Heatmiser SLIMLINE User manual

1Model: PRT-E Model: Slimline

Model: Slimline
1 Slimline Series

Table of Contents
1
2
3-4
5-6
7-8
9
10
11-12
13
14
15
16
17
18
19-22
23
24
25-27
Product Image
Table of Contents
What is a Programmable Room Thermostat?
Installation Procedure
LCD Display
Setting the Clock
Temperature Display
Setting the Comfort Levels
Locking the Thermostat
Setting the Temperature
Temperature Hold
Holiday Programming
Frost Protection
Power On / Off
Optional Features
Re-calibrating the Thermostat
Factory Reset
Wiring Diagrams
Table of Contents
1
2
3-4
5-6
7-8
9
10
11-12
13
14
15
16
17
18
19-22
23
24
25-27
1
13
7-8
17
3-4
15
10
19-22
Product Image
Table of Contents
What is a Programmable Room Thermostat?
Installation Procedure
LCD Display
Setting the Clock
Temperature Display
Setting the Comfort Levels
Locking the Thermostat
Setting the Temperature
Temperature Hold
Holiday Programming
Frost Protection
Power On / Off
Optional Features
Re-calibrating the Thermostat
Factory Reset
Wiring Diagrams
Product Image
Locking the Thermostat
LCD Display
Frost Protection
What is a Programmable Room Thermostat?
Temperature Hold
Temperature Display
Optional Features
24Factory Reset
2Model: Slimline

3 Slimline Series3 Slimline Series
What is a Programmable Room Thermostat?
A programmable room thermostat is both a programmer and a room thermostat.
The programmer allows you to set “On” and “Off” periods to suit your own lifestyle.
The 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 and preferences.
Setting a programmable room thermostat to a higher temperature will not make the
room heat up any faster. How quickly the room heats up depends on the design & size of
the heating system.
Similarly reducing the temperature setting does not affect how quickly the room cools
down. Setting a programmable room thermostat to a lower temperature 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.

4Model: Slimline
The best way to do this is to set the room thermostat to a low temperature
– say 18°C , and then turn it up by 1°C each day until you are comfortable with the
temperature. You won’t have to adjust the thermostat further. Any adjustment above
this setting 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.
You are able to temporarily adjust the heating program by overriding or using the
temperature hold feature. These features are explained further on pages 14 and 15 of
this manual.
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 also prevent the thermostat from working
properly.

5 Slimline Series
Installation Procedure
This Slimline Series thermostat is designed to be flush mounted and requires a back
box of 35mm (minimum depth) to be sunk into the wall prior to installation.
Step 1
Carefully separate the front half of the thermostat from the back plate by placing a
small flat head terminal driver into the slots on the bottom face of the thermostat.
Step 2
Place the thermostat front somewhere safe.
Terminate the thermostat as shown in the diagrams on pages 25-27 of this booklet.
Step 3
Screw the thermostat back plate securely into the back box.
Step 4
Clip the front of the thermostat back onto the thermostat back plate.
Do
Mount the thermostat at eye level.
Read the instructions fully so you get the best from our product.
Don’t
Do not install near to a direct heat source as this will affect functionality. Do
not push hard on the LCD screen as this may cause irreparable damage.

6Model: Slimline
1 2
3 4

1 2 3 4 5
6 7 8 9 10 11
12
7 Slimline Series

8Model: Slimline
1. Room Temp - Indicates the current temperature sensor mode.
2. Day Indicator - Displays the current day.
3. Frost Icon - Displayed when the thermostat is in frost protection mode.
4. Flame Icon - Displayed when the thermostat is calling for heat, the flame icon
will flash when the optimum start function is in operation.
5. Temperature Hold - When a Temp Hold is active, HOLD FOR and the remaining
time period is displayed.
6. Set - Indicates when changes are being made to programs or temperature set
points.
7. Holiday Indicator - Displayed when the thermostat is in holiday mode.
8. Current Temp - Indicates the current sensor temperature.
9. Program Cycle Indicator - Displayed during programming only to show which
period is being altered.
10. Keypad Lock Indicator - Displayed when the keypad is locked.
11. Units of Temperature - Degrees Celsius or Fahrenheit.
12. Clock - Digital clock display in 24h format.
LCD Display

9 Slimline Series
Setting the Clock
To set the clock, follow these steps.
• With the thermostat turned ON, press the Clock key twice ................................
• Use the Up/Down keys to set the hours .............................................................
• Press H to confirm settings ...............................................................................................
• Use the Up/Down keys to set the minutes ........................................................
• Press H to confirm settings ..............................................................................................
• Use the Up/Down keys to set the day of the week .........................................
• Press A to confirm settings and return to main display .........................................
Day
Hours
Minutes

10Model: Slimline
Room Temperature Set Temperature
This is the current room temperature. This is the temperature you are trying to
achieve in your home.
Temperature Display
The temperature display information is driven by two different inputs; the sensor
measurement and the target temperature you have set.

