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- Includes both variable orifice valve and fixed orifice tube systems
- Five (5) strategically located sight glasses
- Orifice tube positioned in transparent tubing to see change of refrigerant state
- Strategically positioned pressure gauges
- Fault insertion includes blocked accumulator, blocked orifice tube, blocked expansion valve, hi-pressure fault and faulty compressor
- Condenser and evaporator with variable fan speeds
- Service valves
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