Sperre HLF2/77, Instruction Manual

Instruction manual for compressor type HLF2/77 

Page 4 

INSTALLATION 

 
The compressor and el. motor are normally connected by a flanged connection piece, and not by the 
means of a separate baseplate. In this assembly it is not necessary to take any special measures to 
align the motor and compressor. 
If the compressor is delivered as an assembly with compressor and engine mounted on a common 
baseplate, it is very important to ensure that the alignment of the compressor and motor shafts are 
within the required limits. 
  

Alignment should be carried out as follows: 

 
1.  Use vernier callipers to check that the distance between the coupling halves is equal around the 

whole circumference. The distance between the coupling halves should be 33 ± 1 mm. The exact 
distance is not important, but it must be the same all around the coupling. 

2.  When angular alignment has been checked as described above, check for parallel displacement, 

using a dial gauge mounted on a magnetic base. Measure the parallel displacement around the 
circumference. Displacement must not exceed ± 0,05 mm. 

 
In order to ensure trouble-free operation it is important that the foundation is well stiffened and free 
from vibrations from other installed machinery. This applies to rigid mounting and flexible mounting 
alike. 
 
A well-dimensioned fresh air duct must be provided to the location where the compressor is installed. 
The mouth of the duct should be as close as practically possible to the suction side of the cooling fan. 

The ambient temperature should not exceed 45°C.

 
In principle the pipe from the compressor to the air reservoir should be arranged as shown in the 
installation diagram supplied with the compressor. A non-return valve of strong construction and little 
air resistance should be installed between oil and water separator and air receiver.   
 
If the compressor unit is installed with resilient mountings, a flexible hose must be installed in the 
compressed air pipe. An oil and water separator should be fitted at some distance from the 
compressor, and arranged so that the line slopes downwards from the compressor to the separator. It 
is recommended to provide the oil and water separator with both manual and automatic draining. 
Equipment for automatic draining is available as an optional extra. 
 
If the pipe from compressor to reservoir is longer than about 10 meters, the dimensions shown in the 
installation diagram supplied with compressor should be somewhat increased to ensure the lowest 
possible air resistance. 
 
Arrange the piping so that condensate cannot collect in pockets. 
 
All piping must be well clamped and free from vibration. 
  
 

CCG DOC NO. 346055