Table of Contents
Advertisement
Maintenance
Maintenance work
10.4.5
Tightening screw fastenings
Screw connections of components may become loose by vibration and move-
ments. Screw connections must therefore be checked periodically for tight seat-
ing, and retightened if necessary.
Tightening screw connections must be done only in accordance with the maxi-
mum tightening torques.
Unless otherwise stated on labels attached to the products, the tightening torque
must be chosen depending on the size and strength of the screw connection.
10.4.6
Coupling maintenance
1.
2.
3.
4.
5.
6.
10.4.7
Checking the function of check valves
In order for a check valve to be effective it is important to perform function checks
at regular intervals.
A control takes place by checking the noise behaviour of the valves during opera-
tion. An error function on the suction side appears due to lengthy turning back of
the compressor after switching off the product. An error function on the pressure
side leads to an increase of the standstill pressure in the product to the pressure
level of the pressure side of the system.
10.4.8
Searching for leaks on the refrigerant side / leak test
The absence of leaks is a precondition for perfect functioning of the product.
Leaking parts or connecting elements will lead to the loss of refrigerant and oil as
well as the penetration of air and moisture into the low pressure side. The site of
the leak must therefore be located and remedied if there is:
•
•
•
98
Notice
Oil removed from the compressor must not be re-used. Use only fresh oil
from closed tanks! You must rule out mixing different types of oil.
► For permissible types of oil, please refer to the technical specifications.
Decommissioning the plant
Secure the electric motor against accidentally being switched on.
Visually inspect the disk packs.
Check the tightening torques of the fit screws.
Check the alignment condition of the electric motor and, if necessary, correct
in accordance with the steel disc coupling documentation
Re-grease the coupling (if provided for in the maintenance instructions for the
coupling).
Loss of the inert gas filling (delivery state),
Loss of the entire refrigerant filling
or
resulting under-filling.
L_151511_2
19.12.2019
Advertisement
Table of Contents
