Marksa CSSW 50, Техническое уведомление

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Technical Notice V1.0 / 01.09 Page 91 / 100
Breakdowns 13
Chapter contents
This chapter contains instructions useful in the event of a breakdown of your refrigeration unit.
13.1 Warnings
We decline all responsibility for operations carried out on the unit by non-qualified personnel.
Before intending to repair the refrigeration circuit strictly speaking, first ensure that control system is wor-
king properly and is correctly configured.
If, even after checking and confirming the control settings of the temperature regulation system, the
breakdown persists, then it is necessary to check and possibly to repair the refrigeration unit.
Changing the settings of and making repairs to the refrigerated circuit are very delicate operations. With
this motive in mind, we do advise you to entrust such work to a qualified refrigeration engineer.
13.2 Checks
13.2.1 Pressure checks
It is highly recommended to entrust any intervention to a specialist refrigeration engineer.
B
EFORE ANY INTERVENTION ON THE UNIT
,
CUT OFF ITS POWER SUPPLY AT THE SOURCE
.
B
E CAREFUL WITH CERTAIN PARTS OF THE REFRIGERATED CIRCUIT WHICH CAN GET VERY HOT
(
IN PARTICULAR
THE BRASS PIPINGS
).
At present, HFC gases represent the best solution as regards the protection of the environment.
However, they must be handled with care and must be never released into the atmosphere, but
recovered back into a reservoir.
For this control, two manometers exclusively reserved for the use of HFC gases are necessary:
• 1 low-pressure (LP) manometer graduated from 1 to 10 bars.
• 1 high-pressure (HP) manometer graduated from 0 to +30 bars.
Each of these manometers needs to be equipped with a flexible pipe terminated with a 1/4 " flare cou-
pling.