Heatmiser PRT-EW User manual

1Model: PRT-EW Model: PRT-EW

2Wireless Series 2Model: PRT-EW
Model: PRT-EW
Wireless Series1
Table of ContentsTable of Contents
1
2
3-4
5-6
7-8
9
10
10
11-12
13
14
15-16
17
18
19
Product Image
Table of Contents
What is a Programmable
Room Thermostat?
Installation Procedure
Installing the Batteries
Replacing the Batteries
Conguring the Thermostat
Pairing with the RC2-W Receiver
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
Remote Air Sensor Wiring
Notes
20
21
22
23-26
27
28
29
30

43 Wireless Series Model: PRT-EW
The way to set and use your programmable room thermostat is to nd the lowest
temperature settings that you are comfortable with at the dierent times you have
chosen, and then leave it alone to do its job.
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.
You are able to temporarily adjust the heating program by overriding or using the
temperature hold feature. These features are explained further on pages 18 and 19
of this manual.
Programmable room thermostats need a free ow of air to sense the temperature,
so they must not be covered by curtains or blocked by furniture. Nearby electric
res, televisions, wall or table lamps may also prevent the thermostat from working
properly.
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 “O” 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 o 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
dierent temperatures in your home at dierent 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 and size
of the oor heating system.
Similarly reducing the temperature setting does not aect 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.

65 Wireless Series Model: PRT-EW
Installation Procedure
This wireless thermostat is designed to be surface mounted.
Step 1
Carefully separate the front half of the thermostat from the back plate by placing a
small at head terminal driver into the slots on the bottom face of the thermostat.
Step 2
If you are installing a remote air temperature probe, terminate the thermostat as
shown in the diagram on page 29.
Mark 2 hole positions on the wall using the backplate as a positioning template.
Drill at the marked positions and insert a wall plug into each hole.
Step 3
Screw the thermostat back plate securely on the wall.
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 aect functionality.
Do not push hard on the LCD screen as this may cause irreparable damage.
1
34
2

87 Wireless Series Model: PRT-EW
Installing the Batteries
2x AAA batteries have been supplied with this thermostat.
To access the battery holder, push and release the compartment door located on
the bottom face of the thermostat.
Insert the batteries in the empty battery holder, ensuring that each battery is
orientated for the correct polarity + / - .
Push the battery holder back inside the thermostat until it is secured
in its closed position.

109 Wireless Series Model: PRT-EW
Conguring the Thermostat
With the thermostat turned OFF:
• Press & hold the Clock button until the LCD screen comes on ........................
• You will now see 01 in the top right hand corner. This is feature 01.
• Press the clock again until you see feature 07 (receiver address) ...................
• Use the Up/Down keys to set the address .......................................................
A unique receiver address must be set for each receiver installed.
(RF is disabled if receiver address is set to 00).
• Press A to conrm settings and the display will go blank ...................................
Pairing the RC2-W Receiver
• On the receiver, press and hold the Pairing button until the Comms LED lights up.
• With the thermostat turned OFF, press & hold the A button for 5 seconds ...........
• The thermostat will send a signal for 1 minute and will ash the RF signal icon.
• If pairing is successful, the Comms LED on the receiver will ash.
• Press the Power button on the thermostat once to conrm pairing ..............
If pairing is unsuccessful, check feature 07 has been congured correctly.
To eliminate a possible signal issue, reposition the thermostat closer to the receiver
and repeat the pairing process again.
Batteries have a xed lifespan and will need to be replaced occasionally to
ensure the thermostat operates correctly.
The thermostat will inform you when the batteries need to be replaced by
displaying the battery icon on screen.
Note: You must replace the batteries within 1 minute of removal in order to retain
the current clock and comfort level settings.
Replacing the Batteries
Battery Icon
(Flashes)

1211 Wireless Series Model: PRT-EW
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, ashes when the
Optimum Start function is in operation.
5. RF Icon - Flashes when the thermostat communicates with the receiver.
6. Temperature Hold - Displayed when manually overriding the program,“HOLD
FOR” and the time period are displayed.
7. Set - Displayed when changes are made to programs or temperature set points.
8. Holiday Indicator - Displayed when the programmer is in holiday mode.
9. Current Temp - Indicates the current sensor temperature.
10. Program Cycle Indicator - Displayed during programming only to show which
period is being altered.
11. Battery Level - Indicates when the batteries require replacement.
12. Keypad Lock Indicator - Displayed when the keypad is locked.
13. Units of Temperature - Degrees Celsius or Fahrenheit.
14. Clock - Digital clock display in 24h format.
LCD Display
1 2 346
7 8 9 10 12 13
14
11
5

