Refrigeration Maintenance 10-10
REFRIGERANT LEAKS
Use soap bubbles or a Halogen leak detector with a minimal sensitivity of 5g/year(e.g. electronic detector) to leak test the
refrigeration system. Inspect for signs of oil leakage, which is the first sign of a leak in the refrigeration system.
NOTE: It is normal for compressor shaft seals to have a slightly oily film.
EVACUATING AND CHARGING SMART REEFER MULTI-TEMP SYSTEMS
Set-up Unit
The Multi-Temp microprocessor must be placed in the Evacuation Test to evacuate and charge the unit. When the microprocessor
is in the Evacuation Test it opens all the normally closed solenoid valves in the refrigeration system. This allows the refrigeration
system to be evacuated properly. Refer to the appropriate Diagnostic Manual for complete information about the microprocessor.
SYSTEM EVACUATION
NOTE: Use the Service Test mode to operate units with a TG-VI, µP-IV, µP-V, µP-VI, SR-2 or SR-3 controller. See the
appropriate Controller Operation and Diagnosis manual for instructions.
Evacuation is Important and Critical to System Performance
Testing and system analysis shows that refrigeration systems, which contain non-condensables such as nitrogen and/or air, can
be overcharged with refrigerant when charged using the sight glass method. An overcharge of refrigerant will cause compressor
damage.
Therefore, Thermo King recommends that all major repairs to the refrigeration system include the removal and reclamation
(cleaning) of the refrigerant, followed by a thorough evacuation using the proper tools and procedures. A major repair is any
repair that requires soldering, replacement of a major system component or leaves open a portion of the system to the atmosphere
for more than 30 minutes.
To Next Page
Loading...
Need help?
General
