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Honeywell Sundial RF2 Pack 2 Wireless Timeswitch Product Code: 73241

Sundial RF² Pack 2 Wireless Enabled Programmer with wireless room thermostat. Contains: Wireless enabled programmer (ST9420C) & Wireless room thermostat (DT92E) - Ideal for adding a room thermostat to a traditional system.


  • Digital Display
  • 5-Wire Installation
  • 3 On/Off Periods per Day
  • 3 Pre-Set Programmes
  • 24 Hour, 5 / 2 Day or 7 Day Programmable
  • Frost Protection
  • Holiday Mode
  • EST Approved
  • Energy Saving TPI Control
  • Wireless Enabled Upgrade


Switch/contact rating: 3A. Temperature range: 5-35°C. H x W x D: 99 x 145 x 35mm. 30m straight line transmitter range. Fits industry standard backplate.
Additional Information
Technical Specification
  • Brand : Honeywell
  • Product Height : 99 mm
  • Display Type : Digital Display
  • Product Type : RF2 Pack 2 Wireless Timeswitch
  • Programme Facility : 7 Day, 5/2 Day or 24 Hour Programmable
  • Zoning Level : Up to Two
  • Central Heating Control Type : Control Packs
  • Model Name : Sundial
  • Total Product Weight : 0.54 kg
  • Model No : 2-channel heating pack Y9420H1008
  • Product Width : 145 mm
  • Temperature Range : 5-35 °C
  • Product Depth : 35 mm
  • Pack Size : 1
  • Installation Type : 5-Wire Installation
  • Compatible Boiler Type : All Boilers
  • Manufacturer Guarantee : 1 Year Guarantee
  • Pieces in Pack/Case : 1
Product Contents
1/7 day programmer and backplate, wireless digital room thermostat with stand, 2 x AA batteries and installer/user instructions.
Delivery & Returns


Standard delivery service up to 3 working days: €8.95

Free delivery on all orders over €70.00

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Hopefully you won't need to return an item, however, if you do, it is our aim to make this as simple as possible. By following the guidance below you can help us to help you when a product is not what you expected, or is faulty. Your statutory rights are not affected by this guidance.


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€193.95 Incl. 23% VAT

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Honeywell Sundial RF2 Pack 2 Wireless Timeswitch is rated 5.0 out of 5 by 2.
Rated 5 out of 5 by from Saved a whole lot of trouble.. Cable from old heating thermostat to controller had failed, I dreaded the problems that would be met from trying to replace the cable (carpet up, channelling through plaster). With this Sundial RF2 Pack 2, no need to worry as it's wireless thermostat removed the need for the defunct cable. Quick to install (though I didn't do it!), and very easy to operate. Brilliant!
Date published: 2017-10-10
Rated 5 out of 5 by from Trust Honeywell Just replaced an old programmer & room stat with these paired units for my 78 yr old Mother in law. Took less than 20 mins to change over. Simple to follow instructions & wiring diagrams for all system types. Paired with wireless room stat easily & programming personalized timings was also easy. Best of all, my Mother in law understood the use of the room stat very quickly. Overall another great product from a company I can rely on & so can my customers.
Date published: 2017-09-12
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