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Installation
Refrigerants
ICM 20:
Applicable to HCFC, non flammable HFC, R717
(Ammonia) and R744 (CO
)
2
ICM 25-65:
Applicable to HCFC, non flammable HFC, R717
(Ammonia), R744 (CO
) and R1234ze
2
Flammable hydrocarbons are not recommend-
ed. The valve is only recommended for use in
closed circuits. For further information please
contact Danfoss.
Temperature range
Media:
–60/+120°C (–76/+248°F)
Ambient: –30/+50°C (–22/+122°F)
Pressure
The valves are designed for a max.
working pressure of 52 bar g (754 psig).
Technical data
ICM is a balanced valve which remains in its
position. Return function must be provided with
the actuator used.
The ICM can be used in suction, liquid, hot gas,
and liquid/vapour lines. The ICM regulates the
flow of the medium by modulation or on/off
function, depending on the control impulse to
the actuator. Refer to the technical leaflet for
details on design and regarding selections.
The ICM valve is designed for use with the ICAD
actuator from Danfoss. The ICAD actuator on the
ICM ensures compatibility with the regulators
provided by Danfoss plus a range of other
controllers, especially PLC controllers. A control
signal from a Danfoss controller or PLC will
activate the ICAD motor and through a magnetic
coupling rotate the spindle in the ICM to make
the cone move vertically.
Valve cone
A V-shaped regulating cone provides
optimum regulation accuracy.
Valve sizes
ICM is available in sizes from ICM 20-A
(k
: 0.6 m
/h) to ICM 65-B (k
: 70 m
3
v
v
Modular valve concept
The ICM valve can be delivered as a parts
program or a complete valve depending on
the combination of parts wanted to form the
selected and needed valve.
If the valve is delivered as a parts program it
will consist of a valve body, a complete function
module, and an actuator.
Installation
ICM + ICAD can be installed in horizontal
pipelines with the actuator pointing upwards
(fig. 1).
The top cover of the ICM can be turned 90° in
any direction without any influence on the valve
function. The motor can be mounted in any
position before locking it with the 4 Allen screws
(fig. 5, pos.13).
The ICM valve must be installed with the
arrow in the direction of flow.
When installing an ICM, refrigerant must not be
allowed to escape and dirt must not be allowed
to enter the valve.
The valve 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
valve is protected from pressure transients like
"liquid hammer" in the system.
ICM 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
© Danfoss | DCS (MWA) | 2015.05
capped off, for example with a welded-on end
plate.
Welding (fig. 3)
The top cover, complete with function module,
should be removed before welding to prevent
damage to O-rings and Teflon (PTFE) in the
function module and to avoid getting welding
debris in the module.
Note:
Remove all parts from the valve body
before welding (as shown in fig. 3).
Especially on ICM 20 it is important to
remove the seat
(fig. 5, pos. 15) as the heat will damage
the seat.
Reassemble and tighten with hexagon
key 12 mm (2 Nm).
The internal surfaces and weld
connections of the enclosed ICS/
ICM valve have been applied with
an anti-corrosion treatment.
In order to maintain the effectiveness of this
anti-corrosion treatment, it is important to
ensure that the valve is disassembled just
prior to the welding / brazing process being
undertaken.
In the event that the function modules
are to be left disassembled for any length
of time, please ensure that the function
modules are further protected by placing
in a polyethylene bag or by applying a rust
protection agent (e.g. refrigeration oil or
BRANOROL) on the surfaces.
Only materials and welding methods,
compatible with the valve body material, must
be welded to the valve body. The valve should
be cleaned internally to remove welding debris
on completion of welding and before the valve
is reassembled.
Avoid welding debris and dirt in the
valve body and the function module. The valve
body must be free from stresses (external loads)
after installation.
Manual operation
A magnetic coupling can be used to rotate
the spindle manually if the actuator has been
removed. To make use of the manual operation,
a multi-function tool (optional) is used (see fig.
6). The code numbers for the multi-function
tools are:
/h).
3
ICM 20 – ICM 32: 027H0180
ICM 40 – ICM 65: 027H0181
Manual operation is also possible with the
actuator mounted on the valve and the power
supply connected to the actuator. No matter if
the signal connections are wired to the actuator
it will be possible to use the manual operation
function built into the actuator electronics
allowing the motor to step in 1% increments
meaning that 100 steps will correspond to a
fully open valve. Please refer to the separate
instruction on ICAD to address the manual
function.
Insulation
Insulating the valve and its actuator is only
necessary if an energy consideration in the plant
requires this. Regarding the function of the ICM +
ICAD no insulation is necessary when kept inside
temperature limits.
Surface treatment and identification
The ICM valves are Zinc-Chromated from factory.
If further corrosion protection is
required, the valves can be painted.
Note:
Magnet coupling must be protected.
Precise identification of the valve is made via
the ID plate on the top cover. After welding, the
external surface around the connections of the
valve body must be protected to prevent against
corrosion with a suitable coating.
Protection of the ID plate when repainting
the valve is recommended.
Assembly
Remove welding debris and any dirt from pipes
DKRCI.PI.HT0.A5.ML / 520H2713
and valve body before assembly. Check that the
cone has been fully screwed back towards the
top cover before it is mounted in the valve body.
Use the manual magnetic tool (fig. 6) to achieve
rotation through the top. A small amount of
refrigeration oil on both O-rings can make the
insert easier to install into the valve body.
Tightening
Tighten the top cover/function module with a
torque wrench, to the values indicated in the
table (fig. 7).
Maintenance
Service
A precise service schedule cannot be given for
the valve as service intervals will depend on
operating conditions, i.e. how often the valve
operates and the amount of impurities and dirt
the system carries. The ICM valves are easy to
dismantle and all parts inside can be replaced by
changing the function module.
Do not open the valve while the valve is still
under pressure.
Be aware that the valve can be under pressure
from both sides and that the manual magnet
tool (fig. 6) can be used to open the seat
and thus equalize pressure internally before
removing the top cover.
If the Teflon ring (fig. 4, pos. 19) has been
damaged, the Teflon must be machined or
replaced according to the condition of the parts.
Dismantling the valve (fig. 2)
Do not remove the function module while the
valve is still under pressure.
- (1) Upon removing the 4 bolts twist the mod-
ule 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.
Replacement of the function module
The function module is easily replaced.
Remove the existing module (fig. 2):
(1) Upon removing the 4 bolts twist the mod-
ule 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.
The spindle inside the valve must
not be greased or oiled (fig. 4).
If the valve seat has been dismounted, the ICM
top must remain loosely connected to this. The
two Allen screws that are holding the insert
should not be tightened for the alignment to be
precise.
Use only original Danfoss parts, including o-rings
and gaskets for replacement. Materials of new
parts are certified for the relevant refrigerant.
In cases of doubt, please contact Danfoss.
Drawings are only for illustration, not for
dimensioning or construction.
Danfoss accepts no responsibility for errors
and omissions. Danfoss Industrial Refrigeration
reserves the right to make changes to products
and specifications without prior notice.
The following text is applicable to the UL
listed products ICM 20-65
Applicable to all common non-flammable
refrigerants, including/excluding (+) R717 and
to non-corrosive gases/liquids dependent on
sealing material compatibility (++). The design
pressure shall not be less than the value outlined
in Sec. 9.2 of ANSI/ASHRAE 15 for the refrigerant
used in the system. (+++).
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