GW21825 - Digital timer switch Gewiss - Free user manual and instructions

Product type	Digital time switch
Brand	Gewiss
Model	GW21825
Power supply	230 V AC (mains); rechargeable battery ML 1220 (backup)
Dimensions	2 modules (standard width, compatible with Playbus or System)
Display	Backlit LCD with icons
Operating modes	Automatic, Manual, Stop (OFF)
Programming	Daily and weekly; 5-minute resolution; up to 12 switching operations per hour
Relay output	1 NO/NC, potential-free, 8A (AC1) / 4A (AC15), 250 V~
Remote control	Via GSM system GW90821 (SMS)
Battery life	Approximately 24 hours (in case of power failure)
Backlight	Activated 5 seconds after each press, permanent in SET/PROG mode
Mounting	Flush-mounted with plates and 2-module supports
Compliance	IEC 60364 / HD 60364, national standards for low-voltage installations
Operating temperature	Domestic environment free of dust
Maintenance	No special maintenance required; replace battery if necessary
Spare parts	Rechargeable battery (reference ML 1220)

Frequently Asked Questions - GW21825 Gewiss

How to set the time and day on the timer?

Press the SET/PROG button once to enter settings mode. The day flashes: use the ^ or v buttons to select it, then press MODE to confirm. Repeat for the hour and minutes. Exit occurs automatically after 30 seconds of inactivity.

How to program switching schedules?

Press SET/PROG twice to enter PROG mode. Select the day with ^/v and confirm with MODE. Then set the start time of the switch, then choose ON or OFF for the relay state. You can define up to 12 switching operations per hour with a 5-minute step. Confirm with MODE and move to the next day.

How to copy a program from one day to another?

After programming a day, press both ^ and v buttons simultaneously within 30 seconds. The program is copied to the next day. Repeat to copy over several days.

What to do in case of a power outage?

The device is equipped with a backup battery that maintains the time and day for approximately 24 hours. The stored programs are not lost. If the device remains unused for a long time, you can disconnect the battery by pressing all 4 front buttons simultaneously.

How to use remote control via GSM?

The timer can be connected to the remote control system GW90821. You can send SMS to change the mode (MAN/AUTO/OFF), the output state (ON/OFF) or request the current state. A confirmation SMS is sent back. The corresponding icon is displayed.

What do the icons on the screen mean?

The screen displays: the time profile (graphic), the relay state (ON/OFF), the day, the time, the mode (MAN/AUTO/OFF), and possibly a remote control icon. In AUTO mode, the current half-day profile (AM/PM) is visible.

How to switch to manual mode?

Press the MODE button several times until 'MAN' appears on the screen. Use the ^ or v buttons to force the relay state (ON or OFF). The state remains fixed until you change the mode.

What is the capacity of the relay output?

The relay has a changeover contact (NO/NC) potential-free. It can switch up to 8A in AC1 (resistive load) or 4A in AC15 (inductive load) at 250 V~.

How to install the timer?

Mount the device on a 2-module support (Playbus or System). Connect the power supply (phase L, neutral N) and the load to the relay terminals (1: NO, 2: NF, 3: common). If using remote control, connect the serial terminals (4: TX, 5: GND, 6: RX). Follow applicable electrical standards.

How to replace the internal battery?

Remove the small cover as indicated in the manual (figure A). Use a small screwdriver to extract the battery (figure B). The replacement battery is a ML 1220 rechargeable. Make sure to follow the WEEE directive for disposal.

USER MANUAL GW21825 Gewiss

Warning! The safety of this appliance is only guaranteed if all the instructions given here are followed scrupulously.

These should be read thoroughly and kept in a safe place.

System-Playbus products can be installed in environments which are dust-free and where no special protection against the penetration of water is required.

They shall be installed in compliance with the requirements for household devices set out by the national standards and rules applicable to low-voltage electrical installations which are in force in the country where the products are installed, or, when there are none, following the international standard for low-voltage electrical installations IEC 60364, or the European harmonization document HD 60364.

GEWISS sales organization is ready to provide full explanations and technical data on request.

