HHFLEX E DECEMBER 2020
HHFlex air handling units
systemair 13
Cooler
Heater
Electric heater
Run around coil system
The run around coil system is a system in which a
mixture of water and glycol circulates between two
elements. Run around coil systems are used when it is
necessarytocompletelyseparatetwoairows.Using
the run around coil system makes the air handling unit
ideally suited for situations in which hygiene is thé
design parameter. In addition, this system is extremely
exibleandthereforeeasytouseinvarioussituations.
Heating coils
The most common types of heaters are hot water,
electrical and steam heaters. The heater with hot water
can be placed in any air handling unit. The casing is
produced from galvanized or stainless steel and the
heat exchangers are available in Cu/Al, Cu/AlPP, Cu/Cu,
FeZn and stainless steel. The batteries are economically
selected,specicallyforthesituationwiththeprimary
goal to keep energy costs low.
Theheatercanbettedwithafrostprotection
thermostat. This protects every circuit individually
against freezing, which is ideal in combination with low
temperature systems. The electric heater is completely
integrated into the unit and can be positioned in
accordance with the factory standards. This heater
also has a wide range of capacities and switching
options.Electricheatersarettedwithasafetyscreen
andanoverheatandrethermostat.
Cooling coils
The majority of coolers used are based on chilled
water and direct expansion (DX). The DX cooler has
connections that are easily accessible. The section with
coolers can be expanded with plastic or galvanized
droplet eliminators. The droplet eliminator is easy
to remove, which makes the coil easy to clean and
extremely maintenance and user-friendly. The unit is
ttedwithastainlesssteelslopingcondensation
drain tray.