство по установке

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Application
The Fantech Exhaust Makeup Air System is a low voltage controlled
assembly of components which provides the automatic supply of outdoor
air into a building. When controlled by the current sensing Fantech
Makeup Air Controller “FMAC”, the system is suitable as compensation
for single speed, multi-speed, and variable speed exhaust fans.
The FMAC initiates the makeup air system upon sensing the exhaust fan
motor current, and controls the supply of outside air into the building in
proportion to that being exhausted.
This system may be used to replace air being removed by a kitchen hood
exhaust fan or other continuously or intermittently operating powered
exhaust system. Mechanical replacement of exhaust air allows an
exhaust system to function more effectively, helps to maintain pressure
equilibrium between the building interior and the exterior, and allows
for management (quantity, cleaning, tempering and location) of the
introduction of outside air to the building’s interior space. An electric
heater (optional) may be included as a system component. The heater
is not intended to provide heating to the interior space, but rather to
temper the supply of cold outdoor air before it is delivered to the building.
Due to its component-based, field-assembled nature, the Fantech Makeup
Air System offers flexibility as to where and how it can be installed
into a building. The installation location should be suitable for periodic
inspection and maintenance. It is not required that the individual system
components be installed in a linear (straight line) arrangement. System
components may be connected by duct work (by others) to permit
lengths and elbows for accommodating the physical space available for
installation. It is important to adhere to all instructions included with
each system component for proper installation, however, keeping service
clearances and straight duct lengths upstream and downstream of
components as required.
The air discharged from the Fantech Makeup Air System will almost
always be contained in duct work (by others), so that the supply of
makeup air may be routed to a suitable location for delivery to the interior
space.
The Fantech Makeup air system components and the system's duct work
must be insulated to prevent the formation of condensation.
Fantech recommends that makeup air be ducted to the space from where
the compensated exhaust is being removed. For example, makeup air
used to compensate a kitchen exhaust hood should be delivered directly
to the kitchen space. For this same example, it is advisable that the air
be delivered to the kitchen in such a way as to not disturb the exhaust
air pattern at the hood. In general, this can be accomplished by locating
the makeup air supply grille at least a few feet away from the footprint of
the kitchen hood, and ensuring that no streams of makeup air supply are
directed toward the area between the range top and the hood. Depending
on the makeup air flow rate, grilles might be suitably located above
kitchen cabinets, behind refrigerators, or simply at a convenient location
on a wall or the ceiling.
Depending upon the version of the building code that governs the
installation, there are potentially many code-compliant methods of
introducing the makeup air into the building.
Realizing this, Fantech deems it unacceptable to use central HVAC system
equipment and duct work for treatment and conveyance of makeup air.
Reasons for this include:
• Furnace manufacturers often limit the temperature of air entering
the heat exchanger to no less than 50-55ºF. The equipment warranty
could be voided if the limit is broken.
• Residential HVAC heating and cooling systems typically cycle on/
off with one or two stages of capacity on a signal from the space
thermostat. To put it another way, the central HVAC system is
intended to maintain a condition in the living space, and it only
operates when the living space condition becomes uncomfortable.
Since makeup air comes directly from outdoors, it is often quite
uncomfortable. The uncomfortable makeup air would be conditioned
only when the space thermostat is calling for action.
• The temperature difference between the indoor condition and the
outdoor condition can at times be significant. Cold makeup air
could cause the formation of condensation on the exterior of poorly
insulated duct work and equipment. Very humid makeup air could
result in condensation on the interior of poorly insulated duct work
and equipment.