Lennox eNeRGy Series Installation, Operating And Maintenance page 44

REFRIGERANT CIRCUIT
Preheating of the crankcase heaters
It's important to avoid starting the compressors without preheating of the crankcase heaters.
WARNING: In case of extended shutdown of the unit (> 6 hours), it is mandatory to power on the unit 8 hours minimum before to
start the compressors equipped with crankcase heaters.
Vacuum
On each refrigerant circuit there are connection valves on the low pressure side and high pressure side.
WARNING: In case of vacuum, never connect the vacuum pump only tor Low Pressure connection valve. In this case there is a risk
of not vacuuming the complete circuit. In order to vacuum the circuit, it is necessary to connect the vacuum pump on both low
pressure and high pressure simultaneously
Low Pressure
High Pressure
EEV adjustments
EEV allows to control superheat in bi-flow operation (see climatic user manual).
Welding instructions
Electronic expansion valves are sensitive to dust – strainers must be used in case of replacing.
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eNeRGy-IOM-2020.12-EN 44