Drazice OKC 300 NTRR/SOL 운영 및 설치 매뉴얼 - 페이지 12

{카테고리_이름} Drazice OKC 300 NTRR/SOL에 대한 운영 및 설치 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Drazice OKC 300 NTRR/SOL 17 페이지. For solar systems
Drazice OKC 300 NTRR/SOL에 대해서도 마찬가지입니다: 작동 및 설치 매뉴얼 (12 페이지)

페이지 인쇄

2.3 PLUMBING FIXTURE

Every hot utility water pressure tank shall be equipped with membrane spring loaded

with safety valve. Tanks 300 l are not equipped with safety valve. If the tanks 200 and 250 l

enclosed safety valve 0.6 MPa. Safety valve shall be easily accessible, fitted as close as

possible to the tank.The inlet pipes must have at least the same clearance as the safety valve.

Safety valve is placed high enough to secure dripping water drain by gravity. We recommend

mounting the safety valve onto a branch pipe. Easier exchange without the necessity of

draining water from the tank. Safety valves with fixed pressure settings from the

manufacturer are used for the assembly. The starting pressure of the safety valve must be

identical to the maximum allowed tank pressure, and at least 20 % higher than the maximum

pressure in the water main. If the water main pressure exceeds such value, a reduction valve

must be added to the system. During assembly, follow the guide provided by the safety

equipment manufacturer. The cold water inlet of each individually closable heater must be

fitted with a seal, test tap or plug to check the non-return valve, as well as a non-return valve

and safety valve. Heaters with a volume of more than 200 litres must also be fitted with

a pressure gauge.

It is necessary to check the safety valve each time before putting it into operation. It is

checked by manual moving of the membrane from the seat, turning the make-and-break

device button always in the direction of the arrow. After being turned, the button must click

back into a notch. Proper function of the make-and-break device results in water draining

through the safety valve outlet pipe. In regular operation, such a check needs to be carried

out at least once a month, and after each shutdown of the tank longer than 5 days. Water

may be dripping off the drain pipe of the safety valve; the pipe must be open into the air,

pointed down; environment temperatures must not drop below zero. When draining the

tank, use the recommended drain valve. First of all, close water inlet in the tank.

Find necessary pressure values in the below Table 4. For proper safety valve operation, a backflow valve

shall be mounted on the inlet pipes that prevent spontaneous draining of the tank and hot water

penetration back into the water main. We recommend that the hot water distribution from the tank was

as short as possible to minimise heat losses. At least one demountable joint must be mounted between the

tank and every supply pipe. Adequate piping and fittings with sufficiently dimensioned maximum

temperature and pressure values must be used.

SAFETY VALVE

START-UP

PRESSURE [MPa]

0.6

0.7

Table 4

ACCEPTABLE OPERATING

OVER-PRESSURE OF WATER

TANK [MPa]

0.6

0.7

MAXIMUM

PRESSURE IN COLD

WATER PIPES [MPa]

up to 0.48

up to 0.56

up to 0.8

- 12 -