LEGRAND 3440 - Page 512

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HD4891
L4891
HC4891
N4891
HS4891
NT4891
067271
573716
067272
573717
- Temperature control probe mode with probe - FUN = 4
Warning: physical conguration can only be used if a 99-zone temperature control
central unit is installed in the system
This mode is dierent from the previous one in the fact that the external probe is not
connected to Local Display. Being unable to autonomously establish the temperature,
it must be associated to at least one probe. The user is shown the temperature value
measured by the associated probes, the set temperature value, and the adjustment of
the local selector.
The possible operations for the user are the adjustment of the set temperature using
ZA Zone address 0 – 9, probe address
ZB Zone address 1 – 9, probe address
MOD Mode 1 – 8, Slave probe number
FUN Function 4
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.
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.
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.
the local selector, and the change of status of the probe. In this mode, the parameters
that can be congured are the local display address (which must coincide with the
ZA/ZB address of the associated probe), the type of control of the pump, the type of
mode, and the number of slave probes.
Example of conguration of a zone (address 47) with Local Display and probe
Local Display Probe Slave
Socket Congurator Socket Congurator
ZA 4 ZA 4
ZB 7 ZB 7
MOD 1 MOD SLA
FUN 4 SLA 1
Slave
probe
Local
display
Local display
MQ00692-b-EN 17/04/2014