Image is for illustration only and should not be relied upon Siemens (Landis and Staefa) RWB27Si Timeswitch

Siemens (Landis and Staefa) RWB27Si Timeswitch

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£43.75

Ex VAT: £36.46

Brand: Siemens (Landis & Staefa/Gyr)

HCO Code: 09D01

Availability: In Stock

The RWB27 offers customers unique menu programming allowing settings to be made in a quick easy and efficient way.

The devices offer the following features
* Complete with new backplate
* Unique menu driven programming
* Easy to read larger than average backlit display
* Simple operation
* Up to 3 hour boost facility
* 2/3 on/offs
* Holiday programming
* Universal programming - daily weekend/weekday 7 day
* Battery back-up
* 6(2)A SPDT Volt-Free contacts
* Dimensions 90x145x34mm HxWxD

Replaces (same backplate & wiring for easy changeover):
Landis & Gyr / Landis & Staefa RWB30, RWB30E, RWB50, RWB100, RWB152, RWB 152cw, RWB170, RWB7, RWB-XT, RWB27
Landis & Gyr Microgyr 30, 30E, 50, 100, 152, 152cw, 170, 7, XT.
Boss Therm RT7, RT24, BUT, RTF7
British Gas EMT1
Wickes RWB7.cw, RWB152.cw

Replaces (same backplate but requires a link from terminal 2 to L on the backplate):Landis & Gyr / Landis & Staefa RWB3

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Is CR 2032 the right battery Answers1

Yes it is.

Can I replace a siemans rwb27 with a rwb 27i Answers1

Yes, it will be a direct replacement.

Hi there, we have Siemens REB27Si Timeswitch installed in our flat before we moved in; how can we reset or turn it off the boiler service interval reminder? I got boiler engineer came for the service, but he didn’t know how to do it too. Please advise, many thanks! Answers1

Hi. You will need to contact Siemens on 0330 2221996. You will likely need to provide proof that you own the flat rather then renting it from a landlord. If you do rent the flat, then you will need to contact your landlord.

Hi there, I have a BossTherm that just says that on bottom left and BUP bottom right. I have some photos I could send to see if this would fit. Thanks for your help, Jim Graham. Answers1

Hi This is not suitable to replace the Boss Therm BUP. You need the RWB29Si.

As I want an easy fix solution [plug & play] - Is the RWB27 a direct replacement for the Landis & Gyr RWB30, i.e. utilizing the original back plate / fixings, plug in method connections, and original house wiring. For additional info - The original boiler is a Myson Economist WM30 / 40 with separate 3 way motorised valve, Immersion Tank c/w stat and a room stat. Answers1

Yes the RWB27 would do that. It's a very easy 10-minute job.

Can I replace a REV11 with this thermostat Answers1

No. I would recommend the RDE10.1 (HCO code 25A01).

How exactly do you turn the timeswitch from 2 on/offs to 3 on/offs? I cannot see this explained in the instructions. Answers1

There is a switch on the back of the unit. You will need to press the reset button on the front after changing it. Make sure you switch off the electric before removing it from it's backplate.