Daikin EWAT040CZNBA1 Bedienungsanleitung

Daikin Klimaanlage EWAT040CZNBA1

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Original Instructions

REV

Date

08/2023

Supersedes

D-EIMHP01405- 521_0 EN

Air to water heat pump units with scroll compressors

EWYT~CZ / EWAT~CZ

Installation, Maintenance and Operation Manual

D-EIMHP01405- 621_0 EN

D-EIMHP01405-21_06EN 2/ 43

CONTENTS

1 INTRODUCTION ..............................................................................................................................................................4

1.1 Precautions against residual risks ...........................................................................................................................4

1.2 General description ..................................................................................................................................................5

1.3 Information about the refrigerant 5 ..............................................................................................................................

1.4 Installation information .............................................................................................................................................6

2 RECEIPT OF THE UNIT 8 ...................................................................................................................................................

3 STORAGE ........................................................................................................................................................................8

4 MECHANICAL INSTALLATION 9 .......................................................................................................................................

4.1 Safety .......................................................................................................................................................................9

4.2 Handling and lifting 9 ...................................................................................................................................................

4.2.1 Lifting the MONO unit ...................................................................................................................................9

4.2.2 Lifting the DUAL unit ...................................................................................................................................10

4.3 Positioning and assembly ......................................................................................................................................10

4.3.1 Mounting the main switch handle ...............................................................................................................11

4.4 Minimum space requirements ................................................................................................................................11

4.5 Additional installation site requirements .................................................................................................................13

4.6 Noise and acoustic protection ................................................................................................................................14

4.7 Water circuit for connection with the unit ...............................................................................................................15

4.7.1 Water piping ................................................................................................................................................15

4.7.2 Flow-switch .................................................................................................................................................15

4.7.3 Heat recovery (optional) .............................................................................................................................16

4.7.4 Preparing and checking the water circuit connection .................................................................................17

4.7.5 Water pressure ...........................................................................................................................................17

4.7.6 Hydraulic diagram .......................................................................................................................................17

4.8 Water treatment .....................................................................................................................................................18

4.9 Water pressure drops for lters ..............................................................................................................................19

4.10 Pump kit mounted on board (Optional) ..................................................................................................................19

4.11 Operation limits ......................................................................................................................................................20

4.12 Operating stability and minimum water content in the system ..............................................................................22

4.13 Calibrating the expansion vessel ...........................................................................................................................23

4.14 Antifreeze protection for BPHE and recovery exchangers ....................................................................................24

5 ELECTRICAL INSTALLATION .......................................................................................................................................26

5.1 General specications ............................................................................................................................................26

5.2 Electric connections ...............................................................................................................................................26

5.3 Cable requirements ................................................................................................................................................26

5.3.1 Maximum cable dimension .........................................................................................................................27

5.3.2 Safety device requirements ........................................................................................................................28

5.4 Phase unbalance ...................................................................................................................................................28

6 . OPERATOR’S REP ONSIBILITIES................................................................................................................................ 29

7 MAINTENANCE ..............................................................................................................................................................30

7.1 Pressure / temperature table . ................................................................................................................................ 31

7.2 Routine maintenance .............................................................................................................................................31

7.2.1 Air Heat Exchanger Maintenance ...............................................................................................................31

7.2.2 Electrical Installation ...................................................................................................................................32

7.2.3 Service and limited warranty ......................................................................................................................32

7.2.4 Refrigerant circuit scheme ..........................................................................................................................35

8 LIST OF THE LABELS APPLIED TO THE UNIT ...........................................................................................................39

9 COMMISSIONING ..........................................................................................................................................................40

10 IMPORTANT INFORMATION ON THE REFRIGERANT USED ...................................................................................41

11 PERIODIC CHECKS AND COMMISSIONING OF PRESSURE EQUIPMENT .............................................................41

12 DISMISSION AND DISPOSAL .......................................................................................................................................41

D-EIMHP01405-21_06 3/EN 43

List of gures

Figure 1 Lifting the MONO unit –............................................................................................................................................ 9

Figure 2 Lifting the DUAL unit –............................................................................................................................................. 10

Figure 3 MONO unit positioning –......................................................................................................................................... 10

Figure 4 DUAL unit positioning –.......................................................................................................................................... 10

Figure 5 Mounting holes location (bottom view) –................................................................................................................. 11

Figure 6 DUAL-Unit –........................................................................................................................................................... 12

Figure 7 Units installed side by side along their shorter sides, B or D –.................................................................................. 13

Figure 8 Units installed side by side along their longer sides (Case 1 and Case 2) –.............................................................. 13

Figure 9 Seaside installation of the outdoor unit –.................................................................................................................. 14

Figure 10 Hydraulic diagram –............................................................................................................................................... 17

Figure 11 - Water lter pressure drops .................................................................................................................................. 19

Figure 12 - External pressure head of Low Lift Pump ............................................................................................................ 19

Figure 13 - External pressure head of High Lift Pump ........................................................................................................... 20

Figure 14 Operating limits on EWATCZ –............................................................................................................................ 20

Figure 15 - Operating limits on EWYTCZ in cooling mode .................................................................................................... 21

Figure 16 - Operating limits on EWYTCZ in heating mode .................................................................................................... 21

Figure 17 - Minimum water volume correction factor ............................................................................................................ 23

Figure 18 - Initial expansion vessel pressure on the basis of maximum water volume ........................................................... 24

Figure 19 - Refrigerant circuit (P&ID) diagram for MONO circuit EWYT~CZ unit ................................................................... 35

Figure 20 - Refrigerant circuit (P&ID) diagram for MONO circuit EWAT~CZ unit ................................................................... 36

Figure 21 - Refrigerant circuit (P&ID) diagram for DUAL circuit EWYT~CZ unit ..................................................................... 37

Figure 22 - Refrigerant circuit (P&ID) diagram for DUAL circuit EWAT~CZ unit ..................................................................... 38

Figure 23 - Labels on the unit ............................................................................................................................................... 39

List of tables

Table 1- Physical properties of R32 refrigerant ....................................................................................................................... 6

Table 2 - Minimum glycol percentage for low ambient air temperature .................................................................................. 15

Table 3 - Flow Switch Setpoint .............................................................................................................................................. 16

Table 4 Operating limits –...................................................................................................................................................... 16

Table 5 - Acceptable water quality limits ............................................................................................................................... 18

Table 6 - Pump curve associated with each unit size ............................................................................................................ 20

Table 7 - Minimum water content in the system .................................................................................................................... 22

Table 8 Main Switch unified clamping values –..................................................................................................................... 27

Table 9 - Table 1 of EN602041 Point 5.2 .............................................................................................................................. 27

Table 10 - R32 Pressure/Temperature .................................................................................................................................. 31

Table 11 - Standard Routine Maintenance Plan ................................................................................................................. 33

Table 12 Routine Maintenance Plan for Critical Application and/or Highly Aggressive Environment –................................... 34

Table 13 - Labels applied to the Unit ..................................................................................................................................... 39

Table 14 - Checks before starting up the unit ........................................................................................................................ 40