Drayton 22084 Programmable Room Thermostat
Installation Guide
Warning
If you do not have the knowledge to install the Digistat+2 safely, arrange for a competent electrician to install it for you. Wiring should conform to the current IEE wiring regulations. Isolate mains supply before removing an existing room thermostat and fitting Digistat+2. Digistat+2 programmable room thermostats are double insulated therefore Neutral and Earth connections are not required. Unused existing cables should be safely insulated.
LOCATION
Care should be taken to mount the Digistat+2 on a wall, in a postion which is not subject to direct sunlight or draughts. Preferably it should be mounted on an inside wall about 1.5M (5ft) above the floor in a position where it can respond to room temperature but away from the direct influence of radiators or other appliances giving off heat
Installation
- Remove the front cover using a flat screwdriver and separate from back plate
- Fix the back plate directly onto the wall using suitable wall plugs and screws or mount over existing wall box
- Complete the wiring according to the connection suggestions
- For Basic boiler, Combi boiler and Basic boiler with zone valve applications Digistat+2 with battery or mains supply are suitable.
- For Electric Heat application use Digistat+2 with mains supply only.
- Replace the front cover by locating in position and pushing fully onto the back cover
- Remove the battery cover using a coin Battery model only.
- Install the 2 AA batteries provided Battery model only.
- Replace battery cover Battery model only.
- The Digistat+2 is now installed and will automatically start to control the room temperature according to the pre-set program 1 as shown in the User Guide.
- The display shows the correct time and date which is automatically set together with the actual room temperature.
Installer Options.
If you wish to change any of the Installer Options as shown below, enter the Installer Option Menu from Auto mode by pressing < and + simultaneously for 5 seconds. Pressing < and + again for 5 seconds will exit the Menu and return to Auto mode. Once the Installer Options screen has been selected (Fig 8), the < and > buttons allow you to scroll through the Menu (shown below). The + and – allow you to change values. Once a value has been changed pressing > before exiting the Menu will save the new setting. (Fig 9 shows Option 1 OFF).
Access protection lock.
The access protection lock allows the installer to lock the Digistat+2 so that the user cannot make any adjustments. The default is OFF mode allowing the users to adjust the Digistat+2 (see User Guide). To Lock the Digistat+2 settings enter the Installer Options Menu (Refer to Installer Option 1) and select On and press > to accept. Once the Installer Options Menu is exited all buttons will be locked. To switch off the Protection Lock enter the Installer Menu and change to OFF. Press > to accept. Once the Installer Menu is exited all buttons will be free to adjust.
Freeze protection.
Freeze protection will switch on the heating if the room temperature falls to 5ºC and will then control the temperature at 7ºC even if the Digistat+2 is in OFF mode. The freeze protection default is ON. To switch off the Freeze protection mode enter the Installer Options Menu (Refer to Installer Options 2) and change to OFF.\ Press > to accept.
Low and High Limit set points.
The user temperature set points defaults are High 32ºC and Low 7ºC, to change these limits enter the Installer Options Menu (Refer to Installer Options 3 & 4).
Intelligent Delayed Start (Energy saving feature).
The Intelligent Delayed Start is an energy saving feature which 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 fuel is not wasted bringing the room up to temperature earlier than necessary. Note: Intelligent Delayed Start only applies in Auto mode. Intelligent Delayed Start default is in OFF mode. To switch on Intelligent Delayed Start enter the Installer Options Menu (Refer to Installer Options 5). Note the Intelligent Delayed start option is not suitable for Hydronic underfloor application. Ensure Installer option 5 is set to Off before final commissioning for Hydronic underfloor application.
Valve protection.
In some hydronic heating systems there may be a requirement to protect the valve by operating it once a day, for a given period without bringing on the heating system. If valve protection is selected the valve will be operated for a period as shown in Valve protection time (mins). Valve protection time every day at 10.00am. Valve protection default is OFF. To enable the valve protection mode enter the Installer Options Menu (Refer to Installer Option 6)
Valve protection time (mins).
Valve protection time can be set between 1 and 5 minutes (default 3 minutes) To change this once a day on time enter the Installer Options Menu (Refer to Installer Option 7).
Sensor fault function.
