Rev. 3 02-2021
72
MTEC.DXi.H/DXi.HF.GB-3 Use and Maintenance technical manual DXi.H/DXi.HF English
Emibyte DXi.H/DXi.HF
Direct expansion close control
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If more restrictive norms not existing, on the unit a pressure test should be performed generally every 3 months, if during the test there is a
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leak using suitable instruments, repair it and perform again the pressure test in accordance with national legislation in force.
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-
formity with the law and regulations in force.
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If more restrictive norms not existing, the safety high pressure switches has to be inspected at least every 12 months, to verify the operation,
the settings in case of manual restart switch and the correct installation.
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If more restrictive norms not existing, the external safety valves must be inspected at least every 6months to verify the operation. If a leak
is detected the valve must be replaced.
Anyway every 5 years of using must be inspected in order to verify the set pressure s readable (on the valve), the installation and the cha-
racteristics in order to guarantee the system safety in accordance with the regulations in force.
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It is necessary to verify at least monthly the unit sound emissions and that the piping is not subject to abnormal vibrations can cause a
breakage.
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1) Basing on the sensible material color in the indicator is possible to understand if the humidity inside the circuit is acceptable; normally
the indicator is light green if the humidity i slow, otherwise the color change into yellow (anyway follow the indication on the sight glass).
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circuit.
CASE
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A
X
X
X
B
X
X
X
C
X
X
D
X
X
A
Inspection after an intervention with possible effects on the mechanical strength or after use change or in case the machine has not being working
for more than two years. Replace all the components which are not suitable any more. Do not carry out checks at a higher pressure than the one
indicated in the project.
B
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leakage of refrigerant is detected, a leakage search must be carried out on the entire system.
C
Inspection after installation in a different position than the original one. Refer to point A when mechanical strength could have been affected by the
change.
D
Leak search, following a well-founded suspicion of refrigerant leakage. It is recommended examined the system for leakage, either directly (use
of leak detection systems) or indirectly (deduction of leakage based on analysis of operating parameters), focusing on the parts most prone to
leakage (e.g. joints).
