Nibe F1145 Series Installation Manual page 33

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. F1145 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 present 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
F1145 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.
Caution
When an accessory for passive cooling is used,
the brine pump speed must be set in menu
5.1.9.
Set the pump speed when the system has come into
balance (ideally 5 minutes after compressor start).
Adjust the flow so the temperature difference between
brine out (BT11) and brine in (BT10) is between 2 - 5 °C.
Check these temperatures in menu 3.1 "service info"
and adjust the brine pump's (GP2) speed until the tem-
perature difference is obtained. A large difference indic-
ates a low brine flow and a small difference indicates a
high brine flow.
Read off what speed the brine pump should have during
manual operation from the diagram below.
NIBE F1145
20
10
0
0,0 0,05 0,10 0,15
Tillgängligt tryck, kPa
Available pressure, kPa
Electrical output, W
Eleffekt, W
p
F1145 6 and 8 kW
Pumpkapacitet, köldbärarsida för F1145/F1245 6kW.
Available pressure, kPa
Tillgängligt tryck, kPa
Electrical output, W
Eleffekt, W
100
90
80
70
60
50
40
30
20
P40%
10
40%
0
0,0 0,05 0,10 0,15 0,20 0,25 0,30 0,35 0,40 0,45 0,50
F1145 10 kW
Pumpkapacitet, köldbärarsida för F1145/F1245 10kW.
Available pressure, kPa
Tillgängligt tryck, kPa
Electrical output, W
Eleffekt, W
200
180
160
140
120
100
80
60
40
20
0
0,0 0,10 0,20 0,30
F1145 12 kW
Pumpkapacitet, köldbärarsida för F1145/F1245 12kW.
Available pressure, kPa
Tillgängligt tryck, kPa
Electrical output, W
Eleffekt, W
200
180
160
140
120
100
80
60
40
P40%
20
40%
0
0,0 0,10 0,20 0,30
Chapter 6 | Commissioning and adjusting
2
P40%
1
0,20 0,25 0,30 0,35
P100%
P80%
100%
80%
P60%
60%
Flöde l/s
Flow l/s
P100%
P80%
100%
80%
P60%
P40%
60%
40%
0,40 0,50 0,60
Flöde l/s
Flow l/s
P100%
P80%
100%
P60% 80%
60%
0,40 0,50 0,60
Flöde l/s
Flow l/s
0,40 0,45
Flöde l/s
0,70
0,70
33