Daikin D2CND028A1AA, Servicing Manual

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D2CND0 D2CND0 D2CND0
D2CND0 D2TND0 D2TND035A4AA
Wall-mounted condensing boiler
ESIE17 - 09 / 2017.11
Servicing manual
3
Table of Contents
Table of Contents
1
GENERAL INFORMATIONS
4
1.1 Symbols on the package
...................................
4
1.2 Safety instructions
...............................................
4
2 APPLIANCE INFORMATIONS
4
2.1 Safety systems of the appliance
...................
4
2.2 Dimensions
..............................................................
5
2.3 Appliance structure and components
........
6
2.4 Techical Specification
........................................
7
2.5 Wiring diagram
.......................................................
8
3 MAINTENANCE
9
3.1 Maintenance work to be carried out
annually
.....................................................................
9
3.2 Important notes
.....................................................
9
3.3 Spare parts
...............................................................
9
3.4 Checking the connections and piping
.......
9
3.5 Condensate Trap Cleaning
...............................
9
3.6 Minimum Installation Clearances
...............
10
4 PART REPLACEMENT
10
4.1 Draining the Boiler
...........................................
10
4.1.1 Central Heating Circuit
.....................................
10
4.1.2 Domestic Hot Water Circuit
..........................
10
4.2 Opening the Appliance
.....................................
11
4.3 Cable Group Removal
......................................
12
4.4 Fan Group Removal
...........................................
14
4.5 Heat Exchanger and Burner Removal
.....
15
4.5.1 Heat Exchanger Cleaning
...............................
16
4.5.2 Burner Cleaning
..................................................
16
4.6 Return Hydroblock( Pump Group)
Removal
...................................................................
17
4.6.1 3 Way Valve Motor (Stepper Motor)
Removal
.................................................................
17
4.7 Flow Hydroblock Replacement
....................
18
4.7.1 Domestic Hot Water (DHW) NTC
Sensor Removal (Only combi models)
....
18
4.8 Syphon Part Removal
.......................................
19
4.9 Expansion Vessel Removal
...........................
19
4.10 Plate Heat Exchanger Removal
(Only C- Model)
....................................................
20
4.11 PCB Removal
........................................................
20
4.11.2 Terminal (X1M) Removal
.................................
21
5 INSTALLATION INFORMATIONS
22
5.1 Filling the System With Water
......................
22
5.2 Converting For Use With a Different
Type of Gas
............................................................
22
5.3 Combining the Boiler With Options
...........
23
6 COMMISSIONING
23
6.1 To fill the condensate trap
..............................
23
6.2 Gas-air ratio: No need to adjust
..................
24
6.4 To commission the unit
...................................
24
6.4.1 To commission the central heating
............
24
6.4.2 To commission the central heating
capacity setting
...................................................
24
6.4.3 To commission the domestic hot water
...
24
7 OPERATION
25
7.1 User interface
.......................................................
25
7.2 Operating The Appliance Switching ON
..
26
7.2.1 Low Water Temperature Function
..............
26
7.3 Basic use
................................................................
26
7.4 Description of the Operation Modes
.........
26
7.5 Changing Temperature Setpoints
...............
27
7.6 Central Heating Operation Modes
..............
27
7.7 Domestic hot water operation
......................
28
7.8 Boiler Frost Protection
...................................
28
7.9 Error Handling
......................................................
28
7.10 Menu Functions
...................................................
29
7.10.2 User settings menu
.........................................
30
7.10.2.1 Detailed Explanations of User
Parameters
.............................................................
30
7.10.3.1 Service Parameters (P)
...................................
31
7.10.3.2 Detailed Explanations of Service
Parameters
.............................................................
31
7.10.3.3 Entering Service Parameters (P)
.................
32
7.10.3.4 Select P00 to reach service
parameters (P).
.....................................................
32
7.10.4 DHW Solar Function
..........................................
33
7.10.4.1 DHW solar function logic
................................
33
7.10.5 Connecting the Appliance to
Underfloor Heating (UFH) System
..............
33
7.10.6 Weather Compensation
...................................
33
7.10.6.2 Effect of Heating Slope to CH
Temperature
..........................................................
34
7.10.7.1 Detailed Explanations of C Parameters
...
34
7.10.7.2 Entering SCOT Parameters
............................
35
7.10.8 Manual SCOT calibration
................................
36
7.10.9 Error Parameters (E)
.........................................
36
7.10.10 Sweeper Mode
......................................................
37
8 SAFETY OPERATION
FUNCTIONS
37
8.1 Low Water Temperature (LWT)
Function
................................................................
37
8.2 Temperature Gradient Supervision
..........
37
8.3 Pump Control For By-pass Opeariton
......
38
8.4 Supervision Flow/Return Temp.
(Delta-T control)
...................................................
38
8.5 Anti-Legionella Function
.................................
38
9 OPTIONAL PARTS
38
9.1 Boiler Chip Card (BCC)
....................................
38
9.1.1 Spare Part PCB
....................................................
38
9.1.2 BCC installation procedure
...........................
38
9.1.3 Plugging wrong BCC
........................................
39
9.1.4 Error during Parameter-transfer
..................
39
9.1.5 Re-installing an already installed BCC
....
39
10 TROUBLESHOOTING
40