Maintenance Of The Switching Cabinet - GEA Grasso M-Series Operating Manual

Cleaning, maintenance, repair
Parameter to be
checked
Discharge temperature
Oil temperature
Oil pressure
Discharge pressure
Oil level in oil separa-
tor
Oil heater
Setting the safety devi-
ces
Capacity control
Number of operating
hours
82
Every 24
Weekly
to 72hrs
X
X
X
X
X
X
X
Monthly Remark
Minimum superheat must not be less than 15 K
for NH . For other refrigerants, the manufactur-
3
er's instructions must be noted.
Maximum discharge temperature 100°C, in indi-
vidual cases (e.g. heat pump applications) this
may be exceeded in agreement with the manu-
facturer.
See parameter list!
The viscosity must not be less than 7 cSt at
max. speed (rpm).
The oil pressure must be at least 0.5 bar above
the final discharge pressure. An oil pressure
fault may be caused by a clogged oil filter. Set-
ting and monitoring of the values in accordance
with the information in the parameter list.
See project value (parameter list). Determine
the superheat on the pressure side by compari-
son with the final discharge temperature.
See chapter "Oil level check". An oil level must
be visible in the sight glasses at all times. If the
oil level is below the minimum value, the oil
must be recharged.
When compressor is shut down, the heater
X must automatically start. Visual check, the
green LED indicates "Voltage ON".
X See set values in the parameter list.
Solenoid valves must switch audibly when the
capacity is adjusted. Check in operating mode
"1 (manual + manual)".
See maintenance checklist for maintenance
work to be carried out according to the number
of operating hours.
10.4.4.21
Terminal screws must be checked for tightness and,
if necessary, tightened at regular intervals (every
5,000 operating hours or at least once per year). The
GEA Refrigeration Germany GmbH | P_261511_1 | Generated 01.04.2015
Operating Manual | GEA Grasso M-Series
Screw Compressor Packages
Maintenance of the switching
cabinet