Setting The Pump Output - Vaillant AutoCompact VSC D 4 Series Installation And Maintenance Instructions Manual

Burner operating hours until the
Number
Heat de- next inspection/maintenance work
of per-
mand is due (dependent upon the sys-
sons
tem type)
3 ‑ 4
2600 h
20.0 kW
4 ‑ 5
2700 h
3 ‑ 4
2800 h
25.0 kW
4 ‑ 6
2900 h
3 ‑ 4
3000 h
> 27.0 kW
4 ‑ 6
3000 h
The values stated correspond to an average operating time
of one year.
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

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 required, you can manually set the pump output to five
fixed, selectable steps based on the maximum possible out-
put. This switches the speed regulation off.
The pump operating mode is set to "auto" at the factory in
accordance with the most recent energy conservation ordin-
ance.
▶
To change the pump output, change D.014 to the desired
value.
Note
If you have installed a low loss header in the
heating installation, we recommend switching
off the speed regulation and setting the pump
output to a fixed value.
8.8.1 Remaining feed head, pump
8.8.1.1 Pump curve for 14 kW
B
70
60
1
2
50
40
30
20
4
10
5
0 500
1 Bypass
closed/Vmax/code
d148=8 (boost)
0020233500_01 auroCOMPACT Installation and maintenance instructions
Adapting the unit to the heating installation 8
3
1000 1500 A
2 Bypass
closed/Vmax/code
d14=0
3 Bypass in factory set-
ting/Vmax/code d148=8
(boost)
4 Bypass in factory set-
ting/Vmax/code d14=0
8.8.1.2 Pump characteristic line for 20 kW
B
70
60
1
2
50
40
30
20
4
10
5
0 500
1 Bypass
closed/Vmax/code
d148=8 (boost)
2 Bypass
closed/Vmax/code
d14=0
3 Bypass in factory set-
ting/Vmax/code d148=8
(boost)
8.8.2 Setting the pump output for subsidy
programmes
Characteristic line for proKlima (14 and 20 kW)
B
70
60
1
50
40
30
20
10
3
0 500
1 Bypass plug
d14=6/d122=400
2 Bypass plug
d14=6/d122=200
3 Bypass plug
d14=6/d122=100
Changes must be made during the installation for the proK-
lima or KfW label.
Setting for proKlima
▶
Remove the bypass and replace it with the plug that is
supplied.
▶
Set D.014 to 6 (= auto (Δp limit)).
▶
If required, adjust D.122 (set to 200 mbar as standard).
◁
The hydraulic pressure difference with respect to the
heating system is limited to the set value (see dia-
gram).
5 Bypass open/Vmin/code
d14=0
A Throughput in circuit
(l/h)
B Available pressure
(kPa)
3
1000 1500 A
4 Bypass in factory set-
ting/Vmax/code d14=0
5 Bypass open/Vmin/code
d14=0
A Throughput in circuit
(l/h)
B Available pressure
(kPa)
2
1000 1500 A
A Throughput in circuit
(l/h)
B Available pressure
(kPa)
29