Comfort Levels Explained
The thermostat offers the following program mode options;
Non-Programmable – Basic up/down override temperature control.
5/2 Day Programming – 4 levels for the weekdays and 4 different levels for the weekend.
7 Day Programming – 4 levels for each day.
Consult the ‘Optional Features’ section to select the required mode.
• To program comfort levels, press Clock once ..............................................................
For 7 Day programming,
only Mon is displayed
in the day indicator field.
For Weekday/Weekend programming,
Mon Tue Wed Thu Fri
are displayed on screen.
11 Slimline Series

12Model: Slimline
• Use the Up/Down keys to enter the required WAKE time ......................
• Press H to confirm settings .........................................................................................
• Use the Up/Down keys to enter the required WAKE temperature .......
• Press H to confirm settings .........................................................................................
• You will now see “LEAVE” displayed on screen.
• Repeat the programming steps for each period until complete.
• For unused periods enter --.-- and the thermostat will ignore the setting.
• Press A to confirm settings and return to main display ....................................
Note:
• In 7 Day programming mode you can repeat for each day independently.
• In Weekday/Weekend programming mode you will see Sat Sun displayed on
screen and can repeat for the weekend.
• To change the programming mode please refer to pages 21-22.

Locking the Thermostat
The thermostat has a keypad lock facility. To activate the lock follow these steps.
• Press and hold the A and Down keys together for 10 seconds .........
• You will see the lock symbol appear on screen .............................................
• To unlock, repeat the steps above until the lock symbol disappears.
Note: The keypad lock indicator is only displayed when the lock is active.
Keypad Lock Indicator
13 Slimline Series

14Model: Slimline
Temperature Control
The Up/Down keys allow you to adjust the set temperature .......................
When you press either key, you will see the word SET and the desired
temperature will be displayed on screen.
Use the Up/Down keys to adjust the SET value .................................................
Press A to confirm settings and return to main display .............................................
Set Temperature
Set Icon
Note: In programmable mode, this new temperature is maintained only until the next
programmed comfort level.
In non-programmable mode, this temperature will be constantly maintained.

Temperature Hold
The temperature hold function allows you to manually override the current operating
program and set a different temperature for a desired period.
• Press H to commence temperature hold ..................................................................
• Use the Up/Down keys to enter the required Hold time.............................
• Press H to confirm settings .............................................................................................
• Use the Up/Down keys to enter the required Hold temperature.............
• Press A to confirm settings and return to main display .......................................
You will see the Hold For indication is displayed on screen.
The time will countdown the set duration and then revert to the normal program.
To cancel temperature hold, follow the same steps but reduce the Hold time to 00:00 hours.
Hold ON Indicator
Hold Time Remaining
15 Slimline Series

16Model: Slimline
Holiday Days Holiday
ON Indicator
Note: A holiday period does not start until 00:00 the next day. For example, if you set
a holiday period on Friday for 2 days, Saturday will be counted as the first day and the
thermostat will revert back to the programmed schedule at 00:00 on Monday.
The holiday function reduces the set temperature in your home to the frost protection
temperature setting (see page 19).
The thermostat will maintain this temperature for the duration of the holiday and will
then automatically return to the program mode on your return.
• Press H three times (until you see the suitcase on screen) ................................
• Use the Up/Down keys to enter the number of days holiday ..................
• Press A to confirm settings and return to main display ......................................
The display will show a suitcase indicating the thermostat is in holiday mode.
Holiday
To cancel, follow the same steps but reduce the Holiday duration to 00 days.

17 Slimline Series
Pressing the Power button once will place the thermostat in frost protect mode. In
this mode, the thermostat will display the frost icon and will only turn the heating
on should the room temperature drop below the set frost temperature (see page 19).
Should the heating be turned on whilst in frost mode, the flame icon will be displayed.
To cancel the frost protect mode, press the Power button once again.
Frost Protection Mode Enabled
Frost Mode

18Model: Slimline
Thermostat completely OFF Thermostat powered ON
Heating On/Off
The heating is indicated ON when the flame icon is displayed.
When the flame icon is absent, there is no requirement for heating to achieve the
set temperature but the thermostat remains active.
To turn the thermostat OFF completely, press and hold the Power button..........
The display and heating output will be turned OFF completely.*
To turn the thermostat back ON, press the Power button once again ...................
*See Feature 3 on page 19

19 Slimline Series
Optional Features Explained
THE FOLLOWING SETTINGS ARE OPTIONAL AND IN MOST CASES
NEED NOT BE ADJUSTED
Feature 01 – Temperature Format: This function allows you to select between °C and °F.
Feature 02 – Switching Differential: This function allows you to increase the switching
differential of the thermostat. The default is 1°C which means that with a set temperature
of 20°C, the thermostat will switch the heating on at 19°C and off at 20°C.
With a 2°C differential, the heating will switch on at 18°C and off at 20°C.
Feature 03 – Frost Protect: You can set whether the thermostat will maintain the frost
temperature when the thermostat display is turned off. As a default, this is enabled.
Feature 04 – Frost Protect Temperature: This is the temperature maintained when the
thermostat is in frost mode. The range is 07 - 17°C. The default is 12°C and is suitable for
most applications.
Feature 05 – Output Delay: To prevent rapid switching, an output delay can be entered.
This can be set from 00 - 15 minutes. The default is 00 which means there is no delay.
Feature 06 – Communication Address: Not used on this model.
Feature 07 – Temperature Up/Down Limit: This function allows you to limit the use of the
up and down keys. This limit is also applicable when the thermostat is locked and so allows