300
5739 18 (White)
5739 19 (Magnesium)
067456
3550
System with two circulation pumps
The system shown requires two circulation pumps that serve two dierent zone groups
controlled by their own solenoid valves. The rst group pump is managed by a dedicated
actuator congured in zone 00 with progressive number equal to 1 (N=1). Also the two
valves that control ZONE1 and ZONE2 are managed by their own actuators.
The circulation pump will remain active until at least one of the two valves remains open
and will stop when both valves are closed. The second group is similar to the rst one,
but the actuator controlling the pump of zones 3 and 4 is congured in zone 00 with
progressive number equal to 2 (N=2). Although belonging to the same system, the two
pump/solenoid valve groups are totally independent from each other (see also actuator
conguration).
Legend
1. zone 1 and 2 circulation pump
2. pump actuator
3. zone 3 and 4 circulation pump
4. pump actuator
5. zone 1 solenoid valve
6. zone 1 actuator
7. zone 2 solenoid valve
8. zone 2 actuator
9. zone 3 solenoid valve
10. actuator zone 3
11. zone 4 solenoid valve
12. actuator zone 4
ZONE 1
BUS
ZONE 2
ZONE 3
ZONE 4
99-zone central unit
MQ00187-c-EN 29/04/2014
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