Danfoss BOCK UL-HGX12 CO2 T Operating Manual page 3

Contents
3 Areas of application....................................................................................................... 8
3.1 Refrigerants........................................................................................................................... 8
3.2 Oil charge.............................................................................................................................. 8
3.3 Limits of application.............................................................................................................. 8
3.4 Selection and operation of frequency converters.................................................................. 9
4 Compressor assembly................................................................................................... 10
4.1 Storage and transportation.................................................................................................... 1 0
4.2 Setting up.............................................................................................................................. 10
4.3 Connecting the pipelines - solder system.............................................................................. 11
4.4 Connecting the pipelines - cutting ring system..................................................................... 11
4.5 Pipes...................................................................................................................................... 1 2
4.6 Flange shut-off valves (HP/LP).............................................................................................. 12
4.7 Laying suction and pressure lines......................................................................................... 13
4.8 Operating the shut-off valves................................................................................................ 13
4.9 Operating mode of the lockable service connections............................................................ 14
4.10 Oil return................................................................................................................................ 1 4
4.11 Suction pipe filter................................................................................................................... 1 4
5 Electrical connection..................................................................................................... 15
5.1 Information for contactor and motor contactor selection....................................................... 1 5
5.2 Connection of the driving motor............................................................................................. 1 6
5.3 Circuit diagram for direct start 280 V Δ / 460 V Y................................................................. 18
5.4 Electronic trigger unit INT69 G.............................................................................................. 20
5.5 Connection of the electronic trigger unit INT69 G.................................................................. 2 0
5.6 Functional test of the electronic trigger unit INT69 G............................................................ 21
5.7 Oil sump heater...................................................................................................................... 2 1
5.8 Selection and operation of frequency converters.................................................................. 21
6 Commissioning............................................................................................................. 22
6.1 Preparations for start-up....................................................................................................... 22
6.2 Pressure strength test........................................................................................................... 22
6.3 Leak test................................................................................................................................ 2 2
6.4 Evacuation............................................................................................................................. 23
6.5 Refrigerant charge................................................................................................................. 2 3
6.6 Start-up................................................................................................................................. 24
6.7 Pressure switch..................................................................................................................... 24
6.8 Pressure relief valves............................................................................................................ 25
6.9 Avoiding slugging................................................................................................................... 2 6
6.10 Filter dryer............................................................................................................................. 26
7 Maintenance.................................................................................................................. 26
7.1 Preparation............................................................................................................................ 26
7.2 Work to be carried out........................................................................................................... 27
7.3 Spare parts recommendation / accessories.......................................................................... 27
7.4 Lubricants / oil....................................................................................................................... 2 7
7.5 Decommissioning.................................................................................................................. 27
8 Technical data................................................................................................................ 28
9 Dimensions and connections........................................................................................ 30
10 Declaration of incorporation......................................................................................... 32
11 UL-Certificate of Compliance........................................................................................ 34
© Danfoss | Climate Solutions | 2023.06
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