Ideal Boilers LOGIC MAX HEAT H 18, Installation & Servicing

43

Installation and Servicing

SECTION 3 - SERVICING

3.1  SERVICING SCHEDULE

F

or the very latest copy of literature for specification & maintenance practices, visit our website www.idealboilers.com, where you 

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WARNING.

  Always turn OFF the gas supply at the gas service cock, and switch OFF and disconnect the electricity 

supply to the appliance before servicing.
Combustion testing must be carried out by a competent person using a combustion analyser conforming to BS7927.

To ensure the continued safe and efficient operation of the appliance it is recommended that it is checked at regular intervals and 

serviced as necessary.  The frequency of servicing will depend upon the installation condition and usage but should be carried out 

at least annually.  
It is the law that any service work must be carried out by a Gas Safe Registered Engineer. In IE service work must be carried out 

by a Registered Gas Installer (RGII).

GENERAL

Please Note

: During routine servicing, and after any 

maintenance or change of part of the combustion 

circuit, the following must be checked:
- 

The integrity of the flue system and the flue seals,

-  The integrity of the boiler combustion circuit and 

the relevant seals

-  The operational (working) gas inlet pressure at 

maximum rate.

-  The gas rate
-  The combustion performance.

COMPETENCE TO CARRY OUT THE CHECK 

OF COMBUSTION PERFORMANCE

Please Note

: 

BS 6798:2009 Specification for 

installation and maintenance of gas-fired boilers of 

rated input not exceeding 70kW net advises that:
-  The person carrying out a combustion 

measurement should have been assessed as 

competent in the use of a flue gas analyser and 

the interpretation of the results.

-  The flue gas analyser used should be one meeting 

the requirements of BS7927 or BS-EN50379-3 

and be calibrated in accordance with the analyser 

manufacturer’s requirements, and

-  Competence can be demonstrated by satisfactory 

completion of the CPA1 ACS assessment, which 

covers the use of electronic portable combustion gas 

analysers in accordance with BS7967, Parts 1 to 4.

Flue Sampling Point

Air Sample

Point

Ensure all caps and seals

are re-fitted after use

SER

VICING

Note

.  In order to carry out either servicing or replacement of components 

the boiler front panel must be removed.  Refer to Section 3.2.

PRELIMINARY INSPECTION

1.

  Light the boiler and carry out a pre-service check, noting any 

operational faults (refer to appropriate fault finding chart as 

necessary).

2.

   Check the flue terminal (and terminal guard if fitted) is undamaged 

and clear of any obstruction.

3.

   Check combustion by connecting the flue gas analyser to the flue 

gas sampling point as shown in the diagram and measure CO and 

CO

2

 at maximum rate. To set the boiler to Maximum and Minimum 

heat inputs see page 66. Repeat at minimum rate.

  If the CO / CO

2

 ratio is greater than 0.004 please proceed to 

“Cleaning Procedure”.

  If the CO / CO

2

 ratio is less than 0.004 please proceed to     “Check 

Procedure”.

CHECK PROCEDURE

1. 

Check all water and gas joints for signs of leakage.  Remake any 

suspect joints ensuring a gas tightness check is carried out if 

applicable and the water system is correctly refilled, vented and re-

pressurised.

2.

  Proceed to “IMPORTANT”.

CLEANING PROCEDURE

1.

  Clean the main burner. Refer to Section 3.4.

2.

  Clean the heat exchanger & condensate trap/siphon. Refer to 

Section 3.5 & 3.6.

3.

  Check the main injector for blockage or damage. Refer to  Section 3.3.

4. 

The cleaning procedures are covered more fully in Sections 3.3 - 3.6 

and MUST be carried out in sequence.

5.   

For cleaning of the Ideal System Filter please refer to section 3.21.

6.

   Proceed to “IMPORTANT”.

Do not operate the boiler if the front panel is not fitted.

IMPORTANT

1. 

If, for any reason, the condensate trap/siphon has been removed, 

ensure the trap is refilled with water before re-assembling.

2. 

After completing the servicing or exchange of components always 

ensure all gas valve connections are gas tight with a gas soundness 

check up to the gas control valve.

3. 

When work is complete the front panel MUST be correctly refitted, 

ensuring that a good seal is made.

4. 

Clean the Ideal system filter, refer to system filter installation and 

maintenance guide for correct method of servicing. 

5.

   Complete the service section in the Benchmark Commissioning 

Checklist.