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Carel Inte kategoriserad µC3

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Sida 1/81

µchiller 3

ENG User manual

CONTENTS

1. INTRODUCTION ............................................................................................................................................................................... 5

1.1 General description ................................................................................................................................................................... 5

1.2 User interface ............................................................................................................................................................................ 5

1.3 Programming procedure ............................................................................................................................................................ 6

2. PGD0 TERMINAL ............................................................................................................................................................................. 6

2.1 Passwords and levels of access ................................................................................................................................................ 6

2.2 Type of connectors .................................................................................................................................................................... 6

3. APPLICATIONS ................................................................................................................................................................................ 7

3.1 AIR/AIR units, single circuit ....................................................................................................................................................... 7

3.2 AIR/AIR units, two circuits ......................................................................................................................................................... 7

3.3 AIR/AIR units, two circuits, 1 condenser fan circuit ................................................................................................................... 8

3.4 AIR/AIR heat pumps, single circuit ............................................................................................................................................ 8

3.5 AIR/AIR heat pumps, two circuits .............................................................................................................................................. 9

3.6 AIR/AIR heat pumps, two circuits, 1 condenser fan circuit ........................................................................................................ 9

3.7 AIR/AIR chillers, single circuit .................................................................................................................................................. 10

3.8 AIR/AIR chillers, two circuits, 2 condenser fan circuits and 2 evaporators .............................................................................. 10

3.9 AIR/WATER chillers, two circuits, 1 condenser fan circuit ....................................................................................................... 11

3.10 AIR/WATER heat pumps, single circuit ................................................................................................................................... 11

3.11 AIR/WATER heat pumps, 2 condenser fan circuits ................................................................................................................. 12

3.12 AIR/WATER heat pumps, two circuits, 1 condenser fan circuit ............................................................................................... 12

3.13 WATER/WATER chillers, single circuit .................................................................................................................................... 13

3.14 WATER/WATER chillers, two circuits ...................................................................................................................................... 13

3.15 WATER/WATER chillers, two circuits, 2 evaporators .............................................................................................................. 14

3.16 WATER/WATER heat pumps with reversal on the refrigerant circuit, single circuit ................................................................. 14

3.17 WATER/WATER heat pumps with reversal on the refrigerant circuit, two circuits ................................................................... 15

3.18 WATER/WATER heat pumps with reversal on the refrigerant circuit, two circuits, 1 evaporator ............................................. 15

3.19 WATER/WATER heat pumps with reversal on the water circuit, single circuit ........................................................................ 16

3.20 WATER/WATER heat pumps with reversal on the water circuit, two circuits, H02= 1 and H21= 4 ......................................... 16

3.21 WATER/WATER heat pumps with reversal on the water circuit, two circuits, 1 evaporator H02= 1 and H21= 4 .................... 17

3.22 Air-cooled condensing unit without reverse cycle, single circuit .............................................................................................. 17

3.23 Air-cooled condensing unit without reverse cycle, two circuits ................................................................................................ 18

3.24 Reverse-cycle air-cooled condensing unit, single circuit ......................................................................................................... 18

3.25 Reverse-cycle air-cooled condensing unit, two circuits with condenser fan circuit .................................................................. 19

3.26 Water-cooled condensing unit without reverse cycle, single circuit ......................................................................................... 19

3.27 Water-cooled condensing unit without reverse cycle, two circuits ........................................................................................... 20

3.28 Reverse-cycle water-cooled condensing unit, single circuit ..................................................................................................... 20

3.29 Reverse-cycle water-cooled condensing unit, two circuits ....................................................................................................... 21

4. PARAMETERS ............................................................................................................................................................................... 22

4.1 Menu layout ............................................................................................................................................................................. 22

4.2 List of parameters with the pLD user interface ........................................................................................................................ 23

4.3 List of parameters with the pGD user interface ........................................................................................................................ 25

5. CONNECTIONS .............................................................................................................................................................................. 41

6. DESCRIPTION OF THE MAIN FUNCTIONS .................................................................................................................................. 43

6.1 Control set point ...................................................................................................................................................................... 43

6.2 Inlet-room temperature control ................................................................................................................................................ 44

7. DESCRIPTION OF OPERATION .................................................................................................................................................... 45

7.1 Outlet temperature control ....................................................................................................................................................... 45

7.2 Differential Temperature Control ............................................................................................................................................. 47

7.3 Condensing unit control ........................................................................................................................................................... 47

7.4 Compressor rotation ................................................................................................................................................................ 49

7.5 TANDEM – TRIO compressor rotation .................................................................................................................................... 50

7.6 Compressor safety times ......................................................................................................................................................... 50

7.7 Pumpdown management ......................................................................................................................................................... 52

7.8 Main pump management ......................................................................................................................................................... 53

7.9 Pump rotation .......................................................................................................................................................................... 53

7.10 Electric heaters ........................................................................................................................................................................ 54

7.11 Selecting the operating mode .................................................................................................................................................. 55

7.12 ON/OFF time bands ................................................................................................................................................................ 55

7.13 Antifreeze control ..................................................................................................................................................................... 56

7.14 Condenser - evaporator control ............................................................................................................................................... 57

7.15 Prevent function ....................................................................................................................................................................... 59

7.16 Low noise function ................................................................................................................................................................... 59

7.17 Start with hot condenser .......................................................................................................................................................... 59