Question 1

I've just changed the battery in mine and it is displayin "un boil".  It seems to be working though.  Does anyone have any idea what "un boil" means?

Accepted Answer

I had the same issue and emailed esi tech support who responded really quickly - they said it means the thermostat is regulating the boiler temperature so it works more efficiently and shouldn't affect functioning. Full reply below.

"The UNBOIL message which appears in place of the date on your thermostat is an OpenTherm notification that is telling you that your boiler will not need to heat the return water any further at the moment as it is already satisfied.
Typically, thermostats use electrical voltage to talk to boilers to say either ON or OFF, however OpenTherm works by using a language (called OpenTherm) that works as a load compensator which will regulate your heating by modulating the boiler at specific points to keep your heating at your target temperature far more accurately and will run your boiler more efficiently.
The UNBOIL message will not interfere with any functions on your room thermostat and it is normal to see this. If your thermostat was not wired in using the OpenTherm terminals, then it is in effect talking to itself, but it will still not have any negative influence on the operation of your thermostat."

Question 2

How do you programme this from 4 “events” to 6? It only seems to give 4, despite saying it offers 6.

Accepted Answer

How to Change From 4 Programs To 6 Programs

This is NOT mentioned in the user guide, So I emailed ESI to get the following instructions and I can confirm they work.

1.       Move the slider bar to the OFF position.
          You should see a snowflake on the display.

2.       Press & Hold the A button, H button and >> button together.
          You will see either ON or OFF flashing on the display.
          Release the buttons.

3.       Press & Release the >> button until you see CODE on the display.

4.       Press the >> button once more and you will see an error code appear and then disappear.

5.       The error code will be replaced by number 4.

6.       Use the + button to change the 4 to 6.

7.       Press the HOME button to exit the menu.

You will now have 6 programmable events instead of 4.

To change back to 4 you do exactly the same thing but select 4 in step 6.

Question 3

My boiler is in manual mode. With teampature turned down to 5 degrees. But the thermostats comes back in to 20 21 degrees. By itself why?

Accepted Answer

After you set the temperature, the screen will change to the current room temperature.

Question 4

Will it work with a ideal logic combi 30

Accepted Answer

Works a treat, I took out my ideal built in RF unit and fitted an ESI, far quicker response and more accurate

ASIN	B01N9X2F32
Backlight	Yes
Best Sellers Rank	56,259 in DIY & Tools ( See Top 100 in DIY & Tools ) 32 in Home Programmable Thermostats
Brand Name	WeaShaemgLi
Colour	White
Connectivity Protocol	Wi-Fi
Connectivity Technology	Bluetooth
Control Method	App
Control Type	Button Control
Controller Type	manual
Customer Reviews	4.6 4.6 out of 5 stars (800)
Display Type	lcd
Global Trade Identification Number	00753677550889
Included Components	1 x Sender, 1 x Thermostat
Item Dimensions D x W x H	6.4D x 23.4W x 14.8H centimetres
Item Type Name	Wireless Programmable Room Thermostat
Item Weight	0.1 Kilograms
Manufacturer	ESI Controls
Manufacturer Part Number	0753677550889
Manufacturer Warranty Description	3 year manufacturer.
Model Number	ESRTP4RF+
Mounting Type	Wall Mount
Number of Batteries	2 AA batteries required.
Number of Items	1
Number of Packs	1
Power Source	Battery Powered
Product Style	Single
Special Features	Programmable
Specific Uses For Product	Boiler
Specification Met	energy
Temperature Control Type	Heating
UPC	753677551336 753677550889
Unit Count	1.0 count
Voltage	24 Volts

ESI - Energy Saving Innovation Controls ESRTP4RF+ Wireless Programmable Room Thermostat, White

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