AM, EM, AQ, BA, ASW - IOM
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Warning:
Please keep in mind that not respecting the minimum room volume can in the case of coolant
leakage result in injury or even death. Always respect actual national directives regarding
installation of cooling equipment (for EU EN378).
Underground unventilated rooms are extra hazardous because the coolant always stays near
the ground. Try to avoid such applications and use only as the last solution, which requires
special operating mode and forced ventilation of the space. In such cases we recommend
installing a remote terminal (PGD display) in a safe place.
1.4 Positioning of the Outdoor Unit
The air/water heat pumps are equipped also with an outer unit. These are the AirMaster and
EasyMaster types.The units are designed for outside installation. They must be equipped with
additional electric protection, more info in the “Electric installation” chapter.
1.4.1 Positioning, with Regard to Air Flow and the Condensate Drain
The units must be installed in an environment with free air flow, with the suctioning parts at least
300 mm from a building wall. Do not install the outer unit underground or in partly or completely
enclosed spaces, except in the case of the targeted use of waste heat. Under the unit must be
installed a condensate and melted water drain, with a sufficient height reserve for frosty periods,
when percolation is problematic.
1.4.2 Positioning, with regard to noise
When selecting the place of installation, you must observe the applicable limits for protected
rooms inside buildings and with regard to the environment. The usual acoustic pressure level
limit at the boundary of the property (land, building) is 50 dBA during the day (6:00 a.m. to 10:00
p.m.) and 40 dBA at night (10:00 p.m. to 6:00 a.m.). The noise levels of outdoor units are
specified in the catalogue sheets as the levels of Sound Power in dBA. There are various
methods of estimating the acoustic pressure level in a particular position, with regard to the
source of noise. In practice, the use of the ARI275-97 standard has proven to be suitable. It is a
practical evaluation that allows you to estimate the resulting noise level quite quickly. In making
the estimate, it is advisable to draw the situation on a plan. You can estimate the noise level as
follows:
Noise source position factor:
Free space without reflecting walls U=0
One reflecting wall:
d<3m, FU = +3dBA