1413 Wireless Series Model: PRT-EW
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 conrm settings ................................................................................................
• Use the Up/Down keys to set the minutes .........................................................
• Press H to conrm settings ...............................................................................................
• Use the Up/Down keys to set the day of the week ..........................................
• Press A to conrm settings and return to main display ..........................................
Temperature Display
Room Temperature Set Temperature
This is the current room temperature. This is the temperature you are trying to
achieve in your home.
The temperature display information is driven by two dierent inputs; the sensor
measurement and the target temperature you have set.
Day
Hours
Minutes

1615 Wireless Series Model: PRT-EW
Comfort Levels Explained
The thermostat provides Weekday/Weekend or 7 Day Programming options.
You should consult the“Optional Features” section to select the required mode.
The thermostat is supplied with comfort levels already programmed, but these can be
changed easily. The default times and temperatures are;
08.00 - 21°C (Wake) 09.30 - 16°C (Leave) 16.30 - 22°C (Return) 23.00 - 17°C (Sleep)
If you only want to use 2 levels, you should program the unused levels to --.--
Note: For Weekday/Weekend programming, the 4 comfort levels are the same for all
weekdays but can be dierent for the weekends.
For 7 Day programming, each day can have 4 dierent comfort levels.
• To program comfort levels, press Clock once ...................................................................
• Use the Up/Down keys to enter the required WAKE time .......................
• Press H to conrm settings ..........................................................................................
• Use the Up/Down keys to enter the required WAKE temperature .......
• Press H to conrm 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 conrm 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 24-26.
For 7 Day programming,
only Mon is displayed
in the day indicator eld.
For Weekday/Weekend programming,
Mon Tue Wed Thu Fri
are displayed on screen.

1817 Wireless Series Model: PRT-EW
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 conrm settings and return to main display .............................................
Set Temperature
Set Icon
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.
Note: This override will be maintained until the next programmed comfort level.
Keypad Lock Indicator

2019 Wireless Series Model: PRT-EW
Temperature Hold
The temperature hold function allows you to manually override the current operating
program and set a dierent 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 conrm settings ..............................................................................................
• Use the Up/Down keys to enter the required Hold temperature..............
• Press A to conrm 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
Holiday
The holiday function reduces the set temperature in your home to the frost
protection temperature setting (see page 23).
The thermostat will maintain this temperature for the duration of the holiday and will
then automatically return to the program schedule 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 conrm settings and return to main display .......................................
The display will show a suitcase indicating the thermostat is in holiday mode.
To cancel, follow the same steps but reduce the Holiday duration to 00 days.
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 rst day and the
thermostat will revert back to the programmed schedule at 00:00 on Monday.

2221 Wireless Series Model: PRT-EW
Frost Protection Mode Enabled
Thermostat completely OFF Thermostat powered ON
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 23).
Should the heating be turned on whilst in frost mode, the ame icon will be displayed.
To cancel the frost protect mode, press the Power button once again.
Frost Mode Heating On/O
The heating is indicated ON when the ame icon is displayed.
When the ame 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 23