When the display shows an error code (E1) or (E2) this indicates a sensor fault and the heating system will remain Off. (E1) = internal sensor and (E2) = external sensor. If (E1) is shown the Digistat+2 should be replaced. If (E2) is shown, first check the external sensor terminal block connections before replacing the Digistat+2. Sensor fault function allows you to temporally set the Digistat+2 to cycle the heating system 30% On and 70% Off until you have replaced the product. This can be done by entering the installer Option Menu (Option 8) and selecting On. Press > to accept. To reset to default Off, entering the installer Option Menu (Option 8) and selecting Off. Press > to accept.
Application Type.
Digistat+2 can be used for different applications. In the installer menu, select:
- 00 = Gas Boiler
- 0 1= Oil Boiler
- 02 = Electric Heat
- 03 = Hydronic Underfloor
System Capability
Adjust this setting to suit the heating system capability. In the installer menu, select:
- 00 = Fast – the house usually reaches setpoint in < 1 hour
- 0 1= Slow – the house usually reaches setpoint in > 1 hour
Drayton – Digistat+2 24 Hour Programmable Room Thermostat
Programs are the same every day (Monday to Sunday).
TECHNICAL DATA
User Guide
Your Digistat+2 programmable room thermostat. 24-Hour
Digistat+2 programmable room thermostat allows you to set time and temperature periods (up to 6 per day) to suit your own lifestyle. Once fully installed and powered the Digistat+2 will automatically set the correct time and in auto mode will control your heating system according to pre-set program 1 (9 till 5). The temperature is controlled by sensing 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.
How to change the temperature for a short time (Override)?
When in Auto mode you can override the existing temperature setting by pressing + or -. During adjustment the temperature will flash then stop. The Digistat+2 will now control at this temperature until the next programmed time/temperature event is reached, when the Digistat+2 will revert back to Auto mode. Whilst in temperature override the pointer indicates both Man and Auto. To exit override press > to return to Auto. (Fig 1) shows Digistat+2 in override.
How to set a constant room temperature (Manual mode)?
Manual mode will allow you to set a temperature, over-riding all programs, until you exit manual mode. In this mode all pre-set time temperature events will be disabled. To enter manual mode press < until the pointer indicates MAN (Fig 2). The screen will only show the temperature, which can be adjusted by pressing + or -. Once you have set the temperature it will flash for 5 seconds and then stop. The Digistat+2 will now control at this temperature until you adjust using + or – or exit by pressing > to enter Auto mode.
How to set my room temperature for my holiday period. (Holiday Mode)?
When going on holiday you can lower the temperature of your home for the duration of your holiday, but set Digistat+2 to return to your normal programming ready for your return. Holiday mode works by counting down the days or hour until your return. Time periods of between 1 to 24hr then 1 day to 199 days can be set.
Example
I am ready to leave for my 2 week (14 day) holiday and would like the house temperature held at a constant 10.0 ºC during this time and on my return the house temperature will be already running at my normal pre-set temperature. To enter Holiday mode press the < button until the pointer is indicating HOL (fig 3). The temperature will flash and by pressing the + or – buttons you can change to the temperature required (in this example to 10.0 ºC) (Fig 3a). Then press < again to set the time period.(in this example 14 days) using the + or – buttons. (it would be advisable in this example to set the time period 1 day less (13 days) to ensure the house temperature is back to normal on your return). (Fig 3b) Once you have set your time period the time will flash for 10 seconds and then start the holiday period. To exit the Holiday mode press either < or > to return to auto mode. When changing time the display will scroll through Hr (Hours) 1-24 then d (Days) 1-99. The display will show holiday time period and set temperature
Battery Model only
How do I know when to change the batteries.?
When the batteries start to run low a battery icon will blink for 15 seconds every 15 seconds to indicate “low battery” during this time the Digistat+2 will function normally (see fig 4). Please replace batteries with (2 x AA 1.5V Alkaline batteries). After 6 months the Digistat+2 will cease to function and will permanently display the battery icon and nothing else, shown in (fig 5).
How to replace the batteries see fig 6.?
Remove the battery cover using a coin. Replace the spent batteries with 2 x AA 1.5V alkaline batteries ensuring correct orientation. Replace the battery cover pressing fully home.
How to change the time, day, month & year.?
