Pipe Connections - Bitzer ORBIT 6 GSD60120 Instructions De Service

NOTICE
!
!
Potential chemical reactions due to air penetra-
tion!
Avoid prolonged air penetration into the com-
pressor!
4.3.1

Pipe connections

NOTICE
!
!
Do not overheat brazed connections!
Maximum brazing temperature 700°C!
The pressure and suction line connections are either
copper-plated or galvanized. The brazing material for
connecting dissimilar metals should correspond to the
BAg series (minimum silver content of 35%).
ORBIT 6
• Direct brazed joints
• Connection of inch and metric pipes is possible
• A Rotalock adapter for brazing in the suction and
discharge connection is available.
ORBIT 8 (version B)
• Direct brazed joints
• Connect only inch pipes
ORBIT 8 (version R)
• Screw neck for connecting pipe adapters or shut-off
valves in Rotalock version
• Connection to pipe adapters only possible with inch
pipes
• Tightening torques for Rotalock connections:
– Pressure line: 180-190 Nm
– Suction line: 150-160 Nm
– Oil equalisation line: 150-160 Nm
– Sight glass GSD6: 55-60 Nm, GSD8: 120-135 Nm
NOTICE
!
!
Risk of damage to the sight glass.
Tighten the sight glass only using the hexagon
socket screw spanner (do not use a spanner)!
Tandem
To increase the corrosion protection, it is recommen-
ded to coat the socket for the oil equalisation line (Posi-
tion 5).
ESB-130-7
Pipelines
Use only pipelines and system components which are
• clean and dry inside (free from slag, swarf, rust and
phosphate coatings)
• delivered with an air-tight seal.
Design pipelines in such a way that
• the compressor is protected from flooding with oil or
liquid refrigerant during standstill
• sufficient refrigerant injection into the evaporators is
guaranteed
• higher pressure losses are avoided
• accumulation of excessive quantities of oil in a part
of the system is not possible
• oil return at minimum load and at very low com-
pressor speed during VSD operation is guaranteed
• the compressor is permanently protected against
loss of oil
• the compressor is permanently protected against
penetration of liquid refrigerant or oil slugs
• the entire system remains clean and dry
Mounting the suction gas and discharge gas lines
• Suction and discharge lines must be connected
stress-free.
• Lead the discharge line downward
NOTICE
!
!
For systems with rather long pipelines or for
brazing operations without protective gas:
Install the suction-side cleaning filter (mesh size
< 25 μm).
NOTICE
!
!
Risk of compressor damage!
Generously sized filter dryers should be used to
ensure a high degree of dehydration and to
maintain the chemical stability of the circuit.
Make sure to choose a suitable quality (molecu-
lar sieves with specially adapted pore sizes).
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