Caleffi solar 278 series 설치 및 시운전 매뉴얼 - 페이지 7
{카테고리_이름} Caleffi solar 278 series에 대한 설치 및 시운전 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Caleffi solar 278 series 8 페이지. Solar pump stations
페이지 인쇄Shut-off and check valves
The
shut-off
valves
are
equipped with a built-in check
valve, positioned inside the ball.
1. To allow the passage of the
medium in both directions, the
ball valves must be opened to
45° using a 9 mm hex wrench
(supplied with unit).
The check valve is opened by
the ball, see figure (A).
2. In normal system operation,
the ball valves must be fully
open.
Correct
Incorrect
position
position
Air separator
The solar pump stations with supply and return connections (279
series) are equipped with an air separator on the flow line. The gases
separated from the heat transfer medium collect at the top of the air
separator. The collected gases must be evacuated from time to time
(every day after putting into operation and afterwards, depending on
the quantity of air, once a week or once a month) by opening the
manual air vent with a suit-
ably sized screwdriver.
To
maintain
optimal
efficiency of the solar
thermal system, after-
wards, it is necessary
to discharge air from the
system every six months
using the air separator.
A
Flow meter
The flow meter is a flow rate measuring device, float equipped, with
an adjustment ball valve.
The meter has a range of 2 to 8 gpm.
The flow meter must always be installed in a vertical position.
Thermometric
label
A thermometric label on the back of the flow meter signals if the
maximum permitted temperature (230°F/110°C) has been exceeded:
white = temperature not exceeded;
dark = maximum temperature exceeded.
Warranty will be void if this label is removed.
The reading is taken from
the top edge of the float
8
7
6
5
Correction for different density liquids
Changes in flow rate readings remain within the indicated
accuracy (±10%) for glycol percentages of up to 50%.
Complete closing and opening of the valve
The valve can be fully
Fully closed
closed or fully open.
A
A slot on the valve
adjusting stem indicates
the status of the valve.
7
Captive nut
Flow rate adjustment
1/2" F fitting
Graduation
3/4" F fitting
Important! Use only a 9mm
hex wrench (supplied with unit)
to adjust the flow meter.
open
closed
Fully open
B