Danfoss ICF 50-4 Guide D'installation page 5

ENGLISH
Refrigerants
Applicable to HCFC, non flammable HFC,
R717 (Ammonia) and R744 (CO
The use of ICF valve stations with flammable
hydrocarbons is not recommended.
The ICF is only recommended for use in
closed circuits. For further information
please contact Danfoss.
Temperature range
-60 – 120 °C / -76 – 248 °F
Pressure range
The ICF is designed for a max. working
pressure of 52 bar g / 754 psi g.
Application
The ICF can be used in suction, liquid,
hotgas and liquid/vapor lines. The ICF
regulates the flow of the medium by
modulation or on/off function, depending
on function modules installed in the ICF.
Regulating range
Dependent on the chosen type and
combination of modules installed in the
valve.
Orientation (fig. 1)
The ICF must be installed according to
fig. 1. The ICF must be installed with the
arrow in the direction of the flow).
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 (fig. 1b).
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 (fig. 2 and 3)
The ICF valve station can be welded by
using either TIG/MIG/SMAW welding (fig. 2)
or gas welding (fig. 3).
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 (fig. 2) and auxiliary cooling is not
needed at normal heat impact.
Every precaution must be taken to
minimize welding spatter.
To avoid any welding spatter entering the
valve station and to avoid heat impact
to the Teflon seat during welding, it is
© Danfoss | DCS (MWA) | 2021.01
recommended to open the valves slightly
(approx. 1 turn from closed position) in first
and last module (M1 and M4).
When welding is completed it is
recommended to close the 2 modules
).
2
again (M1 and M4) in order to protect the
interior of the valve until the system is
ready for operation.
Gas welding
Remove all inserts before welding (fig. 3).
Auxiliary cooling is not needed at normal
heat impact.
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 2
modules again (M1 and M4) 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.
Mounting of valves
- Make sure that piping into which a valve
is installed is properly supported and
aligned square and plumb to the joining
sections.
- Ensure that the finalized valve assembly
is free of any stresses from external loads.
- Use only new gaskets manufactured by
Danfoss.
- Ensure that installed valves are properly
pressure tested, leak tested, evacuated
before charging with refrigerant in
accordance with ANSI /IIAR 5, EN378-2 or
ISO 5149-2.
The enclosed valves must not be mounted
in systems where the outlet side of the
valve is open to atmosphere. The outlet
side of the valve must always be connected
to the system or properly capped off, for
example with a welded-on end plate.
Side port connections (fig. 12)
The ICF features 2 groups of 2 individual
side ports. The 2 smaller ports P1 and
P3 are intended for service devices like
service valve, gauge or sight glass, while
the bigger ports P2 and P4 can be used for
defrost drain from the evaporator when
doing defrost (typically hot gas).
P2 and P4 can be converted to side ports
similar to P1 and P3 by installing separate
accessories (see the ICF data sheet).
Surface protection and identification
The external surface is zinc-chromated to
provide corrosion protection according to
EN 12284:2003 8.13.
The Zinc-Chromatization does not cover
the welding connections. After installation
has been completed the external surface
of the valve must be protected against
corrosion with a suitable top coating.
Coverage of the ID label when painting the
ICF is recommended.
Precise identification of the ICF is made
via the ID label on each of the 4 function
modules.
Maintenance (fig. 4)
Service
The ICF valve stations are easy to service.
Do not open the ICF while it is still under
pressure.
Upon opening and removal of the
modules:
- Check that the flat gaskets and/or
O-rings between the module
and the housing and O-rings on the
function module has not been damaged.
Replace flat gaskets and O-rings if not
intact.
A valve with a damaged o-ring/gasket
might not modulate according to the
specification.
Flat gaskets and O- are present in the
locations shown in fig. 4.
CO applications
2
When used in CO
2
the O-rings (see fig. 4) can swell
(grow).
At service it is recommended to replace
the actual number of used O-rings before
the modules are reinstalled in the ICF valve
body.
Assembly
Remove any dirt from the housing before
the ICF is assembled.
- Check that all channels in the ICF
are free of particles or similar debris.
If possible, apply some refrigeration oil
to ease the insertion of the modules and
to protect the O-rings.
Tightening (fig. 5)
Tighten the top covers and plugs with a
torque wrench, to the values indicated in
the table (see fig. 5).
Replacing or servicing the function
module in the ICS, ICM, ICLX and ICSH
modules:
ICS/ICSH module (fig. 6)
Remove the top cover.
The function module can be lifted out
using a bolt size M6 or multi-function
tool screwed into the threaded hole of
the piston on the function module (fig.
6). Debris blocking the bolt hole will need
cleaning.
- Remove the old module.
- Oil the O-rings on the new module with
a small amount of refrigeration oil.
ICM module (fg. 7)
Remove the existing module (fig. 7):
1. After removing the 4 bolts twist the
module approx. 45° in either direction.
2. Push two screwdrivers in between the
top cover and the valve body.
3. Pull the screwdrivers upwards to release
the function module and its o-rings.
- Remove the old module.
- Oil the O-rings on the new module with
a small amount of refrigeration oil.
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