65
SKOPE TME ActiveCore
Replacement Procedures
Service Manual
Frost Test
Short of Refrigerant
SKOPE recommend leak detection using high pressure dry nitrogen with
utilization of pressure testing and soap bubbles. Ensure all refrigerant is
reclaimed from the system prior to the introduction of nitrogen. Do not mix
refrigerant and nitrogen for the purpose of leak detection.
Capillary Restriction
After reclaiming refrigerant attempt to clear restriction with dry nitrogen. If it
cannot be cleared then it is necessary to replace suction assembly (which
includes the capillary).
Compressor Pumping Fault
For suspected compressor fault - listen to compressor for internal gas
bypass. Fit suction and discharge line piercing valves to prove pumping
fault. After reclaiming refrigerant, perform compressor pump down test:
Remove system drier and braze closed capillary entry. The compressor
should then pump down to -100kPa and, after being switched off, maintain
this vacuum for 5 minutes.
General
• During a refrigerant service always replace filter / dryer. For a refrigerant
leak fit a solid core filter / dryer.
• Never leave the system open to atmosphere. If extended service time is
required then isolate and braze closed pipes to compressor.
1. Disconnect evaporator fan motor and remove the control probe from the
evaporator box. Run the refrigeration unit for 8 minutes. Check the test
results guide below.
Frost Test Results Guide
Possible faults with evaporator fan off, control probe out and 8 minute run time.
Temp.
Compressor
Suction Pipe
Evaporator
Frozen
Overcharge*
OK
OK
Cold and sweaty
Overcharge*
OK
SOG / Blockage*
Cool
OK
OK
SOG / Blockage*
Warm
OK
SOG / Blockage*
SOG / Blockage*
* Fit line piercing valves. SOG = Short of Gas
2. If Quick Touch and Frost Test prove OK, then investigate external influences.
If possible allow chiller to continue to operate and recover temperature.
3. If it is then necessary to fit Line tap valves and fit gauges ensure no
refrigerant ventilation to atmosphere and that all refrigerant is reclaimed and
correctly disposed.
4. At completion of Service Repair braze closed process tubes. Ensure process
tubes are left at least 100mm in length. Line tap valves must be removed.
Summary of Contents for ActiveCore SKT series
Page 1: ...TME SKT ActiveCore SKOPE Top Mount Vertical Chiller Service Manual MAN11097 Rev 4 2 May 2019 ...
Page 32: ...32 Spare Parts Service Manual SKOPE TME ActiveCore Glass Door Assembly 1 2 3 3 4 5 6 7 8 9 ...
Page 34: ...34 Spare Parts Service Manual SKOPE TME ActiveCore Solid Door Assembly 2 3 4 7 8 2 6 5 1 ...
