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Installation and maintenance instructions ecoCRAFT 0020055744_08
7
Adapting the unit to the heating
system
The adaptation of the boiler to the heating installation is
carried out in the Diagnostic Mode. The operating con-
cept for the selection of the various parameters and
their setting is shown in Section 6.2. Some settings are
only intended for the heating engineer and can only be
called up after service code "
17
" has been entered at di-
agnostic point
97
.
An overview of the diagnostic points that can be set can
be found in Table 7.1.
Diagnostic
point
Description
Setting range
Default setting
d.0
Heating partial load
Settable values in kW
Maximum output in heat-
ing mode
d.1
Water pump overrun time for heating mode
2 - 60 min
5 min
d.2
Maximum burner block time at 20 °C
2 - 60 min
20 min
d.17
Changeover control type
0 = flow temperature regulation
1 =
return temperature regulation
(e.g. for underfloor heating)
0
d.18
Pump operating mode
1 = comfort
3 = eco
1 = comfort
d.20
Maximum setting value of cylinder target temp. po-
tentiometer
50 °C - 70 °C
65 °C
d.26
Internal accessory relay to X 6 (pink plug)
1 = circulation pump (factory fitted);
2 = ext. pump
3 = cylinder charging pump
4 =
flue non-return valve/extractor
hood; Warning: inverse of d27/28
5 = external gas valve
6 = external error message
d.27
Switching of accessory relay 1 on the VR40 acces-
sory
1 = circulation
pump
2 = ext. pump
3 = cylinder charging pump
4 =
flue non-return valve/extractor
hood
5 = external gas valve
6 = external error message
1 = circulation pump
d.28
Switching of accessory relay 2 on the VR40 acces-
sory
1 = circulation
pump
2 = ext. pump
3 = cylinder charging pump
4 =
flue non-return valve/extractor
hood
5 = external gas valve
6 = external error message
2 = ext. pump
d.54
Switch-on hysteresis relative to the current target
value
0...-10 K
-2 K
d.55
Switch-off hysteresis
0 ... 10 K
6 K
d.71
Maximum target value that can be set for the heat-
ing flow temperature
40 °C - 85 °C
75 °C
d.72
Pump overrun time after charging one of the DHW
cylinders controlled by the electronics (charging via
C1/C2)
0 - 600 s
300 s
d.75
Maximum charging time for a storage without own
controller
20 - 90 min
45 min
Table 7.1 Settable diagnostic points (continued on next page)
Adapting the unit to the heating system 7