2423 Wireless Series Model: PRT-EW
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 Dierential: This function allows you to increase the switching
dierential 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 o at 20°C. With a 2°C
dierential, the heating will switch on at 18°C and o at 20°C.
Feature 03 - Frost Protect: You can set whether the thermostat will maintain the frost
temperature when the thermostat display is turned o. 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 – Not used on this model.
Feature 07 – Receiver Address: Within one building, up to 32 RC2-W’s can be used.
Each receiver must have a unique receiver address (01-32).
Feature 08 – Not used on this model.
Feature 09 – Not used on this model.
Feature 10 – Fail Safe: If enabled, the thermostat will send a signal to the receiver every
20 minutes. Should the receiver fail to receive two signals, the receiver will activate the
output for 20% of the time. This is to protect the system against a loss of wireless signal
and in case the thermostat battery fails whilst you are away.
Feature 11 – Up/Down Temperature 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 you to give others limited control of the heating system.
Feature 12 – Air Sensor Selection: On this thermostat, you can select which sensor
should be used - built in sensor or remote air sensor. A oor sensor MUST be
connected to the receiver before it will operate.
Feature 13 – Floor Limit: This thermostat uses the oor limiting sensor connected
to the receiver to protect the oor surface from overheating. The oor limit is set
from the thermostat but stored in the receiver.
Should the RF link fail, the receiver will limit the oor from overheating.
The limit can be adjusted from 20-45oC (28oC is Default).
Feature 14 – Optimum Start: Optimum start will delay the start up of the heating
system to the latest possible moment to avoid unnecessary heating, so that the
dwelling is comfortably warm by the programmed time. The thermostat uses the
rate of change (see below) setting to calculate how long the building needs to raise
the temperature 1°C (with a rate of change of 20, the thermostat has calculated the
building needs 20 minutes to raise the building 1°C). On this thermostat, optimum
start works on the Wake and Return comfort levels.
Feature 15 - Rate of Change: Minutes to raise by 1°C.
Feature 16 - Weekday/Weekend or 7 Day Programming: The thermostat oers
two programming methods. Weekday/ Weekend allows you to program 4
comfort levels for the weekday and 4 dierent comfort levels for the weekend.
In 7 day program mode, each day has 4 comfort levels that can be programmed
independently.

2625 Wireless Series Model: PRT-EW
Optional Settings - Feature Table
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
FEATURE
Temperature Format
Switching Dierential
Frost Mode
Frost Protection Temperature
Output Delay
Not in use on this model
RC2-W Address
Not in use on this model
Not in use on this model
Fail Safe
Up/Down Limit
Sensor Selection
Floor Limit
Optimum Start
Rate of Change
Program Mode
DESCRIPTION
00 = oC, 01 = oF (°C = Default)
01o- 03oC (01oC = Default)
00 = Enabled, 01 = Disabled (00 = Default)
07o- 17oC (12oC = Default)
00 - 15 Minutes (00 = Default)
01-32
00 = Disabled, 01 = Enabled (01 = Default)
00o-10oC (00oC = Default)
00 = Built in Air Sensor, 01 = Remote Air Sensor
20-45oC (28oC = Default)
00-03 Hours (00 = Default)
Minutes to raise by 1oC
00 = Weekday/Weekend
01 = 7 Day Programming
SETTING
Adjusting the Optional Settings
To adjust the optional settings, follow these steps.
• Press and hold the Power button to turn the thermostat OFF ..............................
• Press and hold the Clock key until the display appears as shown below ..........
• Use the Clock key to cycle through the features ......................................................
• Use the Up/Down keys to change the setting ....................................................
• Press A to conrm settings .................................................................................................
• Press the Power button once again to turn the thermostat back ON .................
Setting Value
Feature Number

2827 Wireless Series Model: PRT-EW
All icons displayed simultaneously. Factory reset is complete.
Factory Reset
The thermostat has a reset function to restore all settings to their factory defaults.
To perform a factory reset, follow these steps.
• Press and hold the Power button to turn the thermostat OFF ..........................
• Press and hold the Power and Up keys together until the LCD powers up.
All of the icons will be displayed on screen .........................................................
• When the icons have disappeared from the screen, the thermostat has
been successfully reset.
• Press the Power button once to turn the thermostat back ON .........................
Re-calibrating the Thermostat
If you need to re-calibrate the thermostat, follow these steps.
• Press and hold the Power button to turn the thermostat OFF ............................
• Press and hold BOTH the Power and Down keys together until the
temperature appears on the screen ........................................................................
• Use the Up/Down keys to congure the new temperature ...........................
• Press A to conrm settings ...............................................................................................
• Press the Power button once to turn the thermostat back ON ..........................
Calibration Temperature Setting
Set Icon

3029 Wireless Series Model: PRT-EW
Notes
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
.........................................................................................................................................................................
Wiring Diagram - Remote Air Sensor
REMOTE AIR PROBE
Set feature 12 to 01 to
enable the remote air probe
White
Wire
Red
Wire

31 Wireless Series
Video
Twitter: heatmiseruk
Facebook:
facebook.com/thermostats
Want More Information?
Call our support team on: [phone]
Or view technical specications directly on our website:
www.heatmiser.com
PDF FAQ
Heating Professionals:
Request a copy of our product
installation guide containing
detailed technical specications
for our complete product range:
www.heatmiser.com/guide