CRONOTERMOSTATO A RELÈ DA INCASSO - Gewiss

Remote control
The time-thermostat has a serial connection for connecting to the GSM GW 90 821 remote
control unit. Using SMS command (e.g. from a cellular telephone) it is possible to:
• set the type of operation (air conditioning/heating)
• set the operating mode (manual/automatic/OFF)
• set the operating set point (MAN mode only)
• request the current status
The device replies to each command SMS sent with a confirmatory SMS (with a predefined,
non-configurable text); the status request message will generate a reply that includes the
following information:
• current type of operation (heating/air conditioning)
• current operating mode (OFF/AUTO/MAN)
• currently set set point temperature
• measured ambient temperature
• output status (ON/OFF)
The symbol is displayed on the VDU whenever the operating type or mode are modified
using the remote control unit.
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Operating in the case of a blackout
The device is fitted with a backup battery that guarantees updating of the time and the day
of the week in the case of a blackout. There is an autonomy of 48 hours under the following
conditions when the power supply is provided exclusively by the battery:
• display time active
• measure and temperature display not active (dashes are displayed)
• backlighting not active
• relay switching not enabled (the relay contact is open)
• front keys not active (except the simultaneous pressing of all four keys). In the absence
of the power supply the simultaneous pressing of all four front keys causes disconnection
of the backup battery inside the device.
This function is used to conserve the efficiency of the battery when the device is not used
for a long period. The battery is automatically reconnected once the device is connected to
the electricity mains network. The set programs are not lost either in the case of a blackout
or in the case of battery disconnection.
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