© Danfoss | DCS (MWA) | 2017.11
DKRCI.PI.FT0.C9.ML | 520H5450 | 5
ENGLISH
Refrigerants
Applicable to HCFC, non flammable HFC,
R717 (Ammonia) and R744 (CO
2
).
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).
For ICF with an ICFD module the max.
working pressure is 28 bar g (406 psi g).
If the refrigeration system is including an
ICFD module a test pressure of the system
must not exceed 28 bar (406 psi g), unless
the ICFD float is temporarily taken out for
test purpose as shown in fig. 11.
Application
The ICF can be used in suction, liquid,
hotgas and liquid/vapor lines. The ICF is
available with 4 or 6 function modules. 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.
Installation (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).
ICM and ICFD 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 (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.
For ICF valve stations equipped with a stop
valve in the first 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 Teflon 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
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
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.
The housing must be free from stresses
(external loads) after installation. The
ICF must not be mounted in systems
where the outlet side of the ICF is open
to atmosphere. The outlet side of the ICF
must always be connected to the system
or properly capped off, for example with a
welded-on end plate.
Surface protection and identification
(not applicable for SS versions)
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 or 6 function
modules.
Maintenance (fig. 4)
Do not to mix up carbon steel
parts with stainless steel parts.
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 function
modules:
- Check that the flat gaskets and/or
O-rings between the function 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 are present in ICF 15 module
M1/M2 and ICF 25/ICF SS 25 all modules.
Rubber gaskets are present in these
locations: (see fig 4a, 4b)
ICF 15: 1 rubber gasket in each module
M3/M4
ICF 20/ ICF SS 20: 1 rubber gasket in
all modules
CO
2
applications
When used in CO
2
systems the
O-rings (see fig. 4a and 4b) can
swell (grow).
At service it is recommended
to replace the actual number of
used O-rings before the function
modules are reinstalled in the ICF
valve body.
ICFD defrost module:
Make sure that the ICFD module
is specified for CO
2
on box label
(special float).
- Check that the piston and cylinder is
free of scratches and look for wear
marks. If the wear is excessive the
function module should be replaced to
prevent false pilot signal around the
piston ring.
- Check that the movement of the
cylinder and valve seat is free and with
low friction.
- If the teflon valve plate has been
damaged, the function module must be
replaced.
- On ICM 20 motor valve modules check
that the PEEK seat has not been
damaged or scratched. If damaged or
scratched; replace the PEEK seat.
