H425 horstmann diadem manual

Horstmann diadem replacement. * Same backplate as Horstmann and 5 series programmers. Replaces (same backplate and wiring for easy changeover): Honeywell ST ST ST Horstmann H21 H21XL H27Z H H H Tiara Diadem. Newlec NLT NLH21 NLH27 NLE Danfoss Randall SET 2, SET2E, SET 3, SET3M, SET 5 Sangamo SET2. The Horstmann Tiara and Diadem programmers are 2 circuit central heating and hot water programmers able to switch ON and OFF twice every 24 hours. An advance switch is provided to make temporary overrides to the ON or OFF periods and a selector switch gives a further choice of programmes. Horstmann Tiara/Diadem Electro-mechanical Programmers.

The Diadem is ideal for gravity systems and fully pumped systems with spring return zone valves. A new backplate is included with the Diadem. Compatible alternatives with same backplate wiring: Horstmann H21XL - 24 Hour digital programmer with boost holiday 5 year warranty. Horstmann H27XL - 7 day digital programmer with boost holiday. The Horstmann Tiara and Diadem programmers are 2 circuit central. heating and hot water programmers able to switch ON and OFF twice. every 24 hours. An advance switch is provided to make temporary. overrides to the ON or OFF periods and a selector switch gives a further. POTTERTON PROGRAMMER EP INSTALLATION MANUAL, SET3M H TIARA H DIADEM. Potterton ep1 single channel programmer, plumbnation.

View online (6 pages) or download PDF (3 MB) Horstmann Tiara, Coronet, Diadem Installation guide • Tiara, Coronet, Diadem PDF manual. I have an oil heating system, hence taking a look at it myself as there is no installation available from Hive. I am looking for some advice. it says it is a direct replacement for the Diadem. However on checking mine I find that it is a Coronet. Is this still the replacement.