Emerson CV4-7 Serie Instrucciones De Funcionamiento

G e n e r a l i n f o r m a t i o n :
CV4-7 are stepper motor driven valves for precise
control of refrigerant mass flow in CO
(Fig.1)
- High pressure gas valve (A,)
- Bypass valve (B),
- Heat reclaim valve (C),
- Expansion valves (D),
- Suction pressure regulating valve (E)
S a f e t y i n s t r u c t i o n s :
• Read operating instructions thoroughly. Failure
to comply can result in device failure, system
damage or personal injury.
• According to EN 13313 it is intended for use by
persons having the appropriate knowledge and
skill.
• Before opening any system make sure pressure in
system is brought to and remains at atmospheric
pressure.
• Do not release any refrigerant into the
atmosphere!
• Do not exceed the specified maximum ratings for
pressure, temperature, and voltage.
• Do not operate system before all cable connections
are completed.
• Do not operate valve connected directly to supply
voltage. Use suitable stepper motor driver.
• Do not operate the valve when the compressor is
not running.
• Do not operate the valve when system is under
vacuum except for closure of valve before
refrigerant charging.
• Before installation or service disconnect all
voltages from system and device.
• Do not use any other fluid media without prior
approval of EMERSON. Use of fluid not listed
could result in a change of hazard category of
product and consequently change of conformity
assessment requirement
accordance with European pressure equipment
directive 2014/68/EU.
• Ensure that design, installation and operation are
according to European
standards/regulations.
M o u n t i n g l o c a t i o n / p o s i t i o n : ( F i g . 1 )
HR = Heat Reclaim, GC = Gas Cooler
High pressure gas valve (A), Bypass valve (B), heat
reclaim valve (C), Suction pressure valve (E):
- The motor needs to be pointed downward.
- The valve must be protected against contaminants by
an upstream filter or strainer.
Expansion valve (D):
- For best result, locate the valve as close as possible
to the distributor or inlet of evaporator. Install a sight
glass as well as a filter drier before the valve.
T e c h n i c a l D a t a :
Type
Maximum working pressure PS / Factory Test Pressure PT
Operating temperature
Nominal Supply Voltage U / Operating (moving) current peak
Holding current peak
Number of steps / Frequency
Stepping mode / Waveform
Winding resistance per phase /Insulating resistance
Marking
Emerson Climate Technologies GmbH
Am Borsigturm 31 I 13507 Berlin I Germany
High Pressure Valves
- The motor needs to
be pointed between
systems as:
2
downward
sideways.
- Check for sufficient refrigerant charge/subcooling
and make sure no flash gas is present at the inlet of
valve before attempting to check valve operation.
I n s t a l l a t i o n :
• Direction of refrigerant flow must match with arrow
on the label
Warning:
• All valves are delivered at half open. Do not
charge system before closing of bypass valve (B)
and
instruction of used driver/controller.
• The interior parts of valve must be protected against
moisture and water at any time. It is not permitted the
use of water, steam or any other solvent to clean the
inside of valve.
I n s t a l l a t i o n - b r a z i n g O D F
c o n n e c t i o n s : c o p p e r p i p i n g ( F i g . 3 )
• Perform and consider the brazing joint as per
EN 14324.
• Before and after brazing clean tubing and brazing
joints.
• Minimize vibrations in the piping lines by
appropriate solutions.
• Do not exceed
the max. body
temperature of
120°C!
- Use flux and
silver rod
having a
minimum of
30% silver.
for product in
Note: The valve connections are made of stainless steel
1.4305 contains 0.15...0.35% sulphur. According to
standards, it is not recommended to apply welding
and national
process for stainless steel 1.4305 with high content of
sulphur. (difficult to weld)
P r e s s u r e T e s t :
After completion of installation, a pressure test must be
carried out as follows:
- according to EN 378 for systems which must comply
with
2014/68/EU.
- to maximum working pressure of system for other
applications.
www.climate.emerson.com/en-gb
Operating instructions
Series CV4-7
to
Fig.2
expansion valve (D). See
Fig.3
European pressure equipment
CV4-HPV
Inlet: –50°C... +100°C / Outlet: -100°C...+100°C
24 VDC / 625 mA
100 mA
750 Steps / 500 Hz 750 Steps / 500 Hz
14 Ω ± 10% / > 20 MΩ 10Ω ± 10% / > 20 MΩ 10 Ω ± 10% / > 20 MΩ 10 Ω ± 10% / > 20 MΩ
Out of Scope of PED (no CE Marking required)
Date: 27.11.2019
Warning:
• Failure to do so could result in loss of refrigerant
and personal injury.
• The pressure test must be conducted by skilled
persons with due respect regarding the danger
related to pressure.
L e a k a g e T e s t :
Conduct a tightness test according to EN 378 with
appropriate equipment and method to identify leakages
of external joints. The allowable leakage rate must be
according system manufacturer's specification.
E l e c t r i c a l c o n n e c t i o n :
Warning:
• Entire electrical connections have to comply with
local regulations.
• Improper wiring will result wrong direction of
operating
rotation or no rotation of stepper motor.
• Prewired M12 plug and cable assembly (EXV-Mxx)
is ready for connection to the valve.
• Allow enough space when placing valve to mount
plug as shown in Fig.6.
• There is no specific
requirement for
positioning of plug on
pins.
Insert the plug on valve connecting port.
1.
Rotate the nut one turn in clockwise direction and
2.
push the plug.
Repeat this procedure until the plug is tightened.
3.
Wiring / Mounting to driver/Controller:
See the wiring diagram of applied driver/controller.
O p e r a t i o n :
See operating instructions of applied electronic driver/
controller.
S e r v i c e / M a i n t e n a n c e :
• For motor check, remove cable plug from valve. Use
an ohmmeter
suitable
Measure windings
resistance per phase at
opposite placed pins
acc. Fig.5 and data as
in the table below.
• CV4-7 has capability of positive shut-off when it is
driven to fully close position (as long as inlet pressure
directive is 0.5 bar above outlet pressure).
• CV4-7 can replace defective CX4-7, under
consideration by replacing driver EXD-U01 to EXD-
U02. For third party driver /controller, electrical
operating parameter settings must be adapted. (see
Technical data table)
CV5-HPV CV6-HPV
130 bar / 186 bar
24 VDC / 800 mA 24 VDC / 800 mA
300 mA 300 mA
750 Steps / 500 Hz
Full step
CV4/5/6: UL (No. MP604)
Fig.4
with
range.
Fig.5
CV7-HPV
24 VDC / 800 mA
300 mA
6400 Steps / 500 Hz
CV4-7_OI_ML_R03_866918.docx