Nibe S1255-12, Installer Manual, Page: 31 / 92

S1255 12 kW
(kPa) (W)
Flöde
(l/s)
0
0,0 0,1 0,2 0,3 0,4 0,5 0,6 0,7
40
20
60
100
160
140
80
120
180
200
0
80
60
40
20
100
120
140
160
180
200
40%
60%
80%
100%
P100%
P80%
P40%
P60%
Available pressure
Flow
Output
S1255 16 kW
60%
100%
80%
40%
0
0 0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8
80
60
40
20
100
120
140
160
180
200
0
80
60
40
20
100
120
140
160
180
200
(kPa) (W)
Flöde
(l/s)
P 100%
P80%
P60%
P40%
Available pressure
Flow
Output
Heating medium side
S1255 has a heating medium pump that can be con-
trolled automatically. For manual operation, deactivate
"Auto" in menu 7.1.2.2 and then set the speed according
to the diagrams below.
The flow must have a suitable temperature difference
for the operating case (heating operation: 5 - 10 °C, hot
water generation: 5 - 10 °C, pool heating: approx. 15 °C)
between controlling supply temperature sensor and re-
turn line sensor. Check these temperatures in menu 3.1
"Operating info" and adjust the heating medium pump
(GP1) speed until the temperature difference is attained.
A high difference indicates a low heating medium supply
and a low difference indicates a high heating medium
supply.
Read off what speed the heating medium pump should
have during manual operation from the diagrams below.
Available pressure, kPa
Electrical output, W
0
0,0 0,05 0,10 0,15 0,20 0,25 0,30 0,45
10
20
30
40
50
60
Tillgängligt tryck, kPa
Eleffekt, W
Flöde l/s
P100%
P80%
P60%
P40%
Tillgängligt tryck, kPa
Eleffekt, W
1
2
3
4
70
80
0,35 0,40
p
S1255 6 kW
100%
80%
60%
40%
0
20
10
40
30
60
50
70
80
(kPa)
0 0,05 0,1 0,2 0,15 0,25 0,30 0,35 0,40
Flöde
(l/s)
P100%
P80%
P60%
P40%
0
50
30
40
20
10
60
70
80
(W)
Available pressure
Flow
Output
S1255 12 kW
(kPa) (W)
Flöde
(l/s)
0
0,0 0,1 0,2 0,3 0,4 0,5 0,6
30
10
20
40
50
60
70
80
0
80
70
50
60
40
30
20
10
P100%
P80%
P40%
P60%
100%
80%
60%
40%
Available pressure
Flow
Output
S1255 16 kW
100%
80%
60%
40%
0
0 0,1 0,2 0,3 0,4 0,5 0,6
20
40
60
80
100
120
140
(kPa)
Flöde
(l/s)
P100%
P80%
P60%
P40%
0
80
60
40
20
100
120
140
(W)
Available pressure
Flow
Output
Readjusting, venting, heat medium side
Air is initially released from the hot water and venting
may be necessary. If gurgling sounds can be heard from
the heat pump or climate system, the entire system will
require additional venting.
31 Chapter 6 | Commissioning and adjusting NIBE S1255