…an explanation for householders
A programmable room thermostat is both a programmer and a room thermostat. A programmer allows you to set ‘On’ and ‘Off’ time periods to suit your own lifestyle. A room thermostat works by sensing the air temperature, switching on the heating when the air temperature falls below the thermostat setting, and switching it off once this set temperature has been reached. So, a programmable room thermostat lets you choose what times you want the heating to be on, and what temperature it should reach while it is on. It will allow you to select different temperatures in your home at different times of the day (and days of the week) to meet your particular needs. Turning a programmable room thermostat to a higher setting will not make the room heat up any faster. How quickly the room heats up depends on the design of the heating system, for example, the size of boiler and radiators. Neither does the setting affect how quickly the room cools down. Turning a programmable room thermostat to a lower setting will result in the room being controlled at a lower temperature, and saves energy. The way to set and use your programmable room thermostat is to find the lowest temperature settings that you are comfortable with at the different times you have chosen, and then leave it alone to do its job. The best way to do this is to set low temperatures first, say 18oC, and then turn them up by one degree each day until you are comfortable with the temperatures. You won’t have to adjust the thermostat further. Any adjustments above these settings will waste energy and cost you more money.
If your heating system is a boiler with radiators, there will usually be only one programmable room thermostat to control the whole house. But you can have different temperatures in individual rooms by installing thermostatic radiator valves (TRVs) on individual radiators. If you don’t have TRVs, you should choose a temperature that is reasonable for the whole house. If you do have TRVs, you can choose a slightly higher setting to make sure that even the coldest room is comfortable, then prevent any overheating in other rooms by adjusting the TRVs. The time on the programmer must be correct. Some types have to be adjusted in spring and autumn at the changes between Greenwich Mean Time and British Summer Time. You may be able to temporarily adjust the heating programme, for example, ‘Override’, ‘Advance’ or ‘Boost’. These are explained in the manufacturer’s instructions.
Programmable room thermostats need a free flow of air to sense the temperature, so they must not be covered by curtains or blocked by furniture. Nearby electric fires, televisions, wall or table lamps may prevent the thermostat from working properly.
The Digistat +2RF thermostat is a programmable thermostat 24-Hourproduct (the same program for every day of the week) which allows you to set up to 6 time and temperature events per day.
Clock Setting
Your Digistat +2RF is fitted with a real-time clock, which is pre-set at the factory. You will not have to alter the time settings. A special feature of this real-time clock is to automatically update the time during the summer/winter time change removing the need to manually alter the clock.
General Operation
With the unit in Auto mode (the small arrow to bottom of screen will point to Auto) the temperature can be changed for a short time by using the + or – buttons. Changing the temperature in this way will keep the Digistat +2RF set to your new temperature until the next pre-programmed event (at which time it will revert to programmed temperature). The temperature you are setting will flash on the screen. Once temperature is set, the unit will revert to showing the current temperature. The indicator will show on the screen if the heating is turned on.
A flashing flame indicates the product is in intelligent delayed start mode (see special note).
When the batteries start to run low a battery icon will flash in the display, to indicate “low battery” during this time the Digistat +2RF will function normally (see fig 1). Please replace batteries with 2 x 1.5V IEC LR6 (AA) Alkaline batteries. When the battery icon alone is shown in the display, the batteries are completely exhausted and the Digistat +2RF will cease to function (see fig 2). Re-activate by replacing the batteries.
How to replace the batteries see fig 3.
Remove the battery cover using a coin. Replace the spent batteries with 2 x 1.5V IEC LR6 (AA) Alkaline batteries ensuring correct orientation. Replace the battery cover by pressing fully home.
The Digistat +2RF thermostat is a programmable thermostat 24-Hour (the same program for every day of the week) and allows you to set 6 time and temperature events per day.
