Grant Aerona3 Series User Manual

Section 8: Operation Page 41
0
1
2
3
4
5
6
7
8
9
10
11
12
(m)
0 5 10 15
20(L/min)
Level3
Level2
Level1
HPID6
Figure 8-10: Pump output adjustment flow rate - HPID6R32
0
1
2
3
4
5
6
7
8
(m)
0 105 20
15 25 30 35
40(L/min)
Level3
Level2
Level1
HPID10
Figure 8-11: Pump output adjustment flow rate - HPID10R32
0
2
4
6
8
10
12
14
(m)
0 10 20 30 40
Level3
Level2
Level1
50(L/min)
HPID16
0
2
4
6
8
10
12
14
(m)
0 10 20 30 40
Level3
Level2
Level1
50(L/min)
Figure 8-12: Pump output adjustment flow rate - HPID13R32
8.3.7 Additional water pump
Parameter 5148 can be utilised to use an additional water pump.
Parameter 4220 can be used to set the desired type of pump operation as
follows:
1. Depending on main water pump setting
2. Depending on main water pump setting but always OFF when DHW
mode is activated
3. Always ON apart from if any alarms are active or if the heat pump is in
OFF mode
Option 2 is recommended for the majority of applications.
The connection between neutral and terminal 48 (Pump1) is ULC to 1 amp,
therefore a relay must be installed if an additional water pump is used. Refer
to Figure 8-13.
Additional water pump
230V 50Hz
P
Terminal PCB
Dehumidier
Neutral
EHS
45
46
47
48
49
N
41
42
43
44
Electric
heater
Heating
Cooling
mode
output
Alarm
Pump1
Pump2
Figure 8-13: Additional water pump
Table 8-14: Additional water pump parameters
Level
Parameter
Function description
Display and input value
Remarks
Group Code Default Min. Max. Unit
I 51 48
Terminal 48
0=disable
1=additional water pump
0 0 1 -
I 42 20
Type of operation of additional water pump
0=disable
1=depending on main water pump setting
2=depending on main water pump setting but always OFF when the
DHW mode is activated
3=always ON, apart from if any alarms are activated or if the heat
pump is in OFF mode
0 0 3 -
For details of how to access the parameter settings, refer to Section 9.3.
The water flow rate must be sufficient to
achieve an 8K difference between the flow and
return water temperatures.
In reference to option 3 above (and parameter
4220 in Table 8-13), ‘OFF’ mode means there is
a power supply to the heat pump but there is
no heating or hot water demand.
CAUTION
NOTE
Figure 8-13: Pump output adjustment flow rate - HPID17R32

Grant Aerona3 Series Specifications

General

Brand	Grant
Model	Aerona3 Series
Category	Heat Pump
Language	English