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7
Electrical 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
responsibility of the client) ........................................................................................................................................... 66
7.6
Differential pressure restriction for plate heat exchangers .................................................................................. 68
7.7
Lighting ............................................................................................................................................................... 70
8
Commissioning ......................................................................................................................................................... 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
9
Maintenance .............................................................................................................................................................. 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
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