Daikin EWYT021CZI-A1, Installation And Maintenance Manual

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6.4. To connect the refrigerant piping to the indoor unit .............................................................................................. 36
6.5. Checking the refrigerant piping ............................................................................................................................. 37
6.5.1. Pressure Leak Test ................................................................................................................................... 37
6.5.2. To perform vacuum drying ........................................................................................................................ 37
6.5.3. To insulate the refrigerant piping ............................................................................................................... 38
6.6. Charging Refrigerant ............................................................................................................................................ 38
6.6.1. Precautions when charging refrigerant...................................................................................................... 39
6.6.2. To determine the additional refrigerant amount ........................................................................................ 39
6.6.3. Pre-charging refrigerant ............................................................................................................................ 40
6.6.4. Checks after charging refrigerant .............................................................................................................. 41
7.
OPERATOR’S REPONSIBILITIES............................................................................................................................... 42
8. MAINTENANCE ............................................................................................................................................................ 43
8.1. Pressure / temperature table ................................................................................................................................ 44
8.2. Routine maintenance ............................................................................................................................................ 44
8.2.1. Air Heat Exchanger Maintenance.............................................................................................................. 46
8.2.2. Electrical Installation.................................................................................................................................. 47
8.2.3. Service and limited warranty ..................................................................................................................... 47
9. REFRIGERANT CIRCUIT SCHEME ............................................................................................................................ 48
10. LIST OF THE LABELS APPLIED TO THE UNITS ...................................................................................................... 53
11. COMMISSIONING ........................................................................................................................................................ 56
12. IMPORTANT INFORMATION ON THE REFRIGERANT USED .................................................................................. 57
13. PERIODIC CHECKS AND COMMISSIONING OF PRESSURE EQUIPMENT ............................................................ 57
14. DISMISSION AND DISPOSAL ..................................................................................................................................... 57
List of figures
Figure 1
– Lifting the outdoor MONO unit ........................................................................................................................... 14
Figure 2
– Lifting the outdoor DUAL unit............................................................................................................................. 15
Figure 3
– Indoor Unit Handling & LIFTING ........................................................................................................................ 15
Figure 4
– MONO unit positioning....................................................................................................................................... 16
Figure 5
– DUAL unit positioning ........................................................................................................................................ 16
Figure 6
– Mounting holes location (bottom view) .............................................................................................................. 16
Figure 7
– DUAL unit .......................................................................................................................................................... 17
Figure 8
– Units installed side by side along their shorter sides, B or D ............................................................................. 18
Figure 9
– Units installed side by side along their longer sides (Case 1 and Case 2) ........................................................ 18
Figure 10
– Indoor Unit minimum space requirements ....................................................................................................... 19
Figure 11
– Seaside installation of the outdoor unit ............................................................................................................ 20
Figure 12
– Piping scheme Indoor unit - Outdoor unit ........................................................................................................ 21
Figure 13
– Hydraulic diagram ............................................................................................................................................ 22
Figure 14
– Hydraulic elements .......................................................................................................................................... 22
Figure 15
– Water filter pressure drops .............................................................................................................................. 24
Figure 16
– External pressure head of water pump ............................................................................................................ 25
Figure 17
– Operating limits on EWYT_CZ in cooling mode .............................................................................................. 25
Figure 18
– Operating limits on EWYTCZ in heating mode ................................................................................................ 26
Figure 19
– Minimum water volume correction factor ......................................................................................................... 27
Figure 20
– Initial expansion vessel pressure based on maximum water volume .............................................................. 28
Figure 21
– Master Wiring diagram..................................................................................................................................... 31
Figure 22
– Pipe Brazing .................................................................................................................................................... 34
Figure 23
– Ball-Valve......................................................................................................................................................... 34
Figure 24
– Refrigerant circuit (P&ID) diagram for MONO circuit EWYT~CZ unit .............................................................. 48
Figure 25
– Water Circuit P&ID for EWYT-CZ Units ........................................................................................................... 50
Figure 26
– Refrigerant circuit (P&ID) diagram for DUAL circuit EWYT~CZ outdoor unit .................................................. 51
Figure 27
– Refrigerant circuit (P&ID) diagram for DUAL circuit EWYT~CZ indoor unit .................................................... 52
Figure 28
– Labels on the outdoor unit ............................................................................................................................... 54
Figure 29
– Labels on the indoor unit ................................................................................................................................. 54
Figure 30
– Labels on the indoor unit – Electric panel side ................................................................................................ 55