Digistat +2RF
Pre-set Program
Your Digistat +2RF comes with the following default settings pre-programmed for your convenience:
Pre-set Program 1. (9 til 5)
Event | 1 | 2 | 3 | 4 | 5 | 6 |
Time | 6:30 | 8:30 | 12:00 | 14:00 | 16:30 | 22:30 |
Temperature | 20.0 | 16.0 | 16.0 | 16.0 | 21.0 | 7.0 |
*The above settings can be understood using the chart below
As you can see, at 06:30 , the heating will come on to raise the temperature to 20ºC. At 08:30, the temperature set point is dropped from 20ºC down to16ºC, it stays at 16ºC throughout the day, until 16:30 when the temperature increases to 21ºC. The temperature then drops down to a night-setback temperature of 7ºC until 06:30 when the cycle repeats for the next day.
Congratulations!
The unit is now set correctly to follow your required timings
To change temperature for a short period (Override):
To set a constant room temperature (Manual mode):
To set holiday mode:
To switch OFF the thermostat:
Press the + and – simultaneously for 5 seconds until the OFF is displayed.
The thermostat and heating system will now be OFF unless the temperature in the controlled space falls below 7°C, the frost protection set point. Please note this does not affect the operation of the domestic hot water where provided.
To switch ON the thermostat, press any key to return to auto mode.
If you wish to change any User Options (shown in table 1) they can be accessed from Auto or Man by pressing < and > simultaneously for 3 seconds. Once you have accessed the User Options Menu (Fig 4) press > to scroll through selectable options. The settings for each option can be changed by pressing + or – as required. Press > to accept the change and move to the next option. To exit press < and > simultaeously for 3 seconds. Alternatively, not pressing any buttons for 2 mins will cause the Digistat +2RF to return to Auto. (Fig 5) shows option 01 24 (24 hour clock). Only selected options that have been accepted by pressing > will be changed.
Preset programs 2 and 3 are shown below:
Pre-set Program 2. (Home for Lunch)
Event | 1 | 2 | 3 | 4 | 5 | 6 |
Time | 6:30 | 8:30 | 12:00 | 14:00 | 16:30 | 22:30 |
Temperature | 21.0 | 16.0 | 21.0 | 16.0 | 21.0 | 10.0 |
As you can see, at 06:30, the heating will come on to raise the temperature to 21°C. At 08:30, the temperature set point is dropped to 16°C, it stays at 16°C until 12:00 when the heating comes on to raise the temperature to 21°C. The temperature stays at 21°C until 14:00 when it drops to 16°C. At 16:30 the heating comes on to raise the temperature to 21°C where it stays until 22:30 when the temperature drops down to a setback temperature of 10°C until 06:30 when the cycle repeats the next day.
Pre-set Program 3. (Home Worker)
As you can see, at 06:00, the heating will come on to raise the temperature to 21°C. At 08:30, the temperature set point is dropped to 19°C, it stays at 19°C until 12:00 when the heating comes on to raise the temperature to 21°C. The temperature stays at 21°C until 14:00 when it drops to 19°C. At 17:30 the heating comes on to raise the temperature to 21°C where it stays until 22:30 when the temperature drops down to a setback temperature of 16°C until 06:00 when the cycle repeats the next day.
Date and time setting.
Digistat +2RF comes with a pre-set clock, which also automatically adjusts for summer/winter time changes. It is activated automatically on 1st installation. There should be no need to change these settings, however, should you wish to, it can be done in Option 05.
(Option 05)
How to adjust the date and time.
Special Note:
The following only applies when the Intelligent delayed start feature is enabled by the installer.
When the delay period is operating indicated by the flame symbol flashing (Fig12), pressing any button returns the Digistat +2RF to auto mode allowing normal button operation until the next time/ temperature event, when it will resume the delay start mode or follows the Holiday, Manual, Override or Off modes as selected. Changes to the installer options and pre-set programs must be made with the flame symbol not flashing.
What is an Intelligent delayed start?
Intelligent Delayed Start (Energy saving feature)
The Intelligent Delayed Start is an energy-saving feature that automatically reduces the warm up time for the heating system. As the weather becomes milder, Intelligent Start will delay the heating start times so that the fuel is not wasted bringing the room up to temperature earlier than necessary.
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