DG · Edition 08.13
17
บริษัท เอดีดี เฟอร์เนส จ ำกัด
ADD FURNACE CO.,LTD.
44 ซอยบรมราชชนนี
70 ถนนบรมรำชชนนี แขวงศำลำธรรมสพน์ เขตทวีวัฒนำ กรุงเทพฯ 10170
โทร
: 02-888-3472
โทร
:
ออกแบ
บ
:
08-08-170-170
แฟกซ์
: 02-888-3258
https://www.add-furnace.com E-mail:
5 Project planning information
5 .1 Installation
Installation in the vertical or horizontal position, or sometimes
upside down, preferably with vertical diaphragm.
If installed in a vertical position, the switching point p
S
will
correspond to the scale value SK set on the hand wheel. If
installed in another position, the switching point p
S
will change
and no longer correspond to the scale value SK set on the
hand wheel. Switching point p
S
must be checked.
All DG models (except DG..I)
DG 1,5I
DG 12I
p
S
= SK
p
S
= SK + 0.5 mbar
e.g. SK = 5:
p
S
= 5 + 0,5 = 5.5 mbar
e.g. SK = -10:
p
S
= - 10 + 0.5 = -9.5 mbar
DG 18I, DG 120I, DG 450I
p
S
= SK
DG 18I: p
S
= SK + 0.5 mbar
e.g. SK = - 10:
p
S
= - 10 + 0,5 = - 9.5 mbar
DG 120I, DG 450I: p
S
= SK + 0.2 mbar
The housing must not be in contact with masonry. Minimum
clearance 20 mm.
The DG..S is suitable for oxygen and ammonia only (diaphragm made
of IIR). Do not use for fuel gases – diaphragm not resist- ant! In the
case of oxygen, ensure grease-free installation.
Continuous operation at high temperatures (e.g. maximum ambient
temperature) accelerates the ageing of elastomer materials and
reduces the service life (please contact manu- facturer). Ozone
concentrations exceeding 200 µg/m³ or gases containing more than
0.1 %-by-vol. H
2
S accelerate the ageing of elastomer materials and
reduce the service life
.
Ports 3 and 4 are connected to the micro switch chamber. The port that is
best protected against soiling (dust/humidity) is to be left open for ventilation
(positive pressure measurement) to the atmosphere. If dust exposure in the
environment is high, a filter pad, see page 20 (Restrictor orifice), or a filter
are to be used in the open port.
Combustion gas or a mixture of combustion gas and air must not be
connected to port 3 or 4.
Condensation must not be allowed to get into the housing (if possible,
install pipework with an ascending gradient). Otherwise, there is a risk of icing
of condensation at subzero temperatures, the switching point shifting or
corrosion in the device which can lead to malfunctions.
2
1
3
4
p
S
= SK
p
S
= SK + 0.18 mbar
p
S
= SK - 0.18 mbar
p
S
= SK
p
S
= SK + 0.4 mbar
e.g. SK = 1.2:
p
S
= 1.2 + 0,4 = 1.6 mbar
e.g. SK = -1.2:
p
S
= - 1.2 + 0,4 = -0.8 mbar
