GEA FK40/390 K Maintenance Manual page 53

12 I Assembly of compressor
Checking the compressor
Working course
1. Evacuation / leak check of compressor
Connect the discharge and suction sides of the compressor to a vacuum pump
Evacuate the compressor from both sides; vacuum < 1.5 mbar. Check increase in pressure
In case there is an increase in pressure, check the compressor for leaks and evacuate again
Fill in the stipulated amount of oil (2.0 liters)
2. Carrying out the function test
Install the compressor in the system
Carry out a leak test with refrigerant
Make a test run. During this, check the oil level, the leak-tightness of the compressor, the running noise, pressure, temperatures and
the functioning of additional devices such as the capacity regulation
Remark: If the compressor is going to remain in the warehouse, charge it with nitrogen (at about 3 bar pressure) for protection.
ATTENTION Take the reminders for commissioning in the assembly instruction for FK40 into account!
Torques for screwed connections
General connections with flat seal in fibre or metal design
Screw size
M8
M10
Special connections
Designation
Shaft seal cover
Connecting rod screws
Oil drain plug
Oil intake plug
Sight glass
Flange connection
Soldering gland-shut-off valves
Screw plugs
Plug
Electromagnetic coupling
Decompression valve
1)
= Screw with aluminium sealing ring
Tightening torque
34 Nm
60 Nm
1 1/8"-18 NPTF
Note: Tighten the screws cross-wise in at least two stages
(tightening torque 50 / 100%) .
Screw size
M8
M6
M22x1.5
1)
1/4" NPTF
M10
1/8" NPTF
M12
M24
Tightening torque
34 Nm
15 Nm
100 Nm
25 Nm
25 Nm
60 Nm
25 Nm
85 Nm
100 Nm
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