- ページ 14

ボイラー Drazice OKC 160 NTR / BPのPDF 操作および設置マニュアルをオンラインで閲覧またはダウンロードできます。Drazice OKC 160 NTR / BP 18 ページ。 Stationary water heaters
Drazice OKC 160 NTR / BP にも：操作および設置マニュアル (17 ページ), 操作および設置マニュアル (12 ページ), 操作および設置マニュアル (20 ページ), 操作および設置マニュアル (20 ページ), 操作および設置マニュアル (18 ページ), 操作および設置マニュアル (20 ページ), 操作および設置マニュアル (13 ページ)

entire cold water supply piping. It is therefore advisable to drain all fittings and piping that

carry water, up to the part where the house water meter is installed (connection of the

house to water main) which is not jeopardised by frost. When the tank is to be used again,

it has to be filled with water and one needs to make sure that the water flowing out at the

hot water valves did not contain any bubbles.

2.8 INSPECTION, MAINTENANCE & CARE FOR THE APPLIANCE

During the heating process the water that increases its volume during the heating must drip

off the safety valve outlet (in non-pressurised connection this water drips off the

combination faucet valve). In full heating (about 65 °C) the volumetric water gain is approx.

3% of the tank capacity. The function of the safety valve has to be checked regularly (based

on the information contained in the attached safety valve manual). In common operation,

such a check needs to be implemented at least once a month, and after each heater

shutdown that exceeds 5 days.

Caution! In doing so, the cold water supply pipe and the connection fitting of the tank may

get heated! If the hot water heater does not work, or if hot water is not withdrawn,

no water shall drip off the safety valve. If water drips, then the pressure in the supply piping

is either too high, or the safety valve is defective. Please call a specialised plumber

immediately!

If water contains too many minerals, an expert has to come to remove the scale that forms

inside the tank, as well as free sediments. This has to be performed after one or two years

of operation. Repetitive water heating causes limestone sediment on both the tank walls and

chiefly the flange lid. The sedimentation depends on the hardness of water heated, its

temperature, and amount of hot water consumed.

We recommend checking and cleaning the tank from scale and eventual replacement of

the anode rod after two years of operation. The anode life is theoretically calculated for two

years of operation; however, it changes with water hardness and chemical composition

in the place of use. Based on such an inspection, the next term of anode rod exchange may

be determined. Have the company in charge of service affairs clean and exchange the anode.

When discharging water from the heater, the mixing valve battery for hot water must

be open in order to avoid creating underpressure that would prevent water discharge. The

cleaning is carried out through the hole in the flange by: draining the boiler, dismantling the

flange lid and cleaning the tank. A new sealing has to be used for re-fitting. Since the inside

of the heater has special enamel, the surface of which must not get in contact with a scale

removing agent – do not work with a lime pump. Remove the lime layer with a timber and

suck it off, or wipe it off with a clout. After that, the appliance must be rinsed thoroughly and

the heating process is checked the same as during the initial putting in operation. Do not use

any abrasive cleaning agents or dye thinners to clean the outer shell of the heater (such as

cellulose thinner, trichlor, and the like). For cleaning use a wet clout and add a few drops of

liquid cleaning agent for household applications.

- 14 -