Digistat+2 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 clock mode. To enter the clock mode press > to move through Day and all 6 time/temperature events until the arrow points to the clock symbol. The time will now flash and can be adjusted (Fig 7) by pressing + or – then press > to accept and move to Day.
- Change day. (Fig 8).
- If you wish to change the day press + or – then press > to accept. Digistat+2 will move to the next field – month.
- Change month. (Fig 9).
- If you wish to change the month press + or – then press > to accept. Digistat+2 will move to the next field – Year.
- Change year. (Fig 10).
- If you wish to change the year press + or -, then press > to accept. Digistat+2 will now return to Auto mode
Display Error code E1 or E2.
When the display shows E1 or E2 this indicates a sensor fault and your heating system will remain Off. Please contact your installer.
How to select another pre-set time/temperature program.?
There are 3 pre-set time/temperature programs already held in memory as shown, if pre-set program 1 is the best program to suit your lifestyle do nothing and the Digistat+2 will control to program 1. If you would like to select one of the other pre-set programs, refer to ‘How to change User Options’, Option 3 and select your preferred program.
Pre-set programs for Digistat+2 24 Hour
Program 1 (9 till 5) as shown below
Program 2 (Home for lunch)
Program 3 (Home worker)
How to change the pre-set time/temperature program to my own selection
- Press > to select the day function. (refer to fig 11).
- This indicates that any changes made are valid for all days of the week
- Press > to view the existing time/temperature event (1). (Fig 12) time will flash. Press > again to view the temperature setting, temperature will flash. Press > again to view the 2nd time/temperature event (Fig 12a).
How to change User Options.
If you wish to change any user options 1 to 8 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 setting Menu (Fig 13) press > to scroll through selectable options 1 to 8. 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+2 to return to Auto. (Fig 13a) shows option 1 24 (24 hour clock). Only selected options which have been accepted by pressing > will be changed.
How to change from 24hr to 12hr clock (Option 1)?
Enter user options, select option 1 and use + and – keys to select desired option, 12 = 12hr and 24 = 24hr. Press > to accept change.
How to change the default manual set-point temperature (Option 2).?
Enter user options, select option 2 and use + and – keys to set desired temperature. Press > to accept desired change.
How to change to another predefined program 1, 2 or 3 (Option 3)?
Enter user options, select option 3 and use + and – keys to select desired program 1, 2 or 3. 1 = program 1, 2 = program 2 and 3 = program 3. Press > to accept desired change.
How to change the number of program events per day (Option 4)?
Enter user options, select option 4 and use + and – keys to select desired option. 2 = 2 time / temp events per day, 4 = 4 time / temp events per day and 6 = 6 time / temp events per day. Press > to accept desired change.
How to switch on/off the automatic summer / winter time change (Option 5)?
Twice a year the actual time is automatically changed to keep it in line with the summer/winter time change. Default setting is On. If you wish to disable / enable this feature enter user options, select option 5 and press – or + key to display Off or On as desired. Press > to accept desired change.
How to change temperature offset (Option 6).
The temperature displayed on the thermostat may not match that of other temperature measuring devices in the controlled space, because of its location. The displayed and set temperature may be offset to bring it in line with other devices. To adjust the temperature, enter the user options, select option 6. The temperature may be offset by +/- 5 degrees by pressing the + and – keys. Press > to accept the desired change.
How to restore the built in time temperature programs (Option 7).
Enter user options, select option 7 and use + and – keys to select desired option. Off = current programs retained. On = restore factory program settings. Press > to select the desired change. Please note enabling this function will lose any user changes to the preset programs.
How to switch the Digistat+2 and heating system off (Option 8).
To switch the Digistat+2 and the heating system off you need to enable the Off function. Enter user options, select option 8 and use + or – keys to select On to enable the Off function .The thermostat and heating system will now be Off unless the temperature in the controlled space falls below 7oC the frost protection set-point. The LCD will display Off and room temperature only and the keys will not function. To switch On the Digistat+2 enter user options select option 8 and use + or – keys to select Off to disable the Off function. The thermostat will now regulate the heating system in line with the currently selected program. Please note this does not effect the operation of domestic hot water where provided.
What is a programmable room thermostat?
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 18C, 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.
REFERENCE
DOWNLOAD MANUAL
Drayton 22084 Programmable Room Thermostat Installation Guide
Drayton 22084 Programmable Room Thermostat Installation Guide
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