Eco Range 15/21, Instructions For Use Installation And Servicing

Boiler: 

INTRODUCTION 

Thank you for choosing our condensing oil boiler, please read the following carefully. 
 

To the installer 

This manual must be left with the householder by the installer who will instruct the user on the boiler 
operation. 
 

To the user 

Please read the user section of this manual to familiarise yourself with the boiler operation 
 

WARRANTY 

WARRANTY FOR YOUR BOILER MUST MEET THE FOLLOWING 

CONDITIONS OR YOUR WARRANTY MAY BE INVALID 

Warranty on the Heat Exchanger: 

5 Years (Excludes labour) 

Warranty on Burner and Controls: 

2 Years 

 
CONDITIONS OF WARRANTY: 

1.

Boiler MUST BE 

installed

 by an OFTEC registered engineer, if not permission will be required by 

building control. 

2.

Boiler MUST BE 

commissioned

 after installation by an OFTEC registered engineer. 

3.

Boiler MUST BE 

serviced

 every 12 months after installation by an OFTEC registered engineer. 

4.

Installer MUST COMPLETE an 

Installation/Commission Form

, which will be found along with your 

manual and this, must then be returned to the address on the warranty form. Failure to return this form 
may invalidate your warranty. 

WHAT IS A CONDENSING BOILER AND HOW DOES IT WORK? 

On all standard boilers the flue gases that go up the chimney have quite a high temperature (200°C / 260°C) 
and are made up of a few different types of gases. A condensing boiler is designed so that these flue gases 
pass through a stainless steel heat exchanger connected to the boiler. These flue gases transfer heat to the 
water contained in the secondary heat exchanger. 
 
This results in  (a) increasing the temperature of the water returning to the main boiler 
 

(b) Converting some of the flue gases into condensate 

(c) Lowers the exit flue gas temperatures considerably (Less than 85°C) 

This all results in increased efficiency in the boiler and therefore a saving on oil. 
 

IMPORTANT CHANGES TO BOILER MANAGEMENT: 

Annual Service

 –This is very important in order to keep the flue ways clean and ensure the boiler is 

correctly set. 
 

Quarterly Check

 – empty and clean the condensing trap (Fig.4) 

Always ensure that the condensate is flowing freely through the outlet into the drain. This can get dirty and 
block flow or it can freeze in extreme conditions. 
 

Plume

 – a condensing boiler, which produces a white plume from the flue into the air. This is caused by the 

low flue gas temperatures mixing with the colder air outside. 
 

Best performance: 

Radiator Heating System 

- Flow Temperature  70°C 

- Return Temperature  50°C 

Underfloor Heating System 

- Flow Temperature  50°C 

- Return Temperature  40°C 

 
 
 
Note: return temperature should never be less than 40°C