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ENGLISH
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 o , for example with a welded-
on end plate.
Surface protection and identi cation
(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 2, 4 or 6 function
modules.
Maintenance ( g. 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 at gaskets and/or
O-rings between the function module
and the housing and O-rings on the
function module has not been damaged.
Replace at gaskets and O-rings if not
intact.
A valve with damaged O-rings or at gaskets
do not regulate in accordance with its
speci cations.
Flat gaskets are present in ICF 15 module
M1/M2 and ICF 20-2/ICF 25/ICF SS 25 all
modules.
Rubber gaskets are present in these locations:
(see g 4a, 4b)
ICF 15: 1 rubber gasket in each module
M3/M4
ICF 20-4/6 and ICF SS 20-4/6: 1 rubber gasket
in all modules
CO
applications
2
When used in CO
systems the
2
O-rings (see g. 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 20C defrost module for CO :
Make sure that the module is type
ICFD 20C
6 | AN13978644420802-001501
-
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. (Allen key 12 mm, torque 2 Nm
(1.5 ft lb)).
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, 6 and 7)
Tighten the top cover with a torque wrench, to
the values indicated in the table (see g. 5).
Operating the manual stem ( g. 6 to 8)
ICF 15, ICF 20, ICF SS 20 ( g. 6a and 6b)
- ICFS/ICFS SS - stop valve module
- ICFR/ICFR SS - manual regulating valve module
- ICFN/ICFN SS - stop/check valve module
- ICFO/ICFO SS - manual opening module
Before remounting the cap on the modules
ICFS/ICFS SS (stop valve module), ICFR/ICFR SS
(manual regulating valve module) or ICFN/ICFN
SS (stop/check valve module) please ensure that
the gasket is present in the cap. Then tighten the
cap with 16 Nm (12 ft lbs).
ICF 25, ICF SS 25 (see g. 7a)
- ICFS/ICFS SS - stop valve module
- ICFR/ICFR SS - manual regulating valve module
- ICFN/ICFN SS - stop/check valve module
- ICFE/ICFE SS - manual opening module
Before remounting the cap on the modules
ICFS/ICFS SS (stop valve module), ICFR/ICFR SS
(manual regulating valve module) or ICFN/ICFN
SS (stop/check valve module) please ensure that
the gasket is present in the cap. Then tighten the
cap with 24 Nm (18 ft lbs).
Packing gland (ICFE/ICFE SS) (see g. 7b):
If the packing gland is leaking, tighten it
carefully with a wrench. Do not apply too much
force.
Danfoss recommends that you conduct a
stepwise tightening of the packing gland. For
each turn check for possible leaks.
Operating the manual stem on ICFE 25/ ICFE SS
25 solenoid module (see g. 8a):
To force open the solenoid by the manual stem
turn it counter clockwise full way up (manual
mode).
To operate the solenoid in automatic mode, turn
the manual stem clockwise until the locking ring
stops.
Do not force the spindle further. If the locking
ring is damaged or removed the spindle will
start to leak.
The valve cannot be forced closed by the
manual stem.
Operating the manual stem on ICFE 20H/ICFE
SS 20H solenoid valve module (see g. 8b)
Remove the cap on the side of the ICFE 20H/ICFE
SS 20H
At 9 o'clock position the manual opener is
disabled (not active).
To force the ICFE 20H/ICFE SS 20H solenoid to
open use a 5 mm Allen key and turn it clockwise
to 3 o'clock position.
ICFD defrost module
Transportation protection
Remove the transport security device (pos. 1
in g 10). Insert the drain plug + alu gasket
attached to the valve (pos. 2 in g 10) and
tighten with the torque indicated.
Test pressure maximum
If the system test pressure needs to exceed:
ICFD 20 (Ammonia):
28 bar g / 406 psi g
ICFD 20C (CO ):
52 bar g / 754 psi g
it is necessary to prepare the ICFD module like
shown in g. 11:
1.
Unscrew the 6 ange bolts and remove
the Float housing.
2. + 3. Unscrew and remove the Lever together
with the Float assembly using A/F 4 mm.
Caution - oat end of lever must not
be unscrewed and do not use oat for
unscrewing.
4.
Remount the Float housing and tighten
the 6 ange bolts with the torque
indicated in g 10.
5.
Test with the system pressure higher
than:
ICFD 20 (Ammonia): 28 bar g /
406 psi g
ICFD 20C (CO ): 52 bar g /
754 psi g
6.
Reinstall the Lever together with the
Float assembly using A/F 4 mm.
Do not use oat for tightening.
7.
Remount the Float housing and tighten
the 6 ange bolts with the torque
indicated in g 10.
It is recommended to replace the oat housing
gasket with a new gasket after this repeated
compression.
Operating the manual stem on ICFD defrost
module (see g. 12)
Remove the cap on the side of the ICFD (pos. A
in g. 10).
At 9 o'clock position the manual opener is
disabled (A = Automatic mode).
To force the ICFD to open use a 5 mm Allen key
and turn it clockwise to approx.
2 o'clock position till it reaches the mechanical
stop (M = Manual open mode).
Allways return the manual opener to automatic
mode for normal operation.
Remount the cap A in g 10 and tighten with
torque 80 Nm (59 ft lbs).
It is recommended to replace the Alu gasket if
further openings of cap are required.
Operating the manual stem on ICFG 25 (see
g. 8a)
Always pay attention to the spindle during
operation of the manual opener
1. Make sure that the locking ring is positioned
on the spindle and is intact. A new locking
ring is available in the inspection kit for the
valve.
2. Pay attention to the locking ring reaching the
top nut of the packing gland when turning
the manual stem clockwise for opening the
valve.
Never use excessive torque and stop
turning when the locking ring gets in
contact with the top nut.
3. When turning the spindle counter clockwise,
for deactivation of the manual opener, to the
top point, tighten the spindle further
counter clockwise to 8 Nm (5.9 lb/ft) torque.
© Danfoss | Climate solutions | 2022.06
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