4
AHU Kit – Installation Instructions – 07/2023
Contents
Table of Contents
1
General information and safety notes ................................................................... 6
1.1 General information ................................................................................................................. 6
1.2 Safety notes .............................................................................................................................. 8
1.3 Instructions for the safe handling of R32 .............................................................................. 9
1.3.1 Calculating the density limit ............................................................................................. 10
1.3.2 Preventing leakages ........................................................................................................ 17
1.3.3 Detecting leaks ................................................................................................................ 17
1.3.4 Repairing leaks ................................................................................................................ 17
1.4 Warranty policy ........................................................................................................................ 17
2
Ventilation theory and air handling units .............................................................. 19
2.1 Purpose of air-conditioning .................................................................................................... 19
2.2 Mechanical ventilation systems ............................................................................................. 20
2.3 Air handling units ..................................................................................................................... 20
3
Product description ................................................................................................. 23
3.1 General description ................................................................................................................. 23
3.2 Scope of supply ....................................................................................................................... 23
3.3 System lineup ........................................................................................................................... 28
3.4 System Overview ..................................................................................................................... 30
3.5 Technical data .......................................................................................................................... 33
4 Installation ................................................................................................................ 39
4.1 Installation of AHU Kit ............................................................................................................. 39
4.1.1 MAH3 / PAH3 generation ................................................................................................. 39
4.1.2 Installation of refrigerant piping ........................................................................................ 41
4.2 Installation of expansion valve ............................................................................................... 41
4.3 Installation of thermistors ....................................................................................................... 42
4.3.1 Installation of thermistor on gas pipe ............................................................................... 43
4.3.2 Installation of thermistor on liquid pipe............................................................................. 44
4.3.3 Installation of thermistor on heat exchanger pipe middle ................................................ 45
4.3.4 Installation of thermistor for suction and discharge air stream......................................... 45
4.4 Matching outdoor unit capacity with AHU Kit capacity ........................................................ 46
5
Electrical Wiring ....................................................................................................... 53
5.1 General precautions on wiring ............................................................................................... 53
5.2 Connection of wiring to terminals .......................................................................................... 53
5.3 Terminal board layout .............................................................................................................. 55
5.3.1 MAH3 models .................................................................................................................. 55
5.3.2 PAH3 model ..................................................................................................................... 60
5.4 Wiring layout ............................................................................................................................ 63
5.5 Wiring system diagrams .......................................................................................................... 65
5.6 Connection of external signal lines........................................................................................ 73
Summary of Contents for PAW-160MAH3M
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Page 90: ...90 AHU Kit Installation Instructions 07 2023 Parameter settings 9 Notes...
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