
7Electrical connection................................................................................................................................................ 59
7.1 Connecting to an external protective conductor system......................................................................................59
7.2 AC motors...........................................................................................................................................................59
7.3 Repair switch (emergency stop switch)...............................................................................................................64
7.4 Variable, frequency-controlled drives (VFD, frequency converters)....................................................................65
7.5 Electric heaters...................................................................................................................................................66
7.5.1 AHUs equipped from TRANE with control ETAMATIC................................................................................66
7.5.2 AHUs which are not equipped from TRANE with control (which have to be equipped with controls on
responsibility of the client) ...........................................................................................................................................66
7.6 Differential pressure restriction for plate heat exchangers..................................................................................68
7.7 Lighting...............................................................................................................................................................70
8Commissioning......................................................................................................................................................... 70
8.1 Preliminary steps ................................................................................................................................................70
8.1.1 Variable frequency controlled drives - parameters......................................................................................71
8.1.2 Airflow measurement by differential pressure measurement at the fan nozzle...........................................73
8.1.3 Heat exchanger...........................................................................................................................................75
8.1.4 Electric heater.............................................................................................................................................76
8.1.5 Filters..........................................................................................................................................................76
8.1.6 Humidifier / Air washer................................................................................................................................77
8.2 Refrigeration circuit.............................................................................................................................................78
8.2.1 General notes .............................................................................................................................................78
8.2.2 Manually starting the compressor via TRANE control system.....................................................................78
8.2.3 Refrigerant..................................................................................................................................................79
8.2.4 Compressor lubricant..................................................................................................................................79
8.3 Test run...............................................................................................................................................................79
9Maintenance.............................................................................................................................................................. 82
9.1 Control cabinet....................................................................................................................................................82
9.2 Fan / motor group ...............................................................................................................................................82
9.2.1 Fan..............................................................................................................................................................82
9.2.2 Motor...........................................................................................................................................................84
9.2.3 V-belt drive..................................................................................................................................................84
9.2.4 Re-tensioning of belts .................................................................................................................................86
9.2.5 Replacing of belts .......................................................................................................................................88
9.3 Air filters..............................................................................................................................................................88
9.3.1 Panel filters.................................................................................................................................................89
9.3.2 Bag filters....................................................................................................................................................90
9.3.3 HEPA filters.................................................................................................................................................90
9.3.4 Auto roll filters.............................................................................................................................................91
9.4 Heat exchangers.................................................................................................................................................91
9.4.1 Medium water / steam.................................................................................................................................91
9.4.2 Refrigerant..................................................................................................................................................92
9.4.3 Electric Heater ............................................................................................................................................92
9.5 Humidifier, Air washers.......................................................................................................................................92
9.5.1 Pump...........................................................................................................................................................92
9.5.2 Air washers.................................................................................................................................................93
9.5.3 Steam humidifiers.......................................................................................................................................93
9.5.4 Honey comb humidifiers..............................................................................................................................93
9.5.5 Spray tube humidifiers ................................................................................................................................94
9.6 Dampers .............................................................................................................................................................94
9.7 Sound attenuators...............................................................................................................................................94
9.8 Weather louver....................................................................................................................................................94
9.9 Energy recovery systems....................................................................................................................................94
9.9.1 Plate heat exchangers ................................................................................................................................94
9.9.2 Heat wheels................................................................................................................................................95
9.9.3 Heat pipes...................................................................................................................................................95
9.9.4 Accublocs....................................................................................................................................................95
9.10 Refrigeration circuit..........................................................................................................................................96
9.10.1 Leakage checks..........................................................................................................................................96
9.10.2 Maintenance ...............................................................................................................................................97
9.10.3 Inspection....................................................................................................................................................98
9.11 Hygienic units ..................................................................................................................................................99
9.12 Maintenance plan ............................................................................................................................................99
10 Information on airborne noise emitted by the air conditioning units - on request........................................... 101
11 ATEX units .............................................................................................................................................................. 101
11.1 General notes................................................................................................................................................101
11.2 Information regarding the unit, protective systems and components.............................................................103
11.3 Information for commissioning, maintenance and repair ...............................................................................104
11.3.1 Foundation and erection ...........................................................................................................................104