CONTENTS

USER INSTRUCTIONS

• General description 20
• Control description 21
  -Operating modes 22
• Setting parameters 23
• Programming 24
• Automatic operation 26
• Manual operation 26
  -Visual display unit. 27
• Remote control 27
  -Operating in case of blackout 28
• Preset parameters 28

INSTALLATION INSTRUCTIONS

Assembly 29
- Terminal description 30
- Battery removal 30

FUNCTIONAL FEATURES/TECHNICAL DATA 31

General description

The programmer is used for the timed management of a load, with programming on a daily and weekly basis using a relay output.

The programmer is fitted with a backlighted LCD visual display unit (VDU) and four control buttons for managing the device.

Control description

USER INSTRUCTIONS		Symbol
①	MODE: select mode	MODE
②	Increment/Select parameters
③	Decrement/Select parameters
④	SET/PROG: Set programs/Programming	SET/PROG
VDU SIGNALS
⑤	Daily program profile
⑥	Relay status (ON/OFF)
⑦	Command signal by GSM remote control unit (via SMS)
⑧	Day
⑨	Time
⑩	Operating mode	OFF MAN AUTO

Warning: at switch-on the programmer carries out a self-diagnosis of approximately 15 seconds displaying all the icons on the VDU.

Operating mode

The programmer provides three different operating modes:

• MANUAL
• AUTOMATIC
• OFF

The MODE key is used to switch from one mode to another.

In manual mode it is possible to set the output in a permanent state. The time, the day of the week, the message MAN and the indication of the relay status (ON/OFF) are displayed on the VDU.

In automatic mode the device uses a program set by the user, which can also be differentiated for each day of the week. The time, the day of the week, the message AUTO and the current relay status (ON/OFF) are displayed on the VDU. The message AM or PM shows which fraction of the day is displayed in the hourly profile.

The segment relative to the current time blinks in the hourly profile with the representation of the status of the output (high segment ON, low segment OFF).

In OFF mode the N.A. relay contact is kept constantly open while the N.C. contact is closed.

The time, the day of the week and the message and indication of the relay status (OFF) are displayed on the VDU.

Setting parameters

The SET/PROG key is pressed once to set the parameters.

The message SET is displayed on the VDU.

At this point the following can be modified, in sequence:

• the day of the week
  the hour
  the minutes

The value of each parameter is confirmed by pressing the MODE key.

The setting phase is exited by pressing the SET key again or, in automatic mode, 30 seconds after the last key entry.

Setting the day of the week

When the day of the week bar blinks, select the day of the week using the keys(Monday=1, Tuesday=2....

Sunday=7).

The value set is confirmed by pressing the MODE key within 30 seconds.

Setting the hour

When the hour figures blink, set the hour using the AV keys.

The values set are confirmed by pressing the MODE key within 30 seconds.

Setting the minutes

When the minutes figures blink, set the minutes using the keys.

The values set are confirmed by pressing the MODE key within 30 seconds.

Programming

The SET/PROG key is pressed twice to personalise the preset daily/weekly program or to make a modification to a previously set cycle.

a) The message PROG is displayed on the VDU while the bar for the first day of the week starts to blink.

The required day is selected with the

The selection is confirmed by pressing the MODE key within 30 seconds.

b) The profile of the day selected is displayed on the VDU.
c) The time starts to blink.

The keys are used to select the start hour from which it is required to modify the proposed profile; while the time profile is being incremented, the column relative to the selected time will blink. The selection is confirmed by pressing the MODE key within 30 seconds.

The message ON (or OFF) blinks on the VDU. The key can be used to modify the output status, The modification takes effect starting from the time selected and extends until the next transition or until the end of the day that is being programmed if there are no subsequent transitions.

The choice is confirmed by pressing the MODE key within 30 seconds.

Programming

e) The time blinks, select the start hour from which it is required to select a new switch as described in point c).

The time is incremented/decremented in steps of 5 minutes each time the keys are pressed.

It is therefore possible to define up to 12 relay switches every hour.

The programming is confirmed by prolonged pressure on the MODE key.

A move is made automatically to programming the next day.

The programming phase is exited by pressing the SET key or, in automatic mode, 30 seconds after the last key entry.

