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Installation, Connection of Heat Exchangers
Connection of Individual Blocks
Figure 8 – Installation of the unit to the base frame
Figure 9 – Connection of the unit in the upper part
Connection of the upper part using the connecting kit
and the M 8 Allen head screw.
Figure 10 – Connection of the unit in the lower part
Connection of the unit in the lower part using the pressure
element and the M6x20 Allen screws.
CAKE Air-handling units
Rotary Heat Exchanger
A rotary heat exchanger is one of the most expensive components
in the air-handling assembly; poor and/or incorrect installation can
result in costly repairs. During improper handling, transport or if
the installation conditions are not met, the heat-exchanger rotor
can be misaligned or permanently damaged. To enable service or
cleaning of the rotor, it is necessary to ensure sufficient free space
in front of the unit so that the rotary heat exchanger can be fully
extended from the unit.
Media Connection, Condensate Drainage
and Air-handling Duct Connection
Connection of Heating and Cooling Media Feeds
The heating and cooling water feeds are connected to the outer
side of the air-handling unit. The internal interconnection is made
during production in the factory. External outlets are terminated
with external threaded connections. The heat exchangers are
counter-current connected to achieve maximum output.
The heat exchangers are not equipped with air-venting valves.
Therefore, the inlet and outlet line venting must be vented during
installation – at the highest points.
Connection of direct evaporators is carried out by routing the
piping into the air-handling unit through rubber grommets in the
casing and connecting it to the cooler necks. Direct evaporators
must be connected by a specialized contractor authorized to
install refrigerating equipment. The direct evaporators are filled
with nitrogen in the factory. The water heat exchanger connec-
Figure 11 – Connection of heat-exchangers (cap nuts)
tions must cause no mechanical stress. Forces arising from the
dilatation and weight of feeding pipes and fittings must not be
transferred to the air-handling unit.
The corresponding connection points are marked with labels
on the unit side panel (heating water inlet, heating water outlet,
coolant inlet, coolant outlet).
After connecting the water heat exchangers (heaters and coolers,
including mixing sets) to the distributing piping, it is necessary to
pressurize (flush with water) and vent the entire circuit, including
the heat exchanger. Then it is necessary to perform leak-tightness
checks of all pipe joints and of the exchanger itself (including
inspection of the unit interior with the water heat exchanger).
The manufacturer does not provide any guarantee covering
any damage resulting from liquid leakage from leaky joints or a
damaged exchanger, except the internal interconnection which
was carried out by the manufacturer.
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