LEGRAND 3440 - Page 511

502
HD4891
L4891
HC4891
N4891
HS4891
NT4891
067271
573716
067272
573717
BUS - SCS
25.5°
2
2
26.3°
+
2
3
4
5
6
7
8
9
10
11
- Temperature control probe mode with external probe - FUN = 3
Warning: the physical conguration can only be performed if the system includes a
99-zone temperature central unit.
An external temperature probe, with the following characteristics, can be connected on
the back of Local Display:
- 10 KΩ at 25 °C BETA 3435
- max. length of the connection 10 metres
Local Display shows the temperature value measured by the external probe, the set
temperature value, and the local selector adjustment. The operations that may be
performed by user are:
- variation of the temperature set using the local selector,
- FAN-COIL speed management,
- operating mode management.
ZA Zone address 0 – 9, Local Display address
ZB Zone address 1 – 9, Local Display address
MOD Mode 0 – 8, Slave probe number
FUN Function 3
For simple systems, where each zone controls at most one heating actuator and one air
conditioning actuator, both of the ON/OFF type, and on a system with only one pump
per function, the con guration of the system can be performed by simply connecting
the con gurators that identify the address of the device and, in case of probe, indicate
the number of slaves present.
For more complex systems, the probe can memorize the actuators to activate, and the
pumps to control on the BUS. The programming operation must be completed directly
from the central unit. The central unit can also be used for the calibration of the probe.
During the system setting stage, it will be necessary to specify the actuators used for
the heating system, and those used for the air conditioning system, as they operate in
a complementary way.
temperature
probe
Functions
A short pressure of keys 8 and 11 can be used to locally change the temperature by
+/-3 °C, in relation to the settings received from the central unit. A short pressure of
key 6 can be used to select the mode of operation, cycling through the OFF, antifreeze/
thermal protection, and automatic statuses respectively. Each mode of operation is
identi ed by a di erent icon. A short pressure of key 2 will force the speed the fan-coils,
cycling through speed 1, 2, 3 or automatic.
Legend
1. Set temperature
2. Fan-Coil adjustment
3. Fan-Coil speed indication
4. Temperature variation indication
5. Fan-Coil operation indication
6. Change operating mode
7. Measured temperature
8. Decrease temperature
9. Operating mode indication
10. System status indication
11. Increase the temperature
Local display
MQ00692-b-EN 17/04/2014