Save and propose again

If, however, it is required to copy the program directly to the next day, the programming just done is confirmed by pressing the keys simultaneously 30 seconds.

In this mode the program just run is saved and also proposed again the next day; to copy and save the same program over several days, repeat the operation of simultaneously pressing the key within 30 seconds.

On completion of weekly programming the SET/PROG key is pressed to return to normal operating.

Automatic operation

The program is started by selecting automatic mode by pressing the MODE key until the AUTO symbol is displayed on the VDU.

In AUTO operating mode the hourly profile relative to the fraction of the day in progress (AP/PM) is displayed.

The profile relative to the other fraction of the day can be displayed by pressing the AV keys simultaneously. The indication is active for 5 seconds, after which the current profile reappears.

Manual operation

The manual operating mode activated by pressing the MODE key until the MAN message is displayed on the VDU.

The keys are used to set the required output status. The selected status (ON/OFF) is displayed on the VDU.

Visual display unit

The LCD visual display unit is provided with backlighting which is active for 5 secs whenever a key is pressed.

In SET or PROG mode the backlighting remains active during parameter setting and programming. It is deactivated on exit from these modes.

Remote control

The programmer can be connected to the GW90821 GSM remote control unit using a serial connection. SMS commands (e.g. from a cellular telephone) can be used to:

• Set the operating mode (MAN/AUTO/OFF)
• Set the output status (ON/OFF)
• Request the current status

Each command SMS sent to the device will be answered by a corresponding SMS in confirmation (with non-configurable predefined text); the status request message provides a reply including the following information:

• current operating mode (OFF/AUTO/MAN)
• output status (ON/OFF)

Whenever the output status or operating mode are modified from the remote control unit, the symbol is displayed on the VDU.

The symbol also appears for the current contact status request.

The symbol remains displayed on the VDU until a key is pressed.

Operating in case of blackout

The device is fitted with a backup battery that guarantees updating of the time and day of the week in case of blackout.

When power is supplied by the battery alone there is an autonomy of 24 hours in the following conditions:

time display active
- backlighting inactive
- output status display inactive
- relay switching not enabled (the relay contact retains the status prior to the blackout)
- front keys inactive (except when all 4 keys are pressed simultaneously)

In the absence of power, simultaneously pressing all four front keys causes disconnection of the backup battery inside the device.

This function is used to preserve the efficiency of the battery when the device is not used for a long period.

The battery is connected again automatically once the device has been connected to the power mains.

The set programs are not lost either in the case of a blackout or in that of battery disconnection.

Preset parameters

Day of the week	1: Monday
Time	00:00
Output status (MAN mode)	OFF (MAN)

INSTALLATION INSTRUCTIONS

Assembly

Example of installation using plates and 2 module supports (Playbus for GW30413 or System for GW20825 -GW21825)

Terminal description

Cabling terminals

Power supply

L - Phase

N - Neutral

Output relay

1 - NA contact
2 - NC contact
3 - Common

Serial line

4 - TX (output data)
5 - GND (common)
6 - RX (input data)

Battery removal

In case of necessity (e.g. having to dispose of the device, as laid down by the WEEE standards), the programmer's battery is accessible by removing the cover as shown in figure A. The use of a small screwdriver is recommended for extracting the battery as shown in figure B.

TECHNICAL DATA

Operating modes

Time programming resolution

Max. n^ of settable relay switches

Remote control

Output contact

Power supply

Dimensions

Automatic, manual, off

5 minutes

12 per hour

With GW 90821 GSM remote control unit

Relay, without potential

1 NA/NC 8A (AC1)/4A (AC15), 250Vac

Mains (230V ac) - normal operation

Rechargeable battery (ML1220) - mains blackout

2 Playbus or System modules

FRANÇAIS

ATTENTION - IMPORTANT

Programmation minutes

Automatisch, manuell, off.

5 Minuten

12 in der Stunde

According to article 9 paragraph 2 of the European Directive 2004/108/EC and to article R2 paragraph 6 of the Decision 768/2008/EC, the responsible for placing the apparatus on the Community market is:

Gewiss S.p.A Via A. Volta, 1-24069 Cenate Sotto (BG) Italy Tel: [phone] Fax: [phone] E-mail: [e-mail]