Swegon GOLD SD Description page 7

GOLD
Description of the Air Handling Unit
Mechanical Design
Coil heat exchanger
The coil heat exchanger in the one-piece units, GOLD
CX, sizes 035-080, are supplied complete from the fac-
tory; including mounted pipework package with all the
necessary components. The system is normally fi lled with
liquid, vented, adjusted and performance-tested prior
to delivery, but can also be ordered in unfi lled condition
e.g. for housing improvement projects or if the applica-
tion requires fi lling with another mixture instead of 30 %
ethylene glycol. On the size 100/120 GOLD CX one-piece
unit, the pipework package (accessory) including separate
control unit are supplied in unmounted condition.
Coil heat exchangers and pipework packages are available
as unmounted accessories for the separate size 004-120
supply air and extract air handling units (SD) A separate
control unit for the coil heat exchanger is always included
in the supply.
The pipework package's valve variably regulates the coil
heat exchanger's effi ciency on heat recovery and the
circulation pump is demand-controlled.
In cold weather, and if the extract air is humid, there is
risk of frosting in coil heat exchangers. The GOLD CX/SD
is equipped with an extremely effective anti-frost protec-
tion that measures the temperature of the liquid in the
extract air coil and also the humidity in the extract air.
Taking the humidity into consideration, the IQlogic control
system calculates the lowest permissible liquid tempera-
ture without risk of frosting inside the coil. The valve in
the pipework package is then controlled to prevent the
temperature from dropping below this limit.
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20190329 We reserve the right to alter specifi cations.