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Product at a glance

Electro-mechanical Programmer

Our 425 series of mechanical programmers are the simplest way to control hot water and central heating in the home.

The Tiara has all the capability and features of the 425 Diadem, but without the indicator lights. The Tiara is ideally suited for both gravity systems and fully pumped systems with either mid-position or zone valves.

Application

  • Control of most domestic gas or oil-fired central heating and hot water systems.
  • Combination (‘combi’) boiler systems
  • Stored hot water systems
  • Solid-fuel systems
  • Additional zone control

Benefits

  • Simple to use with easily understood settings adjustable in seconds
  • All control elements are visually accessible
  • Allows the user to switch the heating off or on early, without disturbing any existing settings
  • Advanced controls to allow manual overide on or off
  • Allows the user to pre set a choice of programmes
  • Coronet can be used for loads up to 3kw as well as conventional heating

Features

  • Rotating 24-hour dial and tappet arrangement
  • Easy to install using a 9-pin backplate
  • Advance control to allow manual override ON or OFF
  • Programme options: On, Off, All day or Auto
  • 7 years no quibbles warranty

Technical specifications

Electrical
Contact rating Double circuit 6 (2.5) Amps 230V AC
Contact type Micro-disconnection changeover voltage-free
Motor Synchronous 230V 50Hz double insulated
Power consumption 2.5W
Environmental
Dirt protection Normal situations
Moisture protection Ordinary
Enclosure protection Ip20
Maximum operating +55°C
Temperature dial setting 2 On, 2 Off tappets, Min. On/Off period 45 mins
Mechanical
Dimensions 152 x 107 x 39mm
Mounting 9-pin wall fixing plate
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