Danfoss 102E5 Installation And User Manual
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Danfoss 102E5 Installation And User Manual

Electronic mini-programmer for controlling hot water and heating (including factory replacement units fru)
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102E5
Electronic mini-programmer for
controlling hot water and heating
(Including Factory Replacement Units FRU)
Installation and User Guide
Danfoss Heating

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Nigel Youngman
February 1, 2025

why wont my boiler start and go off via the time clock it is set to auto

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1 comments:
Mr. Anderson
February 10, 2025

Your Danfoss 102E5 boiler may not be starting and stopping according to the timer set to auto due to several possible reasons:

1. Incorrect Programming – Verify that the programmed ON and OFF times are correctly set.
2. Manual Overrides Active – Check if the +1HOUR or ADVANCE override buttons are activated, as they can temporarily alter the schedule.
3. Unit Set to OFF – The ADVANCE function does not work if the unit is set to OFF, so ensure it is in AUTO mode.
4. Power Supply Issues – Confirm that the unit is receiving power (230V supply).
5. Wiring Issues – Ensure all wiring connections, including zone valves and thermostats, are properly connected.
6. Battery Backup Failure – If there is a battery backup issue, the unit may lose programmed settings and not function as expected.
7. Faulty Unit – If the above checks do not resolve the issue, the unit itself may be faulty and require inspection or replacement.

Check these factors to diagnose the issue and restore proper operation.

This answer is automatically generated

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Summary of Contents for Danfoss 102E5

  • Page 1 102E5 Electronic mini-programmer for controlling hot water and heating (Including Factory Replacement Units FRU) Installation and User Guide Danfoss Heating...

  • Page 2: Table Of Contents

    Certification Mark Danfoss can accept no responsibility for possible errors in catalogues, brochures, and other printed material. All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.

  • Page 3: Product Specifi Cation

    Installation Instructions Please Note: This product should only be installed by a qualifi ed electrician or competent heating installer, and should be in accordance with the current edition of the IEEE wiring regulations. Product specifi cation Specifi cation Power supply 230 ±...

  • Page 4: Installation

    Installation NB. For FRU units - go straight to point 6 below. 1. Loosen the fi xing screw in the base of the unit to release the Wiring Cover. 2. Holding the unit face downwards, press fi rmly in the centre of the wallplate and slide it apart and lift it from the module.
  • Page 5 5. Electrical connections are simplifi ed by using a Wiring Centre. However, if this is not used, the wallplate terminal identifi cation is as shown. Water Heating Mains Supply (via 3 amp fuse) If the system being controlled is 230Vac then terminals 3 and L must be linked with insulated cable capable of carrying full load current.

  • Page 6: Wiring

    10. Then press the SELECT button until the bar lines up with the word OFF and check the system does not operate. 11. Set the rocker switch to WATER ONLY. Press the SELECT button until the bar in the display lines up with the word ON and check that the water circuit only operates.
  • Page 7 3 AMP CALL BOILER PUMP TERMINALS TERMINALS Typical domestic gas or oil-fi red central heating system with gravity hot water and pumped heating. (If a room thermostat is not used, wire pump live directly to terminal 2 of the 102E5).
  • Page 8 ORANGE BROWN BOILER & MID-POSITION VALVE PUMP TERMINALS The above control system is available as the Danfoss Randall 102E5 HEATSHARE pack, which also includes the TW room thermostat, AT cylinder thermostat, HS3 mid- position valve and a WB12 wiring box.
  • Page 9 VALVE D.H.W VALVE BOILER & PUMP TERMINALS The above control system is available as the Danfoss Randall 102E5 HEATPLAN pack, which also includes the TW room thermostat, AT cylinder thermostat, two 22mm HPP zone valves and a WB12 wiring box.

  • Page 12: Your Programmer

    Your 102E5 mini-programmer allows you to switch your heating and hot water on and off at times that suit you. The 102E5 can provide 3 ON periods and 3 OFF periods each day and can offer either 24 hour control (same...

  • Page 13: Setting The Clock

    Before you start  Open the fl ap on the front of the unit.  Press all four buttons (SELECT / ADVANCE / + / -) at the same time This will reset the unit, reinstate PROGRAMME the preset programmes and set the time to 12:00pm on Monday.

  • Page 14: Factory Preset Programmes

    Factory Presets The unit is supplied with the following preset programme which will be active after the unit has been reset. Mon-Fri or All Sat-Sun* days in 24hr mode (5/2day mode only*) 1st ON 6.30am 7.30am 1st OFF 8.30am 10.00am 2nd ON 12.00pm 12.00pm...

  • Page 15: Setting The Programme - 24 Hour

    Programming event times in 24 hour mode You can programme your heating and hot water to come on and go off up to 3 times each day, to suit your requirements.  Press PROGRAMME until 1 (Event 1) shows along the top of the display.

  • Page 16: Setting The Programme - 5/2 Day

    Programming event times in 5/2 day mode You can programme your heating and hot water to come on and go of up to 3 times each day, to suit your requirements, with one set of programmes for weekdays and a different set of programmes for the weekend.

  • Page 17: Running The Programme

    Running your programme The 102E5 will either control your hot water and heating together, or just your hot water (i.e. during the summer, when heating is no longer required). To make your selection use the rocker switch under the LCD display to select either WATER/HEATING or...

  • Page 18: Temporary User Overrides

    Temporary User Overrides Sometimes you may need to change the way you use your heating temporarily, i.e due to unusually cold weather. The 102E5 has two convenient overrides which can be selected without affecting the set programme. Override buttons +1HOUR ...

  • Page 19: Battery Backup

    Battery backup In the event of a power cut, the built-in lithium battery will keep your time and programme settings for up to 15 days. After 15 days without mains power the unit will switch off and two dots will show in the display. However all your programmed on/off times will be remembered.

  • Page 20: Contact Details

    Tel: Visit our website: www.heating.danfoss.co.uk Email our technical department: ukheating.technical@danfoss.com Call our technical department 01234 364 621 (9.00-5.00 Mon-Thurs, 9.00-4.30 Fri) Danfoss Ltd Ampthill Road Bedford MK42 9ER Tel: 01234 364621 Fax: 01234 219705 Part No 2467v04 Issue 4 01/15...

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