Solar 3C 3C382B, Инструкция по установке, эксплуатации и обслуживанию, Страница: 19 / 38

10. Servicing and maintenance
10.1. A competent unvented hot water installer must only carry out servicing and maintenance.
10.2. Before any work whatsoever is carried out on the installation, it MUST first be isolated from the
main’s electricity supply.
WARNING: BOTH THE PRIMARY AND SECONDARY SYSTEMS WILL CONTAIN VERY HOT WATER THAT
WILL SCALD, THEREFORE CARE SHOULD BE TAKEN WHEN OPENING ANY JOINTS, SEALS OR VALVES.
10.3. Only use spare parts authorised by Solar 3C. The use of unscheduled spare parts will invalidate the
warranty.
10.4. Drain the cylinder – When draining the cylinder, always switch off the boiler and the immersion
heater first. Turn off the water supply at the stopcock (Figs 1a and 1b). Connect a hose pipe to the
drain cock (Figs 1a and 1b) and route it to a convenient gully. Open the drain cock and all hot taps
that are served by the cylinder. The cylinder may take several minutes to empty completely.
10.5. In hard water areas it may be necessary from time to time to remove and de-scale the immersion
heater element. Replace the gasket each time it is removed.
10.6. Remove the cartridge from the pressure-reducing valve (PRV). Check the strainer and if necessary
remove any debris from in front of it. Replace the cartridge.
10.7. Check the charge pressure in the expansion vessel and top up as necessary. The charge pressure
should be 3 bar.
10.8. Flush system inline with current Building Regulations at time of installation.
10.9. Close the drain cock, disconnect the hose, and refit the immersion heater and close all hot water
taps before reopening the stopcock. Allow the cylinder time to fill whilst checking for any leaks.
Release any air from the system by opening each hot water tap individually, starting with the one
furthest from the cylinder.
10.10. Manually lift the expansion relief, temperature and pressure relief valve one at a time, every 12
months (more frequently in hard water areas) to prevent debris from building up behind the
valve seat. Whilst carrying out this operation, check that the discharge to waste is unobstructed.
Check that each valve seals correctly when released. As the valves are pre-calibrated, they require no
further maintenance.
10.11. Finally switch on the mains electricity supply to the immersion heater and the boiler. As the system
heats up, check again for any leaks and rectify as necessary.
19