Emerson Copeland EazyCool ZXME020E Application Manuallines page 3

2.14 Pump-down – General ................................................................................................... 23
2.14.1 External pump-down – Without XCM25D integration (not available on ZXDE units)
............................................................................................................................ 23
2.14.2 Pump-down by the unit controller (not available on ZXDE units) ...................... 23
2.14.3 Pump-down with room thermostat (not available on ZXDE units) ..................... 24
2.14.4 Internal pump-down with temperature sensor (case temperature) .................... 25
2.15 Reset to factory settings – Emerson "Hot Key" ............................................................. 26
2.15.1 How to save factory settings or user settings .................................................... 26
2.15.2 Applicable hot key for ZX units with XCM25D controller .................................... 26
2.15.3 Location of the "Hot Key" plug connection on the XCM25D controller .............. 26
2.15.4 How to program a "Hot Key" from the controller (upload) .................................. 26
2.15.5 How to program a controller using an Emerson "Hot Key" (download) ............. 27
2.16 Troubleshooting – Alarm history .................................................................................... 27
2.17 Compressor motor protection ........................................................................................ 28
2.18 System pressure protection ........................................................................................... 28
2.18.1 High-pressure safety switch ............................................................................... 28
2.18.2 High pressure: pressure relief valve ................................................................... 28
2.18.3 Low-pressure safety switch – Optional .............................................................. 28
2.19 Other inputs of the XCM25D controller .......................................................................... 28
2.19.1 Customer-supplied control (room thermostat).................................................... 28
2.19.2 Case temperature controller ............................................................................... 28
2.19.3 Ambient temperature sensor .............................................................................. 28
2.20 Output of the XCM25D controller – Alarm output (DO5) ............................................... 29
2.21 Dimensions in mm ......................................................................................................... 29
3 Installation ...................................................................................................... 30
3.1 Condensing unit handling .............................................................................................. 30
3.1.1 Transport and storage ........................................................................................ 30
3.1.2 Weights............................................................................................................... 30
3.2 Electrical connection ...................................................................................................... 31
3.2.1 Power supply connections.................................................................................. 31
3.2.2 Maximum operating currents for cable selection ............................................... 31
3.2.3 Electrical wiring .................................................................................................. 31
3.2.4 Electrical protection standard (protection class) ................................................ 32
3.2.5 Main fuses .......................................................................................................... 32
3.3 Refrigeration piping connections ................................................................................... 32
3.3.1 Refrigeration piping installation .......................................................................... 32
3.3.2 Brazing recommendations.................................................................................. 33
3.3.3 Brazing procedure .............................................................................................. 34
3.4 Location & fixings ........................................................................................................... 34
3.5 Required distances ........................................................................................................ 35
4 Starting up & operation.................................................................................. 36
C6.1.6/0117-1017/E