Bitzer KT-600-4 Manuel D'installation page 38

• Dimension of the header tube for 2 compressors:
– Central inlet with a diameter in accordance with its overall capacity
– Pipe sections connected to the compressors in the same way as the brazed connection of suction gas shut-
off valves
• Dimension of the header pipe for 3 and 4 compressors:
– Suction gas velocity in case of transverse flow in the header < 1.5 m/s
• Mount header exactly horizontally
Constructive design of pressure headers
• Transverse connection with outlet on one side, avoid 90° bends and use e.g. 45° bends ( see figure 8, page 39 )
• Arranged below the level of the discharge gas shut-off valves
• Pipe cross-section (same diameter throughout) ideally as large as the total cross-section of the individual pipes.
Alternatively: Dimensioning based on the max. flow velocity - for high-pressure refrigerants such as R744, a
max. flow velocity of 10 m/s should not be exceeded.
• Connecting lines from the shut-off valve to the header with downward slope, in order to avoid accumulation of oil
and / or refrigerant condensate on the high pressure side of shut-off compressors. Diameter in accordance with
the customary design criteria.
KT-600-4 // PDF Download 38