Daikin GCU compact Series, Installation And Operating Instructions Manual

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List of contents
Installation and operating instructions
3
Gas Combi Unit
Floor-standing gas condensing boiler with integrated heat storage
008.1543899_02 – 04/2019 – EN
List of contents
1 General safety precautions 5
1.1 Particular safety instructions ..................................................... 5
1.1.1 Observing the instructions .......................................... 6
1.1.2 Meaning of warnings and symbols.............................. 6
1.2 Safety instructions for installation and operation....................... 6
1.2.1 General ....................................................................... 6
1.2.2 Intended use ............................................................... 7
1.2.3 Installation room.......................................................... 7
1.2.4 Electrical installation ................................................... 7
1.2.5 Requirements for the heating water............................ 7
1.2.6 Heating system and sanitary connection .................... 8
1.2.7 Operation .................................................................... 8
2 Handover to operator and warranty 9
2.1 Instruct the owner ...................................................................... 9
2.2 Warranty conditions................................................................... 9
3 Product description 10
3.1 Design and components............................................................ 10
3.1.1 GCU compact 315 / 320 (Biv) ..................................... 10
3.1.2 GCU compact 515 / 520 / 524 / 528 (Biv) ................... 11
3.2 Brief description......................................................................... 13
4 Set-up and installation 15
4.1 Dimensions and connection dimensions ................................... 15
4.1.1 Connecting dimensions for the heating and hot water
connections................................................................. 16
4.2 Different set-ups ........................................................................ 17
4.2.1 Room-air independent operation ................................ 18
4.2.2 Partial ambient air-independent mode ........................ 18
4.2.3 Ambient air-dependent mode...................................... 19
4.2.4 Additional information on the device type in
accordance with CEN/TR 1749................................... 19
4.3 Transport and delivery............................................................... 20
4.4 Installing the GCU compact....................................................... 20
4.4.1 Selecting the installation site....................................... 20
4.4.2 Installing the device .................................................... 21
4.4.3 Removing the cover and thermal insulation................ 22
4.5 Air/flue gas system (LAS) .......................................................... 23
4.5.1 General instructions for the flue gas system............... 23
4.5.2 Connecting a flue gas line........................................... 24
4.5.3 Flue gas system kits ................................................... 25
4.6 Water connection ...................................................................... 26
4.6.1 Aligning the connections of the heating inflow and
return flow ................................................................... 27
4.6.2 Connecting hydraulic lines .......................................... 28
4.6.3 Connecting the condensate drain and storage tank
overflow....................................................................... 29
4.6.4 Installation of the DB connection kit............................ 29
4.6.5 Installation of the P connection kit .............................. 29
4.7 Electrical connection ................................................................. 30
4.7.1 Opening the control unit housing and establishing
electric connections .................................................... 30
4.7.2 Integrated heating circulation pump and 3-way valve. 33
4.7.3 Temperature sensors and further electrical
components ................................................................ 33
4.7.4 Connecting the RoCon OT1 outside temperature
sensor ......................................................................... 34
4.7.5 RoCon M1 mixer module ............................................ 35
4.7.6 RoCon U1 room controller .......................................... 35
4.7.7 RoCon G1 Internet gateway ....................................... 35
4.7.8 Room thermostat ........................................................ 35
4.7.9 External switching contact .......................................... 35
4.8 Connect the gas line, check the burner setting for gas type ..... 36
4.8.1 Important instructions for gas connection ................... 36
4.8.2 Connecting the gas line .............................................. 36
4.8.3 Removing/attaching the heat cell panelling ................ 36
4.8.4 Checking the gas presetting ........................................ 36
4.9 Filling the system........................................................................ 37
4.9.1 Checking the water quality and adjusting the
pressure gauge ............................................................ 37
4.9.2 Filling the hot water heat exchanger ............................ 37
4.9.3 Filling the condensate siphon ...................................... 37
4.9.4 Filling the storage tank................................................. 37
4.9.5 Filling the heating system ............................................ 37
5 Commissioning 38
5.1 Initial commissioning .................................................................. 38
5.1.1 Requirements............................................................... 38
5.1.2 Checks before commissioning ..................................... 38
5.1.3 Commissioning ............................................................ 38
5.1.4 After commissioning..................................................... 39
5.2 Checklists for commissioning ..................................................... 40
6 Controller and electronic components 41
6.1 Operating elements on the boiler control panel.......................... 41
6.2 Replacing the RoCon B1 control panel ...................................... 41
6.3 Changing sensors ...................................................................... 42
6.3.1 Replacing the inflow temperature sensor / return flow
temperature sensor and pressure sensor .................... 43
6.3.2 Replacing the internal mixer sensor for heating
support ......................................................................... 43
6.3.3 Changing the storage tank temperature sensor........... 43
7 Heat cell with gas burner 44
7.1 Design and brief description ....................................................... 44
7.2 Safety function............................................................................ 45
7.3 Burner setting ............................................................................. 45
7.3.1 Setting values .............................................................. 46
7.3.2 Establishing access to the burner ................................ 46
7.3.3 Checking and setting the burner .................................. 46
7.3.4 Starting problems – calibrating the combustion
control, setting the burner blower starting output and
gas volume................................................................... 47
7.3.5 Setting ignition and ionisation electrodes..................... 48
7.4 Dismantling the burner ............................................................... 49
8 Hydraulic connection 51
8.1 Hydraulic system connection...................................................... 51
9 Service and maintenance 53
9.1 General information regarding inspection and maintenance...... 53
9.2 Inspection and maintenance tasks ............................................. 53
9.2.1 Checking the connections and pipes ........................... 53
9.2.2 Check and clean combustion chamber and
condensate drain ......................................................... 53
9.2.3 Checking the storage tank fill level .............................. 55
9.2.4 Check and clean the burner......................................... 55
9.2.5 Filling, topping up the storage tank .............................. 55
9.2.6 Filling, topping up the heating system and storage
tank charging circuit ..................................................... 56
9.2.7 Venting the hydraulic block .......................................... 57
10 Errors and faults 59
10.1 Troubleshooting.......................................................................... 59
10.2 Overview of possible faults......................................................... 59
10.3 Error codes ................................................................................. 61
10.4 Rectifying burner faults and STB faults ...................................... 63
10.5 Emergency operation ................................................................. 63
11 Taking out of operation 64
11.1 Temporary shutdown.................................................................. 64
11.1.1 Draining the storage tank............................................. 64
11.1.2 Draining the heating circuit and hot water circuit ......... 65
11.2 Final shutdown and disposal ...................................................... 66
12 Technical data 67
12.1 Basic data................................................................................... 67
12.1.1 GCU compact 3xx........................................................ 67
12.1.2 GCU compact 5xx........................................................ 68