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ICFG 25: Disassembly/assembly module ICFG 25: Demontage und montage des moduls ICFG 25: Démontage/montage
du module ICFG 25: Desmontaje/montaje del módulo ICFG 25: Desmontagem/montagem Módulo ICFG 25: Demontaż/
Montaż modułu ICFG 25:
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ENGLISH
Refrigerants
Applicable to HCFC, non ammable HFC, R717
(Ammonia) and R744 (CO ).
Exception:
ICFD is designed for ammonia and CO only
ICFD 20 = ammonia version
ICFD 20C = CO version
The use of ICF valve stations with ammable
hydrocarbons is not recommended.
The ICF is only recommended for use in closed
circuits. For further information please contact
Danfoss.
Temperature range
ICF in general:
–60/+120 °C (–76/+248 °F)
ICFD 20:
-50/+50 °C (-58/+122 °F) at
28 bar g (406 psi g)
ICFD 20C:
-50/+50 °C (-58/+122 °F) at
52 bar g(754 psi g)
Pressure range
The general ICF is designed for:
Max. working pressure: 52 bar g (754 psi g)
ICF 20-2 housing with 65 bar function modules
only:
Max. working pressure: 65 bar g (943 psi g)
ICFD 20 (Ammonia):
For ICF with ICFD module the max. working
pressure is 28 bar g / 406 psi g. If the
refrigeration system include ICFD 20 module,
a test pressure of the system must not exceed
28 bar g / 406 psi g, unless the ICFD oat is
temporarily taken out before test. See g. 11.
ICFD 20C (CO ):
For ICF with ICFD 20C module the max.
working pressure is 52 bar g / 754 psi g. If the
refrigeration system include ICFD 20C module,
a test pressure of the system must not exceed
52 bar g / 754 psi g, unless the ICFD 20C oat is
temporarily taken out before test. See g. 11.
Application
The ICF can be used in suction, liquid, hotgas
© Danfoss | Climate solutions | 2022.06
ICFG 25: 拆卸/安装模块
/
ICFG
and liquid/vapor lines. The ICF is available with
2, 4 or 6 function modules. The ICF regulates
the flow of the medium by modulation or on/
o function, depending on function modules
installed in the ICF.
Regulating range
Dependent on the chosen type and combination
of modules installed in the valve.
Installation ( g. 1)
The ICF must be installed according to
g. 1. The ICF must be installed with the arrow in
the direction of the flow).
ICM, ICFD and ICFG modules require
horizontal valve orientation.
The ICF will be delivered with all the function
modules fully assembled. The modules can be
taken out for service or inspection and may be
rotated 4 x 90° in relation to the valve body upon
installation. Please make sure that the position
of ICFD allows space for modules
at each side of the ICFD.
The ICF may be fitted with a spindle for manual
opening of the solenoid valve.
The ICF is designed to withstand a high internal
pressure. However, the piping system should
be designed to avoid liquid traps and reduce
the risk of hydraulic pressure caused by thermal
expansion.
It must be ensured that the ICF is protected from
pressure transients like "liquid hammer" in the
system.
Welding ( g. 2 and 3)
The ICF valve station can be welded by using
either TIG/MIG/SMAW welding ( g. 2) or gas
welding/ brazing ( g. 3 a/b).
Always keep inlet and outlet protecting caps on
the valve until the valve is ready to be installed,
in order to prevent rust formation inside the
valve station.
TIG/MIG/SMAW welding
It is not necessary to remove any of the function
modules prior to TIG/MIG/SMAW welding ( g.
2) and auxiliary cooling is not needed at normal
heat impact.
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At excessive heat impact due to high ambient
temperature, sun radiation, a wet cloth is
recommended around the valve housing.
Every precaution must be taken to minimize
welding spatter.
For ICF valve stations equipped with a stop valve
in the rst module (M1) and a stop-, regulating-
or stop/check valve in the last module (M4 or
M6), it is recommended to open these valves
slightly (approx. 1 turn from closed position)
to minimize welding heat impact to the Te on
seats.
After welding it is recommended to close these
valves again to avoid potential pull through of
gases, and keep them closed until the system is
ready for operation.
All other valve modules are able, in any module
position, to compensate for normal welding heat
impact and need no special attention.
Gas welding/ brazing
Remove all inserts before welding/ brazing ( g.
3 a/b).
Auxiliary cooling needed when brazing
( g. 3b) to reduce heat impact.
Follow these steps during brazing ( g. 3b):
1.
Remove topcover/insert
2.
Clean connections with cleaning agent
3.
Wrap around wet cloth
4.
Apply ux on piping ends
5.
Apply inert gas internal
6.
Heat up piping
7.
Braze with recommended brazing material
and within temperature range speci ed
8.
Remove risidual ux
Every precaution must be taken to minimize
welding spatter.
After welding, clean the valve inside for welding
spatter and welding debris.
It is recommended to reinstall the modules right
after welding and to close the manual-operable
M1 and M4/M6 in order to protect the interior of
the valve until the system is ready for operation.
In case the valve is not assembled immediately
make sure that rust protective oil is applied to
the inside surfaces.
AN13978644420802-001501 | 5
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