Adapting the unit to the installation 10
0020300875_01 Energy
7
Installation and maintenance instructions
35
10 Adapting the unit to the installation
You can reset/change the system parameters (section "Us-
ing diagnostics codes").
Overview of diagnostics codes (
10.1
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. The burner anti-cycling time is only active for
the heating mode. Domestic hot water mode during a burner
anti-cycling time does not affect the timing element.
10.1.1 Setting the maximum burner anti-cycling
time
1.
Set diagnostics code . (
Overview of diagnostics codes (
2.
If required, change the maximum burner anti-cycling
time using the diagnostics code
d.02
.
10.1.2 Resetting the remaining burner anti-cycling
time
▶
Hold the
button down for more than 3 seconds.
◁
is shown in the display.
10.2
Setting the pump output
The product is equipped with a speed-regulated high-effi-
ciency pump, which adjusts independently to the hydraulic
conditions of the heating installation.
If you have installed a low loss header in the heating install-
ation, you should switch off the speed regulation and set the
pump output to a fixed value.
▶
If required, change the setting of the pump speed, which
depends on the operating mode, under diagnostics code
d.14
.
▶
Set diagnostics code . (
Overview of diagnostics codes (
Flow rate-pressure curves for 25 kW
(pressure measured downstream of the valves)
A
B
0
10
20
30
40
50
60
0
200
400
600
800
1000
1200
1
2
3
4
1
Maximum speed (by-
pass closed)
2
Maximum speed (fact-
ory setting for the by-
pass)
3
Minimum speed (factory
setting for the bypass)
4
Flow rate at maximum
output (
Δ
T = 20K)
A
Flow rate in circuit (l/h)
B
Available pressure
(kPa)
Flow rate-pressure curves for 30 kW
(pressure measured downstream of the valves)
A
B
0
10
20
30
40
50
60
0
200
400
600
800
1000
1200
70
1
2
3
4
1
Maximum speed (by-
pass closed)
2
Maximum speed (fact-
ory setting for the by-
pass)
3
Minimum speed (factory
setting for the bypass)
4
Flow rate at maximum
output (
Δ
T = 20K)
A
Flow rate in circuit (l/h)
B
Available pressure
(kPa)
Flow rate-pressure curves for 35 kW
(pressure measured downstream of the valves)
A
B
0
10
20
30
40
50
60
0
200
400
600
800
1000
1200
70
1
2
3
4
1
Maximum speed (by-
pass closed)
2
Maximum speed (fact-
ory setting for the by-
pass)
3
Minimum speed (factory
setting for the bypass)
4
Flow rate at maximum
output (
Δ
T = 20K)
A
Flow rate in circuit (l/h)
B
Available pressure
(kPa)
10.3
Setting the bypass valve
Caution.
Risk of material damage caused by incor-
rect setting of the high-efficiency pump
If the pressure at the bypass valve is in-
creased (by turning it clockwise) and the
pump output is set to less than 100%, the
product may not operate correctly.
▶
In this case, set the pump output to
5 = 100% using diagnostics parameter
d.14
.