Operating manual- SAB 355 (including ATEX)
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Cooling water system
Warning!
The recirculation water system may contain chemicals or biological contaminants, including le-
gionella, which can be harmful if inhaled or ingested. Water systems should only be operated with
an effective biological treatment programme.
4.3
Safety during maintenance and service
•
Personnel must be competent according to national safety rules and regulations and per-
form the maintenance work according to EN 378.
•
Read chapter
before opening the compressor and other parts of the
refrigeration plant.
•
It is recommended to remove all main fuses. Switch off all electric components on the
compressor/unit before starting the dismantling/servicing process and lock the main
switch.
•
Make sure that the motor cannot start up inadvertently.
•
Make sure that there is no over-pressure and no refrigerant in the part to be dismantled.
Close all necessary stop valves.
•
Use the prescribed tools, and check that they are properly maintained and in good work-
ing condition. In explosion-proof areas, use tools suited for this specific purpose.
•
Use only Johnson Controls Denmark original spare parts; other parts may impair the
safety of the compressor/unit.
•
When performing maintenance, the main switch must be locked.
•
Use gloves and protective goggles, and make sure to have a gas mask close at hand. Also
use electrical protection equipment and tools suited for electrical operation purposes.
ATEX
:
•
All parts should be electrically conductive to avoid sparking when static electricity builds
up.
•
Materials should only contain a limited percentage of light metals.
•
Original parts supplied by Johnson Controls Denmark must not be replaced by unspecified
parts that are not ATEX approved.
Warning!
On ATEX-executions, the limits in
must always be respected.
Temp. class
Max. surface
temp.
Max. temperature of oil to
shaft seal
Min. ignition temperature
of oil
T1
450°C
380°C
500°C
T2
300°C
230°C
350°C
T3
200°C
130°C
250°C
T4
135°C
65°C
185°C
T5
100°C
30°C
150°C
T6
85°C
15°C
135°C
Table 4: Temperature classes - screw compressors
