Danfoss 027H8414 Руководство по установке - Страница 2
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ENGLISH
Installation
Refrigerants
Applicable to HCFC, HFC, R717(Ammonia) and R744
(CO
).
2
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 52 bar g / 754 psi g.
Application
The ICSH is designed for the hotgas line to open
for the flow in 2 steps - 20% and 100%. The valve
includes 2 identical EVM NC pilot valves with 2
identical coils energized in a controlled sequence
by an external controller like PLC.
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.
Needle housing
12.
Flat gasket
Installation
The ICSH can be oriented as shown in fig. 1 and
must be installed with the arrow in the direction of
the flow (fig. 2).
The top cover can be rotated 4 X 90° in relation to
the valve body.
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.
Welding (fig. 3, 4 and 5)
The top cover (fig. 4, pos. 2) and function module
(fig. 4, pos. 3), must 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.
Caution: After removing the top cover make sure
to protect the vital parts protruding the underside
of the cover. Never lay aside with the bottomside
down (see fig. 3)
The function module can be lifted out using a bolt
size M6 or multi-function tool screwed into
the threaded hole of the piston on the function
module (fig. 3a). Debris blocking the bolt hole will
need cleaning.
Note:
Remove all parts from the valve body
before welding (as shown in fig. 5).
The internal surfaces and weld
connections of the enclosed ICSH
valve has been applied anti-corrosion
protection.
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.
© Danfoss | DCS (MWA) | 2018.04
Only welding materials and welding methods
compatible with the valve housing material must
be used. The valve should be cleaned internally to
remove welding debris on completion of welding
and before the valve is reassembled.
The valve body must be free from stresses (external
loads) after installation.
The valves must never 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.
Assembly
Remove welding debris and any dirt from pipes and
valve body before assembly. Check that the o-rings
are intact before replacing the function module. If
possible, apply some refrigeration oil to facilitate
the insertion and to protect the o-rings. Check that
the top gasket has not been damaged. If the surface
has been damaged or the gasket has been bent,
it must be replaced.
Tightening/Operation of Manual spindle (fig.6)
Tighten the top cover with a torque wrench to the
values indicated in the table.
If the manual opening spindle needs to be
activated it is important not to exceed 15
Nm in any directions.
Corrosion protection and identification
The ICSH valves are Zinc-Chromated from factory.
The Zinc-Chromatization does not cover the
welding areas.
The external surface of the valve housing must be
protected against corrosion with a suitable top
coating after installation involving welding and
consequent assembly.
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.
Configuration
The ICSH can be configured to 2 operation modes:
1. Dependent mode
The functioning of the valve is always relaying on
the opening of step 1. Only when step 1 is working
properly the step 2 can be mechanically activated.
2. Independent mode:
The full opening of the valve can be controlled
independent of the state of step 1. If the partly
opening of step 1 is not performed the fully
opening can be done by activation of step 2.
Note: When choosing the independent
configuration there is a risk of hydraulic shock
due to instant full opening.
Dependent configuration is done by installing the
2 EVM's in port SI and SII, and blanking off port P by
Plug A+B. See fig. 7a.
The SI coil must be activated some period of time
before SII being activated.
Independent configuration is done by installing the
2 EVM's in port SI and P, and blanking off port SII by
Plug A+B. See fig. 7b.
The SI coil must be activated some period of time
before P being activated.
The control of activating the coils is done by a PLC or
a PLC / Timer (see fig. 8) and the required time delay
must be decided based on in situ trials.
Wiring
The wiring of the 2 coils can be done directly by 2
wires from the controller, or by 1 wire controlling
step 1 (SI) directly in parallel with a Timer relay
controlling step 2. See fig. 8.
Maintenance
Service
The ICSH valves are easy to dismantle.
Do not open the valve while the valve is still under
pressure.
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
regulate 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. It is available as spare part:
Type
ICS 25 repair kit
ICS 32 repair kit
ICS 40 repair kit
ICS 50 repair kit
ICS 65 repair kit
ICS 80 repair kit
For mounting instructions please see
DKRCI.PI.HS0.D.
Assembly
Remove any dirt from the body before the valve is
assembled. Check that all channels in the valve are
not blocked by any particles.
If possible, apply some refrigeration oil to facilitate
the insertion and to protect the o-rings.
Tightening/Operation of Manual spindle (fig.6)
Tighten the top cover with a torque wrench to the
values indicated in the table.
If the manual opening spindle needs to be
activated it is important not to exceed 15
Nm in any directions.
Note:
Always pay attention to the spindle during
operation of the manual opener
1. Pay attention to the C-clip reaching the top
of the spacer between C-clip and manual
stem top nut when turning the
manual stem clockwise for opening the valve.
Never use excessive torque and stop
turning when the C-clip gets in contact
with the spacer.
2. When turning the spindle anticlockwise,
for deactivation of the manual opener, to the
top point, tighten the spindle further
anticlockwise to 8 Nm (5.9 lb/ft) torque for
back-seating.
3. Remount the cap and tighten it clockwise
to 8 Nm (5.9 lb/ft) torque.
If the manual opener or needle housing
assembly is damaged it must be replaced.
It is available as spare part:
Type
ICSH-25 Needle Housing Assembly
ICSH-32 Needle Housing Assembly
ICSH-40 Needle Housing Assembly
ICSH-50 Needle Housing Assembly
ICSH-65 Needle Housing Assembly
ICSH-80 Needle Housing Assembly
DKRCI.PI.HS4.A3.ML | 520H12096 | 2
Code number
027H2219
027H3017
027H4015
027H5015
027H6017
027H6017
Code number
027H8413
027H8414
027H8415
027H8416
027H8417
027H8418