maintenance
Important
Maintenance is an essential part of the safe and efficient operation of the boiler and ensures its durability. It should be performed according to the instructions given in current legislation. Perform combustion analysis regularly in order to check the operating efficiency of the boiler and to make sure the combustion is within the boundaries set by current legislation.
Before beginning maintenance work:
-Disconnect the appliance from the electricity supply by turning the external bipolar switch to the “OFF” position;
-Remove the fuse;
-Close the gas valve and the central heating and domestic hot
water system valves.
After the work has been completed the initial settings will be restored.
General comments
It is recommended that the following inspections be carried out on the boiler at least once a year:
1.Check the seals in the water part and, if necessary, replace the gaskets and restore the seal to perfect working order.
2.Check the seals in the gas part and, if necessary, replace the gaskets and restore the seal to perfect working order.
3.Visually check the overall condition of the boiler.
4.Visually check the combustion and, if necessary, disassemble and clean the burner.
5.Following the inspection detailed in point “3”, disassemble and clean the combustion chamber, if necessary.
6.Following the inspection detailed in point “4”, disassemble and clean the burner and injector, if necessary.
7.Cleaning the primary heat exchanger
8.Make sure the following heating safety devices are operating correctly:
-temperature limit safety device.
9.Make sure that the following gas part safety devices are operating correctly:
-absence of gas or flame safety device (ionisation).
10.Check the efficiency of the domestic hot water production process (test the flow rate and temperature).
11.Perform a general inspection of the boiler operation.
12.Remove oxide from the detection electrode using an emery cloth.
13.After servicing, complete the relevant Service Interval Record section of the Benchmark Checklist located on page 54 of this manual.
14.These checks are not exhaustive. Further mechanical, electrical and combustion maintenance checks may be required.
15.Analyse combustion, see page 33.
Operational test
After having carried out the maintenance operations, fill the heating circuit at a pressure of approximately 1.5 bar and release the air from the system.
Fill the domestic hot water system at the same time.
-Begin operating the boiler.
-If necessary, release the air from the heating system again.
-Check the settings and make sure all the command, adjustment and monitoring parts are working correctly.
-Check the flue system is sealed and operating correctly.
Draining procedures
The heating system must be drained using the following procedure:
-Switch off the boiler, make sure the external bipolar switch is in the OFF position;
-Loosen the automatic air relief valve;
-Open the system drain off cock and collect the escaping water in a container;
-Empty the water from the lowest points of the system (where applicable).
If the system is to be left inactive in areas where the room temperature may fall below 0°C during winter, we recommend that
liquid is added to the water in the heating system in order to avoid the need for repeated draining; when this liquid is used make sure it is compatible with the stainless steel used for the bodywork of the boiler. We recommend the use of
Regularly check the pH level of the
DO NOT MIX DIFFERENT TYPES OF ANTI-FREEZE.
The manufacturer will not be held liable for any damage caused by the appliance or the system due to the use of inappropriate
Draining the domestic hot water system (E-COMBI)
Every time there is a danger of freezing, the domestic hot water system must be drained as follows:
-Shut off the water mains inlet valve;
-Open all the hot and cold water taps;
-Empty the water from the lowest points of the system (where applicable).
WARNING
Before handling, empty all components which may contain hot water, performing bleeding where necessary.
Descale the components in accordance with the instructions provided on the safety data leaflet supplied with the product used, make sure the room is well ventilated, wear protective clothing, avoid mixing different products, and protect the appliance and surrounding objects. Seal all openings used to take a gas pressure reading or to make any gas adjustments.
Make sure that the nozzle is compatible with the supplied gas.
If a smell of burning is detected or smoke is seen leaking from the appliance, or there is a smell of gas, disconnect it from the electricity supply, shut off the gas valve, open the windows and call for technical assistance.
Cleaning the primary exchanger
The inside of the primary exchanger is accessed by removing the burner. Wash with water and detergent using a
The trap is accessed by emptying the condensate bowl located in the bottom section. Wash with water and detergent.
Replace the condensate collection bowl in its housing.
NB: In the event of prolonged of the appliance, the trap must be filled before being used again.
A lack of water in the siphon is dangerous and may cause exhaust gases to be released into the atmosphere.
Combustion Analyses
Details for flue gas analyses can be found on page 33.
Using a suitable calibrated combustion analyser, perform a combus- tion check. The CO2 valus can be found on page 33.
if the vlues are correct the CO/CO2 ratio must be less than 0.004. Where combustion readings cannot be achieved carrefully check items such as the burner, heat exchanger, flue system for defect.
Once satisfactors readings hane been achieved complete the relevant service interval record selection of the Benchmark Commissioning Checklist at the rear of this publication.
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