LEGRAND 3440 - Page 338

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OKC
HC4695
HS4695
L4695
N4695
NT4695
AM5875HD4695
MASTER
PROBE
CENTRAL
UNIT
SLAVE 1
PROBE
SLAVE 2
PROBE
SLAVE 3
PROBE
AVERAGE t = 19.5 °C
t ROOM = 20 °Ct ROOM = 19 °Ct ROOM = 18 °C
t ROOM = 21 °C
Central unit/Master Probe
(HC/HS/L/N/NT4695, AM5875)
Slave 1 probe
(HC/HS/L/N/NT4693)
Slave 2 probe
(HC/HS/L/N/NT4693)
Slave 3 probe
(HC/HS/L/N/NT4693)
Socket Congurators Socket Congurators Socket Congurators Socket Congurators
ZA 4 ZA 4 ZA 4 ZA 4
ZB 7 ZB 7 ZB 7 ZB 7
SLA 3 MOD SLA MOD SLA MOD SLA
SLA 1 SLA 2 SLA 3
Programming
The central unit must be used to set the operating mode of the integrated probe tted
inside. Using the “Conguration” item of the “Maintenance” menu, dene if the zone
should manage a heating system, a cooling system, or a combined one.
Using the same menu item, also select the type of load to control, choosing between:
ON/OFF, OPEN/CLOSE, 3SP FAN-COIL and GATEWAY. When performing programming
operations from the central unit, refer to the installation manual supplied with the
central unit itself.
Master and Slave probe
A probe can operate in conjunction with other probes so that an average temperature
calculation can be performed, based on measurements taken from several points
within the same zone. This function is useful for the management of very large areas,
throughout which the temperature may change consistently
To activate this function, one probe must be congured as “Master”, and one or more
probes must be congured as “Slave” (max 8). The Master probe calculates the average
between its own temperature, and the temperatures measured by the Slave probes, and
then performs the appropriate operations. The integrated probe tted inside the central
unit can only operate as Master. Therefore, for the slave function, only probe item 4693
may be used. In addition to the zone address, in order to congure the integrated probe
as Master it will be sucient to connect a numeric congurator to the SLA socket, which
should indicate the number of Slave probes within the zone, up to 8 maximum.
To congure a Slave probe, connect the congurator marked as SLA to the MOD socket.
Use the SLA socket to progressively assign a number to all Slave probes of the zone.
During this numbering procedure, it is essential to start from no. 1, and that the sequence
is respected, without missing any numbers.
4 zone central unit calibration
The 4 zone central unit does not normally require calibration: however, in particular
installation situations (perimeter walls, north or south facing walls, when close to heat
sources, etc.), the temperature value measured may be corrected using the appropriate
calibration function, which can be found in the central unit menu.
Before performing the calibration operation, ensure the following:
• leave the 4 zone central unit connected and powered with the hydraulic system o for
at least 2 hours. During this time, avoid any changes in the room temperature (e.g. by
opening or closing windows, doors, etc.), and avoid standing near it;
• for the calibration use a calibrated sample thermometer, correctly positioned inside
the room.
Note: For more details on the calibration procedure and the programming operations
using the central unit, refer to the installation manual of the central unit.
4-zone central unit
MQ00178-c-EN 29/04/2014