Drayton MiStat P710R, T720R, T720M, T740R, T740M - RF Packs Programmable Thermostats Installation Manual

What is a programmable room thermostat?

... 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 fi nd 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 18°C, 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.

Step 1: Keys and Display / Zone Summary

RF Pack: MiStat P710R

1. Date
2. Call for heat indication. This flame will be visible when the room temperature is below the set temperature
3. : Short flashes = RF transmission
   Continuous flashing = RF signal issue
   : Indicates a Service warning.
   : Indicates that holiday is enabled
   : Low battery warning; see Step 8.
4. Time
5. Current set temperature & duration, e.g. heating is programmed to be 21.0°C until 12:00 am
6. + & - keys: Press to change the current temperature until the next programme event
7. Current mode = Auto Options: see table in step 2.
8. Select timer function. See Step 4.
   Help text: To prompt for next action. It relates to the highlighted line.
9. Arrow keys: Press to move the highlight on screen, and to change field values
10. Select key: Press to select highlighted options, and to open and save editor screens
    
    This icon used throughout these instructions refers to this button
11. Current room temperature
12. Back key: Press to return to the previous screen
13. Home key: Press to go back to the home screen at any time and to toggle between zone summary & home screens

Step 2: Home Screen

Current Mode: Auto
Options: See table below.

Timer: Off. See step 4.

Arrow denotes that further options are available if you scroll down. These are: Programme timetable, Settings

Set: describes the current programme event, e.g. Required temperature is 22.0°C until 12:00am.
Link to Programme timetable - see Step 5.

Now: Current room temperature
Link to Zone summary - see Step 1.

Step 3: Powersave

This screen will show 2 Minutes after the last key press, if "no display" is selected (see Installer Settings), the screen will be blank.

Step 4: Timer

To set a suitable temperature for up to 23 hours, e.g. for short term absence.

When the timer is running, the time will be counted down each hour. Once the timer has elapsed, it will return to the prior temperature screen.

Step 5: Prog. Timetable

Zone = Heating

Timetable day range: Use left and right keys to select available day blocks.
Options: Individual days (7day), Week and weekend (5/2day), All week (24hr).
The available blocks depend on the selection in menu "Change timetable type"

Help text: Use left/right buttons to select the days you want to change

Arrow denotes that further options are available if you scroll down (see step 7).

Period 1 settings: describes the current timetable settings, e.g. Heating is programmed to control at 21.0°C from 7:00am until 10:00am
Period 3 settings: describes the current timetable settings, e.g. Heating is programmed to control at 21.0°C from 4:00pm until the following day (>>> is indicating an event on next day)
Press select () when highlighted to adjust settings (see step 6)
Up to 8 periods can be programmed

Step 6: Period Settings

Highlight shows adjustable field: Use up/down buttons to adjust values

Help text: Use left/right buttons to change fields

Period settings: 21.0°C from 8:00am until 10:00am. >>> Indicates link to next event

Stored programmes

MiStat P contains 3 pre-set programmes, as shown below. These programs can be modified according to personal needs and can be stored by using a name. Via this name they can also be re-loaded.

Once a programme has been modified, the original factory pre-set will no longer be available. On a System Reset, only the current loaded programme will be replaced with the factory setting – see Installation Guide Step 5.

Step 7: Additional User Settings

Step 8: Changing the Batteries

How do I know when to change the batteries?

When the batteries start to run low a battery icon will fl ash in the display to indicate "low battery", during this time the MiStat will function normally. When the battery icon alone is shown in the display, the batteries are completely exhausted and the MiStat will cease to function (see below). Re-activate by replacing the batteries.

How to replace the batteries

Remove the battery covers as shown. Replace the batteries with 2 x 1.5V IEC LR6 (AA) Alkaline batteries ensuring correct orientation. Replace the battery covers pressing fully home.

Step 9: Receiver - Key & LED

Troubleshooting

1. It is not warm early enough
   1. Are time and temperature periods set correctly?
   2. Is Optimum start switched on? (see Installation Guide Step 5 Installer settings/System settings)
   3. Did the thermostat have enough time (a few days) to determine the room data?
   4. Was the radio link established properly and is it still active? (see Installation Guide Step 5 Installer settings/Signal Strength)
2. Heating is starting earlier than set in the programme
   1. Is the Optimum start switched on? (see Installation Guide Step 5 Installer settings/System settings)
3. Setting temperature values are restricted
   1. Are Minimum/Maximum temperatures activated? (see Installation Guide Step 5 Installer settings/Zone settings)
4. No Signal is visible on the screen, no reaction on key presses anymore
   1. Is the receiver powered? (Red signal lamp should be visible)
5. Service due or overdue is visible on the screen, no reaction on key presses
   1. Check the service feature, see Installation Guide Step 5
6. Initialising... Press to force re-bind is visible on the screen, no reaction on key presses anymore
   1. Is the receiver powered? (Red signal lamp should be visible)
7. Please wait... Press to force re-bind is visible on the screen, no reaction on key presses anymore
   1. Is the receiver powered? (Red signal lamp should be visible)

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