Bedienungsanleitung Ygnis VARINO GRANDE (Seite 31 von 33) (Englisch)

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VARINO GRANDE 350 - 600

We reserve the right to make changes to dimensions and construction 29 Edition 10.07.2015

10. Maintenance

maintenance or cleaning work can be carried out on the boiler or burner by the operator. The following points

must be observed for optimum operation:

- The combustion chamber must be kept clean

- A fresh air supply must always be guaranteed

- The connection between the waste gas pipes of the condensing unit and the waste gas unit must be gas and

condensate leak-tight.

Periodical checks and maintenance operations

- Check manometer with circulation pump off. Low water or pressure level indicates that the system must be

filled up with water. Observe the required water quality according chapter 4.2.

- Check that the expansion chambers function properly

- Check safety valves as well as heating and hot water system blowers

- Check the internal siphon of the unit in the condensate drain. It must be filled with water.

- Clean the air filter(s) (and check the gas filter on the optional 300 mbar version)

- Boiler and chimney cleaning: The waste gas collector of the condensing unit is equipped with a cleaning

cover for the activities of the chimney sweep. After this person has finished his work, make sure that the

cover is carefully mounted, in order to prevent the uncontrolled escape of waste gases and condensate as

well as intrusion of air (which results in an incorrect O2 signal).

- The water chamber below the heat exchanger is equipped with a cleaning cover. After you have drained the

boiler water, this cover allows you to check whether sludge has collected in the boiler. Use the scraper

delivered with the unit to remove the sludge. Then carefully close the cover. Refill while observing the

required water quality according chapter 4.2. After you have refilled the system, check for leaks.

The devided version of the boiler (VG-TB) is furthermore equipped with an inspection cover above the heat

exchanger. The packing of this cover is to be checked for tightness during the annual boiler inspection.

- Annual general boiler and burner check by the customer service.

Notes: Cleaning work on the boiler is normally not required and may only be carried out after having

dismantled the igniter and the O2-sensor.

Dismantling and reinstallation of the burner are to be carried out in accordance with instructions from

the manufacturer.

Maintenance work on the burner may only be carried out by specialists trained on the product.

The device contains components made of synthetic silicon mineral fibres (glass fibres, insulation

wool). In order to avoid all types of health hazards, suitable clothing and a protective mask must be

worn for work on or with these components.

11. Spare parts

Available at your customer service.

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