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8.2.2. Heating coil
Fin heat exchanger made of copper and aluminium is fitted. It is supplied with heating medium as
water or water with ethylene or propylene glycol. The heat exchanger is accessible from the unit’s
service side. While the heating medium connectors are provided at the opposite side, on back of
the casing. Such solution allows the exchanger to be accessed freely from the service side. Thanks to
this removal of the exchanger, e.g. for cleaning or periodical maintenance does not require removal
of this part of the system that is mounted directly by the unit. It is only necessary to empty the heat
exchanger and unscrew unions on the exchanger connections and push out the exchanger from the
casing onto the service side.
8.3. WATER HEATING COIL AND WATER OR FREON COOLING COIL SECTION
The section has been designed as air-supply type in single-deck configuration. The section comprises:
casing, fin water heating coil, fin water cooling coil or freon evaporation coil, droplet eliminator, tray.
8.3.1. Casing
Casing construction bases on the spacious frame made of aluminium profile. Wall, roof and
base planes are heat insulation panels made of 45 mm thick mineral. Inside the panel special
reinforcements are used thanks to which the whole structure is stiff and strong. At the service side
there is hinged inspection door closed using clamps with thumb screws. In order to ensure proper
tightness of the whole casing the panels are sealed with special adhesive, and inspection door is
provided with double gaskets.
To keep tightness between the connected sections, air supply inlets and outlets have insulation on
their circuits. Additionally, in corners of the casing at air supply inlet and outlet sides, steel section
connectors with oblong holes are fitted. When connecting sections, this solution enables to level any
slight unevenness in surface for setting the unit both vertically, and horizontally.
In order to ensure proper setting of the section on the ground, the casing, in all sizes, is equipped
with load-bearing feet.
8.3.2. Water heating coil
Heat exchanger made of copper and aluminium is fitted. It is supplied with heating medium as
water or water with ethylene or propylene glycol. The heat exchanger is accessible from the unit’s
service side. While the heating medium connectors are provided at the opposite side, on back of
the casing. Such solution allows the exchanger to be accessed freely from the service side. Thanks to
this removal of the exchanger, e.g. for cleaning or periodical maintenance does not require removal
of this part of the system that is mounted directly by the unit. It is only necessary to empty the heat
exchanger and unscrew unions on the exchanger connections and push out the exchanger from the
casing onto the service side.
8.3.3. Water cooling / freon evaporation coil
Heat exchanger made of copper and aluminium is fitted. It is supplied with chilled water with
ethylene or propylene glycol or, freon. Heat exchangers are accessible from the unit’s service side.
While the chilled water connectors are provided at the opposite side, on back of the casing. Such
solution allows the exchanger to be accessed freely from the service side. Thanks to this removal of
the exchanger, e.g. for cleaning or periodical maintenance does not require removal of this part of
the system that is mounted directly by the unit. It is only necessary to empty the heat exchanger and
unscrew unions on the exchanger connections and push out the exchanger from the casing onto
the service side.
