Octagon 4C Models | Heatcraft Refrigeration Products CC-CUBZTB

Bitzer Compressors

Features and Benefits

Octagon® 4C Models

Bitzer Octagon 4C Models are rated from 3 to 20 HP. This rugged, compact series utilizes wear resistant drive gear with PTFE coated bearings for especially low friction, aluminum pistons of optimized geometry, connecting rods with eccentric straps and generously dimensioned bearing surfaces. Bitzer’s centrifugal lubrication system eliminates the need for an oil pump and provides optimum oil supply to the compressor even under extreme operating conditions.

Centrifugal Lubrication

The centrifugal lubrication design employs a solid metal disc mounted to the crankshaft (see cut-away) that distributes oil into a reservoir at the end of the shaft. The oil then flows through the shaft to the bearing surfaces.

Bitzer offers an optional Optical Oil Sensor (See OLC-K1 photo below) that mounts to the outer cover of the compressor and monitors oil level by means of an infrared light.

OLC-K1 Operating Principle

The OLC-K1 sensing device shines an infrared light into the oil reservoir. If oil is present, the light is absorbed and the compressor runs normally. If no oil is present, the light reflects on the sensor, and the compressor shuts off.

Bitzer 4B & 6B Models

Bitzer 4B through 6B Models are rated from 13 to 50 HP. This series features surface hardened crank shafts, low friction bearings, aluminum pistons, hard chrome plated piston rings and special wrist pin bearings. The 4B & 6B models have a sealed main bearing and generously sized oil pump. Our patented oil return system ensures complete lubrication while reducing oil circulation into the system. Efficient capacity control is provided by unloader banks that can significantly reduce energy consumption.