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Operating mode
COP mode: Constant pressure regulation
This operating mode allows to maintain a constant pressure in the network over the whole operating range
of the fan. The pressure losses in the network (opening/closing of dampers, dual flow vents...) modify the
pressure in the suction plenum of the ventilation box.
This pressure is measured by a sensor present in the VCHV control box.
This pressure measurement coupled with a regulation loop allows the VCHV to adapt the fan speed to
maintain a constant pressure in the network.
The pressure set point is adjustable from the control buttons of the VCHV control box.
The operation is fully automatic.
This mode of operation is programmed by default on the casing at the factory with a pressure set point of
140 Pa.
0
Airflow (m
3
/h)
Pressure (Pa)
Regulated
pressure setpoint
Max airflow curve
Regulated pressure curve
2.2 Aeraulic curves
JBRB ECOWATT
®
PR VCHV 04
JBRB ECOWATT
®
PR VCHV 06
100%
Qv (m
3
/h)
P (Pa)
stat
Δ
0
0
100
100
200
200
300
300
400
500
42
68
42
69
41
70
100%
P (Pa)
stat
Δ
0
100
200
300
400
0
100
200
300
400
500
600
700
Qv (m
3
/h)
42
75
43
77
45
79
Qv (m
3
/h)
0
0
20
40
60
80
100
100
200
300
400
500
100%
P (W)
abs
100%
0
0
100
50
100
150
200
300
400
500
600
700
Qv (m
3
/h)
P (W)
abs