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Horstmann's best selling, big value 425 Series
programmers are the simplest way to control hot
water and central heating in the home.
Easy to understand and set.
The dial shows settings at a glance, with an
instantly recognisable layout and red and blue
ON/OFF indicators.
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Simple to use with easily
understood settings adjusted in seconds
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Advance control to allow
manual override switching ON or OFF
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Easy to install, with the
units plugging into a 9 way standard backplate
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Gives real comfort throughout
the home
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Reduces heating costs
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Greatly increased
energy savings
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Single
Circuit
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Twin
Circuit
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Permanent
ON / OFF
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On
all day
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On/Off
twice a day
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Combi-
Boiler
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Pumped
Systems
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Gravity
Systems
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Independent
CH / HW
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Immersion
Heaters
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Indicator
Lights
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425
Diadem |
425
Tiara |
425
Corenet |
425 Diadem ( To order P.O.A )
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| Contact rating |
Double circuit 6(2.5)
A 230V AC |
| Contact Type |
Micro-disconnection changeover
Voltage free (Tiara Only) |
| Motor |
Synchronous 230V 50Hz
Double insulated |
| Power consumption
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2.5W |
| Dirt Protection |
Normal situations |
| Moisture protection
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Ordinary |
| Dimensions Enclosure
protection |
IP20 |
| Maximum operating
temperature |
55ºC |
| Dial setting |
2 ON, 2 OFF tappets
Min. ON/OFF period 45 mins |
| Dimensions |
152mm x 107mm x 39mm |
| Mounting Wall |
Fixing plate to Standard
9
Pin |
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| Contact rating |
Single circuit 16 (6)
A 230V AC |
| Contact Type |
Micro-disconnection changeover
Voltage free |
| Motor |
Synchronous 230V 50Hz
Double insulated |
| Power consumption
|
2.5W |
| Dirt Protection |
Normal situations |
| Moisture protection
|
Ordinary |
| Dimensions Enclosure
protection |
IP20 |
| Maximum operating
temperature |
55ºC |
| Dial setting |
2 ON, 2 OFF tappets
Min. ON/OFF period 45 mins |
| Dimensions |
152mm x 107mm x 39mm |
| Mounting Wall |
Fixing plate to Standard
9
Pin |
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425 Diadem
This twin circuit, hot water and central heating
programmer, with indicator lights, has 16 programmes
available for fully pumped systems, including
independent programming of heating and hot water
and 10 programmes
for gravity HW/pumped CH systems. Programmes allow
permanently ON or OFF, On all day or ON/OFF twice
a day. An advance switch gives temporary override
without altering settings.
The Diadem is ideal for gravity systems and fully
pumped systems with spring return zone valves.
425 Tiara
The Tiara has all the programme 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 zone or mid-position
valves.
425 Coronet
A single circuit timeswitch for straightforward,
accurate time control. The 425 Coronet is particularly
suitable for combi-boiler systems, warm air systems
and extra zone control. Four programmes offer
permanently ON or OFF, On all day or ON/OFF twice
a day. An advance switch allows temporary override
without altering settings.
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