8 Adapting the unit to the heating installation
26
Installation and maintenance instructions ecoTEC plus 0020134823_07
8.5
Setting the return temperature control
system
If the product is connected to an underfloor heating system,
the temperature control can be changed from flow temper-
ature control (factory setting) to return temperature control
under
D.017
. If you have activated the return temperature
control under
D.017
, the automatic heating output determin-
ation function is not active. If you set
D.000
to
Auto
anyway,
the product operates with the maximum possible partial heat
load.
8.6
Burner anti-cycling time
8.6.1
Setting the burner anti-cycling time
To prevent frequent switching on and off of the burner and
thus prevent energy losses, an electronic restart lockout
is activated for a specific period each time the burner is
switched off. You can adjust the burner anti-cycling time to
the conditions of the heating installation. The burner anti-
cycling time is only active for the heating mode. You can set
the maximum burner anti-cycling time under
D.002
(default
setting: 20 min.). The effective burner anti-cycling times with
respect to the target flow temperature and the maximum set
burner anti-cycling time can be found in the following table:
T
Flow
(target)
[°C]
Set maximum burner anti-cycling time [min]
1
5
10
15
20
25
30
30
2.0
4.0
8.5
12.5
16.5
20.5
25.0
35
2.0
4.0
7.5
11.0
15.0
18.5
22.0
40
2.0
3.5
6.5
10.0
13.0
16.5
19.5
45
2.0
3.0
6.0
8.5
11.5
14.0
17.0
50
2.0
3.0
5.0
7.5
9.5
12.0
14.0
55
2.0
2.5
4.5
6.0
8.0
10.0
11.5
60
2.0
2.0
3.5
5.0
6.0
7.5
9.0
65
2.0
1.5
2.5
3.5
4.5
5.5
6.5
70
2.0
1.5
2.0
2.5
2.5
3.0
3.5
75
2.0
1.0
1.0
1.0
1.0
1.0
1.0
T
Flow
(target)
[°C]
Set maximum burner anti-cycling time [min]
35
40
45
50
55
60
30
29.0
33.0
37.0
41.0
45.0
49.5
35
25.5
29.5
33.0
36.5
40.5
44.0
40
22.5
26.0
29.0
32.0
35.5
38.5
45
19.5
22.5
25.0
27.5
30.5
33.0
50
16.5
18.5
21.0
23.5
25.5
28.0
55
13.5
15.0
17.0
19.0
20.5
22.5
60
10.5
11.5
13.0
14.5
15.5
17.0
65
7.0
8.0
9.0
10.0
11.0
11.5
70
4.0
4.5
5.0
5.5
6.0
6.5
75
1.0
1.0
1.0
1.0
1.0
1.0
Note
The remaining burner anti-cycling time following a
regular shutdown in heating mode can be called
up under
D.067
.
8.6.2
Resetting the remaining burner anti-cycling
time
1st option
Menu
→
Reset anti-cycling time
The current burner anti-cycling time appears in the display.
▶
Confirm the burner anti-cycling time reset by pressing
(
Select
).
2nd option
▶
Press the reset button.
8.7
Setting the maintenance interval
If you set the maintenance interval, the message that the
product must be serviced appears in the display, together
with the maintenance symbol
, after a configurable number
of burner operating hours. The display on the eBUS control
shows the information
Maintenance MAIN
.
▶
Set the operating hours until the next maintenance work
is due using
D.084
. You can set the operating hours in
increments of ten from 0 to 3010 h (hours).
If you do not set a numerical value, but instead set the sym-
bol "
–
", the "
Maintenance display
" function is not active.
Note
On completion of the set operating hours, you
must set the maintenance interval again.
8.8
Pump output (high-efficiency pump)
The product can be equipped with a pump group with a high-
efficiency pump (accessories). The pump is fully modulating
and is actuated according to the heat requirement.
The remaining feed head of this pump group is designed so
that the full heat output is transported as far as the system
separation.
Remaining feed head
The following values apply for a pump speed target value
≥
85%:
Unit output
80 kW
100 kW
120 kW
Circulation water
volume at maximum
heat input (
Δ
T=23 K)
2.99 m
³
/h
3.74 m
³
/h
4.49 m
³
/h
Water pressure
downstream of the
boiler at maximum
water flow rate,
with
non-return valve
0.065 MPa
(0.650 bar)
0.053 MPa
(0.530 bar)
0.042 MPa
(0.420 bar)
Water pressure
downstream of the
boiler at maximum
water flow rate,
without
non-return
valve
0.073 MPa
(0.730 bar)
0.061 MPa
(0.610 bar)
0.050 MPa
(0.500 bar)
Summary of Contents for ecoTEC plus VU GB 5-5 Series
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