Nibe F1255 Installation Manual page 34

Name and menu number
B.
Here, you can see which menu in the control system
this page of the start guide is based on. The digits in
brackets refer to the menu number in the control sys-
tem.
If you want to read more about affected menus either
consult the help menu or read the user manual.
Option / setting
C.
Make settings for the system here.
POST ADJUSTMENT AND VENTING
Pump adjustment, automatic operation
Brine side
To set the correct flow in the brine system, the brine
pump must run at the correct speed. F1255 has a brine
pump that is controlled automatically in standard mode.
Certain functions and accessories may demand that it
be run manually, in which case the correct speed must
be set.
TIP
For optimum operation when several heat
pumps are installed in a multi-installation, all
heat pumps should have the same compressor
size.
This automatic control occurs when the compressor is
running and sets the speed of the brine pump so that
the optimum temperature difference between the supply
and return lines is attained.
Heating medium side
To set the correct flow in the heating medium system,
the heating medium pump must run at the correct
speed. F1255 has a heating medium pump that can be
automatically controlled in standard mode. Certain
functions and accessories may require it to run manually
and the correct speed must then be set.
This automatic control occurs when the compressor is
running and sets the speed of the heating medium
pump, for the relevant operating mode, so the optimum
temperature difference between the supply and return
lines is achieved. During heating operation, the set DOT
(dimensioned outdoor temperature) and temperature
differential in menu 5.1.14 are used. If necessary, the
maximum speed of the circulation pump can be limited
in menu 5.1.11.
Pump adjustment, manual operation
Brine side
F1255 has a brine pump that can be automatically con-
trolled. For manual operation: deactivate "auto" in menu
5.1.9 and then set the speed according to the diagram
below.
34 Chapter 6 | Commissioning and adjusting
Caution
Tillgängligt tryck, kPa
Eleffekt, W
When an accessory for passive cooling is used,
80
the brine pump speed must be set in menu
5.1.9.
70
60
Set the pump speed when the system has come into
50 balance (ideally 5 minutes after compressor start).
Adjust the flow so the temperature difference between
40
brine out (BT11) and brine in (BT10) is between 2 - 5 °C.
30
Check these temperatures in menu 3.1 "service info"
and adjust the brine pump's (GP2) speed until the tem-
20
perature difference is obtained. A large difference indic-
10
ates a low brine flow and a small difference indicates a
0
high brine flow.
0,0 0,05 0,10 0,15
Tillgängligt tryck, kPa
Available pressure, kPa
Electrical output, W
Eleffekt, W
p
Pumpkapacitet, köldbärarsida för F1155-1255 -6 kW, manuell drift.
F1255 6 kW
Tillgängligt tryck
Available pressure, kPa
kPa
80
70
60
50
40
30
20
10
0
0,0 0,1 0,2
F1255 12 kW
Available pressure
(kPa)
200
180
160
140
120
100
80
60
40
20
0
0,0 0,1 0,2 0,3
Heating medium side
F1255 has a heating medium pump that can be automat-
ically controlled. For manual operation: deactivate "auto"
in menu 5.1.11 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
"service info" and adjust the heating medium pump
P60%
2
P40%
1
0,20 0,25 0,30 0,35
Eleffekt
Electrical input, W
W
100
P100% 90
80
P80%
70
60
50
P60%
40
P40%
100%
30
80%
20
60% 10
40%
0
0,3 0,4 0,5 0,6
Flöde l/s
Flow l/s
Output
(W)
P100%
P80%
P60%
100%
80%
P40%
60%
40%
0,4 0,5 0,6 0,7
Flow
Flöde
(l/s)
NIBE F1255
P100%
P80%
4
3
0,40 0,45
Flöde l/s
200
180
160
140
120
100
80
60
40
20
0