Meanin Of The Leds; Hydraulic Balancing Of Heating Circuits - CHAFFOTEAUX MCD IV Instrucciones De Instalación Y El Uso

Meaning of the LEDs
GREEN LED (left)
Indicator light off
Indicator light on
Indicator light fl ashing
GREEN LED (centre)
Indicator light off
Indicator light on
Indicator light fl ashing
RED LED (right)
Indicator light off
Indicator light on

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.
Equilibrage des débits en fonction de l'ouverture de la vanne de réglage Zone 1
100% = totalement ouverte 0% = totalement fermée.
100
90
80
70
60
50
40
30
20
10
0
CALIBRATION VALVE (Vm)
turns closing opening (%)
open
1
2
3
4
close
Main supply OFF
Main supply ON
Main supply ON, operation in manual mode
No BUS communication
BUS communication present
BUS communication initialisation
No operating faults
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
Flow rate zone 1 (l/h)
Débit zone 1 [l/h]
DIRECT CIRCUIT
FLOW RATE
(%)
100 46
80 44
60 40
40 30
20 10
0 0
Preparing the boiler for operation
Flow rate of primary circuit zone 2 (l/h)
Débit primaire zone 2 [l/h]
MIXED CIRCUIT PARAMETER 551
PRIMARY SIDE CONDENSING
BOILERS
(%) (°C)
54 15
56 16
60 18
70 21
90 21
100 21
GB
1000
900
800
700
600
500
400
300
200
100
0
PARAMETER 551
CONVENTIONAL
BOILERS
(°C)
20
21
23
26
26
26
49