Munters ML180, User Manual

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ML180-MLT350 Dehumidifiers
10
2 Installation
190TGB-1034-A
2.8 Ducting
2.8.1 General recommendations
The connections for process and reactivation air are designed in
accordance with the recommendations in ISO 7807. The rectangular
duct connections contain tapped inserts for M8 bolt fixings.
CAUTION! The dehumidifier has been designed to operate at specific process
airflows (corresponding to the fan sizes installed) and must not be directly
connected to air-conditioning systems.
• When installing ductwork between the dehumidifier and the inlet
and outlet connections, the following recommendations should be
observed:
• The length of ductwork should be kept as short as possible to
minimise static air pressure losses.
• To maintain performance, all rigid process or reactivation air
ductwork joints must be air and vapour tight.
• The process air ductwork should be insulated to prevent
condensation from developing on the outside of the duct whenever
the temperature of the air within the duct falls below the dewpoint
of the ambient air through which the ductwork is routed.
• The ducting must always be insulated when there is a risk of
freezing.
• The wet air leaving the dehumidifier will, due to high moisture
content, condense on the inside duct walls. This must be avoided by
insulating the ducts.
• Horizontal duct-runs should be installed sloping downwards (away
from the dehumidifier) to allow for condensate drainage. On the
wet air outlet ducting, suitable condensate drains should be installed
at low points in the ductwork. Refer to
figure 2-3, Wet air outlet design .
• Ensure that access for operation and servicing is not restricted when
designing and installing ducting. For details refer to section 6.3,
Dimensions and service space .
• To reduce noise and/or vibration being transmitted along rigid
ductwork, good quality, airtight flexible connections can be fitted.
• Ducts mounted directly onto the dehumidifier should be adequately
supported to minimise the load and stress due to the duct weight
and movement.
• Dampers for balancing the airflows must be installed in the dry air
outlet and reactivation air inlet ducts. The correct airflows are
essential for maintaining the operating efficiency of the unit. For
airflow adjustment details,
see section 2.15, Airflow Check and
Adjustment .