Swegon GOLD SD Description page 6

GOLD
Description of the Air Handling Unit
Mechanical Design
Heat exchanger
Rotary heat exchanger
RECOnomic/RECOsorptic rotary heat exchanger with a
temperature effi ciency of up to 85%. The need for heat
is dealt with by automatically and variably regulating the
speed of the rotor.
The rotary heat exchanger effectively recovers cooling
energy as well.
It is available in a sorption version (RECOsorptic) for mois-
Purging sector
ture recovery, which reduces operating and investment
costs for cooling and improves indoor comfort levels in
the winter, as well as in an epoxy-treated version.
Purging sector, commissioning plates and pressure meas-
urement tappings as standard, ensure that the extract air
will not be carried over to the supply air.
The RECOnomic/RECOsorptic heat exchanger is patented.
Counterfl ow heat exchanger
The counterfl ow heat exchanger is as standard equipped
with centre-mounted bypass dampers and two heat
exchanger dampers for variable and automatic regulation
of the heat exchanger's effi ciency on heat recovery.
The counterfl ow heat exchanger is available in two ver-
sions: Normal effi ciency (MPE, Maximum Pressure Effi -
ciency) and high effi ciency (MTE, Maximum Temperature
Effi ciency) respectively. In the MPE version, the focus is on
low pressure drop across the heat exchanger. In the MTE
version, priority is given to high temperature effi ciency.
Internal leakage between air streams conforms to the
provisions of Ductwork leakage class L2.
In cold weather, and when the extract air is humid, there
is risk of frosting inside the plate heat exchanger. The
GOLD PX is therefore equipped with anti-frost protection.
RECOfrost anti-frost protection
The pressure drop across the heat exchanger, extract air
temperature, moisture content in the extract air and out-
door air temperature are measured.
With consideration given to the pressure drop across the
heat exchanger, the extract air temperature, the moisture
content in the extract air and the outdoor air tempera-
ture, the control system individually regulates dampers
for bypass and the heat exchanger for section-by-section
defrosting without the formation of frost. This enables
high annual effi ciency, smaller air heaters and pressure-
drop-optimized operation during the spring and autumn.
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We reserve the right to alter specifi cations. 20190329