Nimbus Compact M NET R32 Installation Manual UK

Hydraulic connections
4.1.5 Available pressure
Hydraulic circuit
Make sure that the available pressure is not lower than the
head loss of the entire hydraulic system.
The curves in the pictures below shown the available pressure
on the flow from the outdoor unit.
NIMBUS M EXT R32
kPa
90
80
70
60
50
40
30
20
10
1
0
0 500 1000 1500 2000 2500 3000 3500
Fig. l/h43
1 35 M - 50 M
2 80 M - 80 M-T
3 120 M - 120 M-T - 150 M - 150 M-T
It is possible to install a supplementary circulator pump if the
one supplied is not powerful enough. For the electrical connections,
refer to the paragraph "Electrical connections".
a
If thermostatic or zones valves are installed on
all terminals, mount a by-pass to guarantee the
minimum operating flow rate. Consult the table
in the paragraph “Rated and minimum flow rate”.
2
3
Indoor unit head loss
kPa
45
40
35
30
25
20
15
10
5
0
0 500 1000 1500 2000 2500 3000
l/h
Useful head 1 zone
Fig. 44
kPa
90
80
70
60
1
50
40
30
20
10
0
0 500 1000 1500 2000 2500 3000 3500
l/h
1 Zone 1
Fig. 45
It is possible to install a supplementary circulator pump if the
one supplied is not powerful enough. For the electrical connections,
refer to the paragraph "Electrical connections".
a
If thermostatic or zones valves are installed on
all terminals, mount a by-pass to guarantee the
minimum operating flow rate. Consult the table
in the paragraph “Rated and minimum flow rate”.
DHW circuit
The head loss of the primary heater was tested in accordance
with the BS EN 12897:2016 standard and is equal to 3 kPa.
EN / 27