Airec Compact 25 설치 및 유지 관리 매뉴얼 - 페이지 4

{카테고리_이름} Airec Compact 25에 대한 설치 및 유지 관리 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Airec Compact 25 6 페이지. Compact series heat exchangers

Pressure vessels

The product type Compact is manufactured according to the Euro-
pean Directive for Pressure Equipment (PED 2014/68/EU).
The pressure rating for the Compact is depending on the model
and type, please see respective Product Data Sheet on
www.airec.com and/or contact Airec.
For copper brazed Compact the maximum operating wall temper-
ature is 220°C (428°F) and for nickel brazed the maximum operat-
ing wall temperature is 350°C (662°F).
Note: The gas temperature may be considerably higher than the ma-
terial temperature provided there is sufficient coolant temperature
and flow.
For divergent operating conditions, please contact Airec.
For approved units, the data on the label must not be exceeded at
any circumstances. The heat exchangers are designed for use
with fluids according to group 1 and 2 in AFS 2016:1.
For operating conditions concerning the European approval PED,
please see Product sheets on www.airec.com. For more details on
the respective approvals, please contact Airec.
Installation
Personal protection
Suitable protective clothing i.e. goggles, gloves and shoes shall be
worn whilst installing and/or maintenance of heat exchangers.
Please be aware of: - filled heat exchangers might be heavy, - heat
exchangers can be hot from high temperature operation, - con-
densate might be corrosive/caustic.

Connecting the Compact to the system

Compact can be installed in both vertical and horizontal direction.
Horizontal
Note! For condensing application, the installation is recommended to
be Vertical with Gas-flow from top – down through the heat ex-
changer, and condensation connection must be at lowest point to
avoid build-up of condensate inside the heat exchanger.
Flow direction of the fluids into the Compact heat exchanger can
be either:
Concurrent = fluids flow in the same direction through the heat
exchanger
or
Counter-current = that the fluids will move in the opposite direc-
tion through the heat exchanger.
Please consult the system drawings for the flow directions for the
Compact heat exchanger.
Countercurrent
Vertical
Concurrent

Mounting Compact

When mounting the Compact treat the heat exchanger with care
and do not use excessive force, bending or welding on the heat
exchanger.
Never expose the Compact heat exchanger to excessive pulsa-
tions (i.e. cyclic pressure or temperature changes). It is also
important that no vibrations are transferred to the unit. If there is
a risk of this, install vibration absorbers/muffler. For large connec-
tion diameters, we advise you to use an expanding device in the
pipeline. If installation allow it is also suggested that a buffer is
installed between the Compact and the support.
Regardless if the heat exchanger is mounted horizontal or vertical
the heat exchanger must have full support.
Do not install the Compact only to the connections as it will give
too high stress on the connections.
Airec suggest mounting according to below example. Support legs
and stud-bolts in different versions and locations are available as
option, please contact Airec.
Support from
Bracket
the bottom
Mounting stud bolts for BPHEs are available as an option. These
stud-bolts are welded to the BPHE. The maximum allowable loads
on the stud bolts during assembly are stated in below table.
Tension force
M6
M8
M10
The maximum allowable connection loads given below are valid
for low cycle fatigue. If high cycle fatigue is involved special
analysis should be made.
The following limits for moment should
not be exceeded.
Max. Traction
Connection
[N]
Coolant
6000
Condensate
3000
Gas
6000
Welding/Soldering Connection and Pipe
When soldering; degrease and polish the surface. Apply flux, note
that flux properties make it potentially very aggressive and it is,
therefore, important to use the correct amount of flux, as too
much might lead to severe corrosion. No flux must be allowed to
enter the heat exchanger. Insert the copper tube into the
connection, hold it in place and braze with min. 45 % silver solder
at max. 450ºC (840ºF) when soft soldering and 450-800ºC (840-
1470 ºF) when hard soldering. Do not direct the flame at the
Compact. Use a wet rag to avoid overheating the Compact.
Protect the heat exchanger interior from oxidation with N
Excessive heating may cause serious damage to the heat
exchanger.
Stud-bolts
Support legs
Torque moment
F
[N]
M
[Nm]
T
T
1200
3,8
2400
9,5
3600
19
Max. Bending
Torque
Moment
Moment
[Nm]
[Nm]
50
150
20
70
50
150
2
gas.