Drazice OKCE 160 NTR Руководство по эксплуатации и установке - Страница 14

Просмотреть онлайн или скачать pdf Руководство по эксплуатации и установке для Котел Drazice OKCE 160 NTR. Drazice OKCE 160 NTR 19 страниц. Tank-type water heater for vertical mounting
Также для Drazice OKCE 160 NTR: Руководство по эксплуатации и установке (18 страниц), Руководство по эксплуатации и установке (13 страниц)

2.7 PUTTING OUT OF SERVICE, DISCHARGE

If the hot water heater is put out of service for a longer time, or if it is not going to be used

it has to be drained and disconnected from the electric supply network on all poles. The switch

for the supply lead or the fuse cut-outs have to be shut off.

At places with permanent risk of frost the hot water heater must be drained before the cold

season starts if the appliance remains out of service for several days and if the power supply

is disconnected.

Drainage of service water shall be performed after closing the shut-off valve in the cold water

supply piping (through the discharge valve for safety valve combination), and with simultaneous

opening of all hot water valves of connected fittings (water can be also drained through safety

valve; for that purpose, the safety valve is turned to the "Check" position). Hot water may

outflow during the drainage! If there is a risk of frost it has to be considered that not only

the water in the hot water heater and in the hot water piping may get frozen but also the water

in the 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 visibly

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

the combination faucet valve). In full heating (about 74°C) the volumetric water gain is approx.

3.5 % of the tank capacity. The function of the safety valve has to be checked regularly.

If the safety valve control knob is lifted or turned to the "Control" position, the water must flow

out easily, without any obstacles, from the safety valve element to the outfall line. In common

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

shutdown for more than 5 days.

Attention! 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 water pressure in the supply piping is either too

high (if higher than 5.5 bars, a pressure control valve has to be fitted), or the safety valve

is defective. Please call a specialised plumber immediately!

- 14 -