Morris DIM-20220 User manual
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Warning: The appliance should be stored in a well-ventilated room. The area of the room
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-——All operators or refrigeration circuit maintenance personnel should obtain a valid
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Prior to servicing with flammable refrigerants, a safety inspection must be performed to
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precautions should be observed before handling the system.
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combustible gases or vapors during operations is lowest
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Pre-operation and during operation should be monitored in the area using an appropriate
refrigerant monitor to ensure that the technicians are aware of the presence of potentially
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When performing heat-processing operations on the refrigeration system or related
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into the surrounding environment. It must be far away from the area where it is installed,
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If you replace electrical components, these electrical components should be installed in a
ccordance with the day-to-day and night-time operating regulations. Atall times, the
manufacturer's maintenance and repair guides should be followed. If in doubt, consult the
manufacturer's technical department.
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- The charge should be determined according to the size of the room containing the refrigerant containing
components;
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,IDQLQWHUUHIULJHUDWLRQUHIULJHUDWLRQF\FOHLVXVHGFKHFNWKHSUHVHQFHRIUHIULJHUDQWLQWKH secondary
circuit;
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- Refrigerating lines or electrical components should not be installed in environments that contain
possible housing contact elements ,unless the electrical components are made of
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The repair and maintenance of electrical components should include initial safety inspections and
component inspection procedures. If there is a defect that compromises safety, the appliance
power supply must bede-energized until the defect isproperly disposed of. If the defect cannot be
completely eliminated in the end, and must continue to operate, then
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and warn all relevant personnel.
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- No exposed electrical components and wiring during filling, recycling and cleaning of the system
- Continuity of grounding
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B.1 When repairing closed components, disconnect the power supply of the device before
opening the sealed cover. If there is power supply during the maintenance process,
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dangerous situations from occurring.
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maintenance methods affecting the degree of protection of the enclosure. Improper maintenance may
result in damage to the cables, excessive connection, improper installation
of the terminals, damage to the sealsand sealing. Cover installation error and other hazards
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Ensure that the sealing or sealing material does not lose its effect of preventing the entry of
flammable gases due to aging, and the replacement parts should comply with the
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operation
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If it cannot be ensured that the appliance does not exceed the limits of the allowable voltage and
current during use, nopermanent inductance or capacitive loadmust beused inthe circuit.
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environmental effects. This inspection should also consider the impact of aging or the continuous
vibration of the compressor and fan on the cable manufacturing. (,QVSHFWLRQRIćDPPDEOHUHIULJHUDQWV
,QVSHFWLRQUHIULJHUDQWOHDNDJHVKRXOGEHGRQHLQDQHQYLURQPHQWZKHUHWKHUHLVQRSRWHQWLDO source of
ignition and should not be detected using a halogen probe (or any other detector
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acceptable:
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range (max. 25%)
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prevent oxygen and refrigerant from reacting and corroding the copper pipeline
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When performing maintenance or other operations on the refrigeration circuit, routine
procedures should be followed, but the flammability of the refrigerant should also be
considered. Follow these procedures:
- Clear refrigerant
- Purge the line with inert gas
- Vacuum
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oxygen-free nitrogen to ensure safety. This process may need to be repeated several times. This
operation must not be performed with compressed air or oxygen.
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pressure under the vacuum state, and then the oxygen-free nitrogen is discharged to the
atmosphere. Finally, the system is evacuated to a vacuum, and the process is repeated until the
refrigerant in the system is completely removed. After the last charge of anaerobic nitrogen, the
gas is released to atmospheric pressure and the system can then be welded. Such as pipe welding
operations, the above operation is very necessary
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ventilated.
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different refrigerants will occur, and the piping for charging the refrigerant should be as short
as possible to reduce the residual amount of refrigerant therein
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- Must pay attention not to overcharge
The pressure test was performed with oxygen-free nitrogen before recharging the system.
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test should be conducted when leaving the area
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features and recommend the practice of safe recovery of refrigerants. To recycle the
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testing, ensure that you have the necessary power supply. D!)DPLOLDUZLWKWKHHTXLSPHQWDQGRSHUDWLRQ
b> Disconnect the power
c> Before proceeding with this procedure, ensure that:
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d> If possible, vacuum the cooling system
e> If the vacuum state is not reached, extraction should be performed from multiple places toextract the
refrigerant in each part of the system
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instructions
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The refrigerant in the system needs to beremoved during maintenance or scrap. Itis
recommended that the refrigerant be completely removed.
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WDQNVVKRXOGEHHYDFXDWHGDQGNHSWDWURRPWHPSHUDWXUHEHIRUHXVH
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FKHFNZKHWKHULWLVLQDJRRGFRQGLWLRQZKHWKHULWLVZHOOPDLQWDLQHGDQGDOOWKHHOHFWULFDO
FRPSRQHQWVDUHVHDOHGWRSUHYHQWWKHĆUHIURPOHDNLQJRQFHWKHUHIULJHUDQWOHDNV,ILQGRXEW consult the
manufacturer.
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instructions and returned tothe chiller manufacturer. Do not mix the refrigerant in the
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is evacuated to a suitable level to ensure that there is noresidual flammable refrigerant in the
lubricant. Evacuation isperformed before the compressor returns to the supplier. Only use electric
heating to heat the compressor housing to speed up this process. When the oil is discharged from the
system, safety should be ensured.
19
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