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Honeywell Sundial RF2 Pack 2 Wireless Timeswitch (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

More Info

£159.49INC VAT

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Has anyone experienced the fan on their gas cooker coming on when the heating is activated using wireless controls?

This has happened twice, I switched the heating on while upstairs and when I came down the fan was running on the cooker.
Asked by: Anneo

How does this unit interract with an existing thermostat or does it override that?

I have a faulty ST9400C and plan to replace it with this unit. There is an existing thermostat and boiler stat with two-way motorised valve - any problems?
Asked by: Anonymous
The RF2 Pack 2 has an ST9420 programmer, which can communicate wirelessly with the supplied thermostat. The ST9400C requires a hard wired thermostat. If the ST9400C is replaced with this unit then some wiring alterations will be required to make use of its features.
Answered by: Honeywell Tech Support
Date published: 2017-03-31
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Brand Honeywell
Central Heating Control Type Control Packs
Compatible Boiler Type All Boilers
Display Type Digital Display
Installation Type 5-Wire Installation
Manufacturer Guarantee 1 Year Guarantee
Model Name Sundial
Model No 2-channel heating pack Y9420H1008
Pack Size 1
Pieces in Pack/Case 1
Product Depth 35 mm
Product Height 99 mm
Product Type RF2 Pack 2 Wireless Timeswitch
Product Width 145 mm
Programme Facility 7 Day, 5/2 Day or 24 Hour Programmable
Temperature Range 5-35 °C
Total Product Weight 0.54 kg
Zoning Level Up to Two

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.

Product contents

1/7 day programmer and backplate, wireless digital room thermostat with stand, 2 x AA batteries and installer/user instructions.


Instruction Manual