9 – 75
Aquarea air/water heat pump – Installation manual for monobloc and split systems C, D and E series 05 / 2014
9
Commis
-
sioning
Commissioning
Setting up the water pump
Setting the high efficiency pump
9.3.2 Setting the high efficiency pump
Warning!
Hydraulic decoupling between
the heat pump circuit and heat
consumer circuit is always re-
quired when using Aquarea
heat pumps with high efficiency
pumps – overflow valves may
not be used . If hydraulic decou-
pling is not implemented, the
flow could fall below the mini-
mum volume flow, which results
in error messages on the heat
pump . See also the instructions
in the design handbook .
The high efficiency pumps in Aquarea heat pumps have two control
types which can be set on the pump .
Δ
p-c – constant differential pressure:
The electronic system
holds the differential pressure target to be
maintained by the pump at the value set (level 1 to 7) as per the curve
below .
Δ
p-v – variable differential pressure:
The electronic system
changes the differential pressure target to be
maintained by the pump (configurable between levels 2 to 6), whereby
the differential pressure decreases simultaneously with the volume flow
to max . half of the differential pressure target .
Set the pump level of the high efficiency pump by turning the red adjus-
ting knob to ensure that the minimum volume flow is present .
Note
As standard, the high efficiency
pump is preset to control type
Δ
p-c, level 4 . Panasonic
recommends control type
Δ
p-c .
70
60
50
40
30
20
10
0
Flow rate [l
/
min]
Pump operating head [kPa
]
0
10
20
30
40
50
7
6
4
1
2
ext. in
4
7
6
5
4
3
2
1
50
40
30
20
10
Flow rate [l
/
min]
Pump operating head [kPa
]
0
10
20
30
40
50
6
5
4
3
2
Pump characteristic curve of the high efficiency water circulation pump for the Aquarea Mini monobloc devices WH-MDF06E3E5
and WH-MDF09E3E5
Δ
p-c – constant differential pressure
Δ
p-v – variable differential pressure
