48
/04.2016/
G35
PZH
TCE
PC TIC
PC
TIC
EN
A/C units with speed controlled compressor
Compressor
Condenser
Non-return valve
(supplied loose)
Receiver
A/C unit
external installation
Open stop
valves !
Non-return valve
(supplied loose)
Oil separator
- Because R410A is a blend and scrolls have discharge check valves, systems should be liquid-charged on both the
high and low sides simultaneously to ensure a positive refrigerant pressure is present in the compressor before
it runs. The majority of the charge should be placed in the high side of the system to prevent bearing washout
during first-time start.
- The standing refrigerant bottle is connected to the suction side via a pressure gauge station. The weight is noted
shortly before filling. The specified amount of refrigerant is now added when the system is operating. During
filling the pressure in the refrigerant bottle will adjust to that of the system. Filling is then no longer necessary.
This can be seen by the icing up of the bottle or by checking the pressure gauge. The bottle valve must then be
closed until a pressure increase has taken place which is above the suction pressure of the system. This pro-
cess can be accelerated if the bottle is wrapped in hot moist towels or it is placed in a water bath at a maximum
temperature of 50°C.
Never heat up the refrigerant bottle with a naked flame as there is a risk of explosion.
