22
/11.2015/
G17D
max.
10
m
EN
Install a remote condensing unit designed for R410A refrigerant. For correct operation of the whole
refrigerant circuit, the remote condenser must be provided with variable speed fan, to adapt con-
densing pressure to variable outdoor conditions.
A/C units with speed controlled compressor (AS version)
The units contain an oil separator which is installed at the hot gas side of the compressor and serves to recuperate
oil in all operating states. The separated oil is injected on the suction side of the compressor.
For the hot gas line and the liquid line each a non return valve is supplied loose with the A/C unit. For the liquid line
we recommend to install the non return valve near the condenser, this avoids the return flow of refrigerant in to the
condenser and a possible low pressure error at the unit start.
For the hot gas line we recommend to install the non return valve as close as possible to the A/C unit. The non return
valve avoids the return flow of liquid refrigerant from the condenser when the A/C unit is not in operation.
Measures to take with hot gas pipes if the condenser is positioned higher than the A/C unit
• Ascending pipes must have oil traps every 3 m (see drawing).
• Install an oil trap at the end of horizontal gas pipes whenever the following pipe is an ascending pipe (see dra-
wing).
Laying pipes when the condenser is located higher
than the A/C unit.
Oil trap
appro
x.
3 m
Oil charge
The A/C unit is prefilled with 0.6 l oil. Further addition of oil damages the compressor and may
invalidate guarantee coverage for the product.
non return valve
(supplied loose)
non return
valve (sup-
plied loose)
