A
B
1
Fig. 37: Fresh air connection
1: Outdoor air intake
A: Outside
B: Inside
n
The fresh air content should not exceed 10% of
the nominal air flow rate for the unit. The fresh
air supply should be controlled by an additional
speed-regulated fan.
n
The air at the outdoor air intake should be
sucked in through a dust filter at a maximum
rate of 2.5 m/s to prevent the ingress of rain
water.
n
The fan should be connected to a separately
protected electrical supply that is to be pro-
vided by the customer.
1
Fig. 38: Fresh air inlet
1: Fresh air inlet
6.2 Connection of
refrigerant piping
The refrigerant piping is connected on the back
side of the units.
It may be necessary to fit a reducer or flared
adapter to the indoor unit. These fittings are
included with the indoor unit as an accessory kit.
Once installed, the connections should be insu-
lated to make them vapour diffusion proof.
NOTICE!
Use only tools which are approved for use in an
HVAC environment. (z. B.: bending pliers, pipe/
tubing cutters, de-burrers and flaring tools). Do
not cut refrigerant pipes with a saw.
NOTICE!
All work must be carried out in a way that pre-
vents dirt, particles, water etc. from entering,
refrigerant lines!
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