2
DKRCI.PI.HU0.C2.ML / 520H8949
© Danfoss A/S (MWA), 2015-03
ENGLISH
Installation
Refrigerants
Applicable to HCFC, HFC and R717(Ammonia).
Flammable hydrocarbons are not
recommended.
The valve 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 valves are designed for a max.
working pressure of 28 bar g (406 psi g).
Technical data
The ICV PM can be used in suction, liquid, hotgas
and liquid/vapor lines. The ICV PM regulates
the flow of the medium by modulation or on/
off function, depen ding on the control impulse
from the screwed on pilot valve or valves.
Regulating range
Dependent on the chosen type and combination
of pilot valves.
Opening differential pressure (p)
The ICV PM main valve requires a minimum
opening differential pressure of 0.07 bar (1 psi)
to begin to open and 0.2 bar (3 psi) to be
completely open.
The valve must be protected
against back pressure. A check
valve should be installed upstream
of the ICV PM in installations where
there is a risk of back pressure. Back
pressure can affect the correct position
of the piston ring.
Design (fig. 4)
1.
Body
2.
Top cover
3.
Function module
3a Valve plate (Teflon)
(available as spare part)
3b Washer plate
4. Gasket
5. Bolts
6. Plug
7. Gasket
8.
Manual operating spindle
9.
Plug
10. Gasket
11. Silver label with pressure information
Installation
The valve must be installed with the spindle in
vertically upwards position (fig. 1).
The valve must be installed with the arrow in the
direction of the flow and the top cover upwards
(fig. 2). The top cover can be rotated 4 X 90° in
relation to the valve body.
The valve is fitted with a spindle for manual
opening. If an external pilot valve is used, the
pilot line must be connected to the upper side
of the main line so that any dirt and oil from the
plant will not find its way into the pilot line.
If the ICV PM is to be used as a solenoid valve in
a liquid line, external control pressure cannot
be recommended because it can cause liquid
hammer.
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.
The internal surfaces of the enclosed
ICV PM 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 assembled just prior
to the installation.
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.
Mounting of valve flanges
• Make sure that piping into which a valve/
flange 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.
• Make certain that the mating surfaces of
gasketed joints are free of rust and are in good
condition.
• Use only new gaskets manufactured by
Danfoss.
• Make sure that the bolts are adequately
tightened in an alternating pattern.
• Use only original Danfoss stainless steel bolts
provided with the valve. Stainless steel bolts
offer corrosion protection and they ensure
safe operation across the design operating
range of the valve when installed properly.
Note: Stainless steel bolts have a slightly lower
yield strength compared to carbon steel bolts.
Be careful not to over-tighten the bolts.
• Ensure that flanges / valves are properly
pressure tested, leak tested, evacuated before
charging with refrigerant in accordance with
ANSI /IIAR 5, EN378-2 or ISO 5149-2.
ICV PM 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.
Silver label (fig. 4, pos. 11)
Inside the ICV PM box you’ll find a small silver
label with pressure information. Please place this
label on the top cover.
Tightening (fig. 5)
Tighten the top cover with a torque wrench,
to the values indicated in the table.
Colours and identification
The ICV PM valves are Zinc-Chromated from
factory. If further corrosion protection is required,
the valves can be painted.
Precise identification of the valve is made via the
ID plate on the top cover.
Protection of the ID plate when painting the
valve is recommended.
Maintenance
Service
The ICV PM valves are easy to dismantle.
Do not open the valve while the valve is still
under pressure.
Pressure relief can be done by carefully opening
the manual operating spindle. Small grooves
along the thread will release refrigerant into
open air. This operation must only be done after
providing the correct countermeasures under
local legislation.
The function module can be lifted out using a
bolt size M6 screwed into the threaded hole of
the piston on the function module (fig. 3). Debris
blocking the bolt hole will need cleaning.
Upon opening and removal of the function
module:
- Check that the o-rings on the function
module has not been damaged. A
valve with a damaged o-ring might not
modulate according to the specification.
- 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 is damaged it must
be replaced. Kit including valve plate can be
found in ICS spare part documentation.
Assembly
Remove any dirt from the body before the valve
is assembled. Check that all channels in the valve
are not blocked by particles or similar.
If possible, apply some refrigeration oil to ease
the insertion and to protect the o-rings.
Tightening (fig. 5)
Tighten the top cover with a torque wrench, to
the values indicated in the table.
Always carry out this operation when the
manual operation device has been in use
(see fig 6)
1. Remove the cap (
A
) and tighten the
spindle (
B
) anticlockwise with 8 Nm
(5.9 lb/ft)
2. Remount the cap (
A
) and tighten it
clockwise with 8 Nm (5.9 lb/ft)
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.
