Secure (Horstmann) H27 XL Series 2 Channel.Plus
Directly replaces earlier H21 / H21XL / H27 / H27XL
* Complete with new backplate
* Channel names can bet set to Heating/HW or Zone1/Zone2
* 2 Channel 7 Day Programmer
* 5 Year manufacturers warranty
* Large easy to follow LCD display
* Backlit display (on button press)
* Pre-Set clock
* Automatic Winter/Summer time changes
* Gravity or Fully Pumped system setting
* Up to 3 on/offs per channel in each 24-hour operation
* One touch programme copying from day to day
* Programmable Holiday setting can be set in advance of departure for any period of time.
* 1 or 2 hour boost and advance on each channel
* Mains powered with battery backup
* Voltage free
* Dimensions: 101x163x33mm HxWxD
* Same backplate as Horstmann 425 and 5 series programmers
Replaces (same backplate and wiring for easy changeover):
Honeywell ST1501 ST1507 ST1000
Horstmann H21 H21XL H27Z H525 H527 H425 Tiara Diadem.
Newlec NL425T NLH21 NLH27 NLE527
Danfoss Randall SET 2, SET2E, SET 3, SET3M, SET 5
Sangamo SET2
Ask a Question about Secure (Horstmann) H27 XL Series 2 Channel.Plus
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There is nothing else that will go onto the existing backplate.
The HCO Code BU098 would be suitable if you can change the backplate.
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It is the advance button on the right hand side.
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No, you will need the H37XL again.
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Hi. It will be tight. You may have to move the backplate just a few mm.
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No, this has the SET type backplate. So backplate replacement would be needed.
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Press the green ‘SET’ buttonUse the ‘+’ and ‘-’ buttons to select ‘SET DEFAULTS’ and press enterUse the ‘+’ and ‘-’ buttons to adjust ‘TIME AND DATE’ and press enterUse the ‘+’ and ‘-’ buttons to adjust THE CURRENT TIME and press enterUse the ‘+’ and ‘-’ buttons to adjust THE DAY and press enterUse the ‘+’ and ‘-’ buttons to adjust THE MONTH and press enterUse the ‘+’ and ‘-’ buttons to adjust THE YEAR and press enterPress the green ‘SET’ button twice
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There is no difference. Horstmann have changed their name to Secure.
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Hi. This is a dual channel programmer, so is not suitable to replace the Sunvic 107XLS.
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If the room thermostat is turned down, then it won't be the programmer at fault, as it cannot over-ride the thermostat. It sounds like a stuck motorised valve.
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It will plug on, but the backplate is in a different place, so you will either need some clearance to the left of the existing H525 to to move the backplate across.
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Hi Yes it will. A very simple swap.