Danfoss ICF 15 Guia De Instalacion página 6

ENGLISH
- 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.
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 fig. 5).
Operating the manual stem
(fig. 6 to 8)
ICF 15, ICF 20, ICF SS 20 (fig. 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 fig. 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 fig. 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.
6 | AN13978644420802-001101
Operating the manual stem on ICFE 25/
ICFE SS 25 solenoid module (see fig. 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
fig. 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 fig 10). Insert the drain plug + alu
gasket attached to the valve (pos. 2 in fig
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 (CO₂): 52 bar g / 754 psi g
it is necessary to prepare the ICFD module
like shown in fig. 11:
1. Unscrew the 6 flange bolts and
remove the Float housing.
2. + 3. Unscrew and remove the Lever
together with the Float assembly
using A/F 4 mm.
Caution - float end of lever must not
be unscrewed and do not use float
for unscrewing.
4. Remount the Float housing and
tighten the 6 flange bolts with the
torque indicated in fig 10.
5. Test with the system pressure higher
than:
ICFD 20 (Ammonia): 28 bar g /
406 psi g
ICFD 20C (CO₂): 52 bar g /
754 psi g
6. Reinstall the Lever together with
the Float assembly using A/F 4 mm.
Do not use float for tightening.
7. Remount the Float housing and
tighten the 6 flange bolts with the
torque indicated in fig 10.
It is recommended to replace the float
housing gasket with a new gasket after this
repeated compression.
Operating the manual stem on ICFD
defrost module (see fig. 12)
Remove the cap on the side of the ICFD
(pos. A in fig. 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 fig 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.
© Danfoss | DCS (MWA) | 2018.11