Airwell HRW 07, Руководство по установке и обслуживанию

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8
DUCTING AND NOISE LEVEL REDUCTION
Water circuit heat pumps are usually installed in conjunction with an air blowing duct. A return air duct may also
be required. All ductwork shall be compliant with best air conditioning engineering practices.
The air blowing duct system normally consists of a flexible connector mounted on the unit, a bridging section to
link to the size of the main duct, a short section of straight duct, an elbow without a damper and a main duct with
spurs equipped with distribution grilles as illustrated in the drawing below. The sum total of the bridging section
angles must not be higher than 30°, otherwise there will be significant performance losses.
Do not connect the main duct directly to the unit without a bridging section to reduce the duct size to that of the
unit’s connection collar. In the event of using metal ducts, only the sides of the elbow section and all the spur duct
sections should be covered with fibreglass sound insulation for reducing the noise level. Fibreglass duct panels are
more sound absorbent and may enable the flexible canvas connection to be eliminated.
The duct network must be laid out to avoid any rectilinear runs betweens the heat pump outlet and the air distribution
outlets.
The return air intake ducts can be connected to a grille/filter located at the base of a wall, then directed via hollow
partitions towards a ceiling mounted plenum or via ceiling mounted grilles. The ceiling grilles must not be located
directly below the air conditioning unit.
The return air intake duct can be connected directly to the standard filter bracket. (Lateral filter removal
advisable).
Do not drill panel screws directly into the unit’s casing for connecting the blowing and return air intake ducts,
especially on the air return side, as there is a risk of damaging the condensate recovery tray and the battery.
Recommended layout diagram for installation
with several air distribution outlets
Internal cladding on both sides with
glass fibre sound insulation
Adapter part
Alignment elbow
Main duct
Canvas
connection
Heat pump
Spur with internal glass fibre
sound insulation cladding
Air distributor:
60 x 60 cm (example)