User Manual for Danfoss 102E7 Electronic Mini Programmer

Quick guide from the manual

The Danfoss 102E7 is a 7-day electronic mini-programmer designed to control hot water and heating systems. It offers 3 ON and 3 OFF periods per day. Users can choose between 7-day control (different programs for each day) or 5/2-day control (one program for weekdays, another for weekends). The unit features a battery backup to retain settings during power cuts for up to 2 days.

Installation and Wiring

Warning: This product must be installed by a qualified electrician or competent heating installer in accordance with current IEEE wiring regulations.

Installation Steps:

• Loosen the fixing screw in the base to release the wiring cover.
• Press firmly in the center of the wallplate to slide it apart from the module.
• Fix the wallplate to the wall or plaster box. Ensure screw heads do not protrude beyond the vertical center rib.
• Connect wires according to the wiring diagrams provided in the manual (pages 6-9).
• If the system is 230Vac, terminals 3 and L must be linked with insulated cable.
• Plug the module into the wallplate, ensuring the hook at the top engages with the slot.

Initial Setup and Reset

Before programming, perform a full reset to ensure the unit is in a known state:

• Open the flap on the front of the unit.
• Press and hold the +1HR and MAN buttons.
• Press and release the R/S button using a small, non-metallic object (e.g., a matchstick).
• Release the +1HR and MAN buttons.

To set the time and day, press and hold PROG for 5 seconds to display the year, then use the + or - buttons to adjust. Use the DAY button to toggle between day and month settings.

Programming the Programmer

The unit can be set to 7-day or 5/2-day mode. To convert to 5/2-day mode, remove the small two-way connector from the pins on the rear of the module and press the R/S button.

Programming Steps:

• Press PROGRAMME until SET ON TIME appears.
• Use DAY to select the day(s).
• Use + and - to set the desired ON time.
• Press NEXT ON/OFF to move to the next event.
• Repeat for all events.
• Press PROGRAMME to return to RUN mode.

Operating Modes and Overrides

Use the rocker switch to select WATER/HEATING or WATER ONLY. Press the SELECT button to cycle through modes:

• ON: Heating/hot water remains on constantly.
• OFF: Heating/hot water will not come on.
• AUTO: Follows programmed times.
• ALLDAY: Comes on at the first programmed ON and stays on until the last programmed OFF.

Temporary Overrides:

• +1HOUR: Adds an extra hour of operation. Press again to cancel.
• MAN: Manually overrides the current program (only in AUTO or ALLDAY mode). Press again to cancel.

Battery Backup

The built-in battery retains time and program settings for up to 2 days during a power cut. If power is lost for longer, the unit must be reset using the R/S button and reprogrammed.