Preparing the boiler for operation
49
GB
Hydraulic balancing of heating circuits
The two control valves (Vm and Vr) located on the primary side of the mixed circuit and return side of the direct circuit allow you to adjust the
fl ow between the two circuits.
The module is shipped with the two valves (Vm and Vr) fully open. Adjust the two valves to set the fl ow rate according to your specifi c
requirements.
To change the setting of the valve, open the cap of the valve and turn it clockwise with a screwdriver to decrease the water fl ow. Each turn of
the screw corresponds to a decrease in the fl ow rate of approx. 20%.
After changing the fl ow rate, some boiler settings must be changed as shown in the tables.
CALIBRATION VALVE (Vm)
DIRECT CIRCUIT
FLOW RATE
MIXED CIRCUIT
PRIMARY SIDE
PARAMETER 551
CONDENSING
BOILERS
PARAMETER 551
CONVENTIONAL
BOILERS
turns closing
opening (%)
(%)
(%)
(°C)
(°C)
open
100
46
54
15
20
1
80
44
56
16
21
2
60
40
60
18
23
3
40
30
70
21
26
4
20
10
90
21
26
close
0
0
100
21
26
Equilibrage des débits en fonction de l’ouverture de la vanne de réglage Zone 1
100% = totalement ouverte 0% = totalement fermée.
0
10
20
30
40
50
60
70
80
90
100
Ouv
e
rtur
e/F
ermetur
e v
annes [%]
0
100
200
300
400
500
600
700
800
900
1000
Débit (l/h)
Débit zone 1 [l/h]
Débit primaire zone 2 [l/h]
Meaning of the LEDs
GREEN LED (left)
Indicator light off Main
supply
OFF
Indicator light on
Main supply
ON
Indicator light fl ashing
Main supply ON, operation in manual mode
GREEN LED (centre)
Indicator light off No
BUS
communication
Indicator light on
BUS
communication present
Indicator light fl ashing
BUS
communication initialisation
RED LED (right)
Indicator light off
No operating faults
Indicator light on
Presence of one or more operating faults
Balancing fl ow rates based on the opening of the calibration valve Zone 1
100 % = fully open - 0 % = fully closed
Opening/closing valv
es (%)
Fl
o
w
rat
e
(l/h)
Flow rate zone 1 (l/h)
Flow rate of primary circuit zone 2 (l/h)
