Emerson EX4-6-...FLR Series Operating Instructions

G e n e r a l i n f o r ma t i o n :
EX4-7-...FLR are stepper motor driven valves for
precise control of refrigerant mass flow, released for
R290 in refrigeration, air conditioning, heat pumps,
industrial cooling process and close control systems.
Warning:
The qualification /certification of EX4-7-...FLR is
valid only in conjunction with EVC05A (M12
Connector).
The listed products are electrical devices and are in
compliance with EN60079-0/-15
94/9/EC therefore rated / marked as:
II 3G Ex nA IIA T3 Gc X
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.
• R290 requires special handling and care due to
its flammability. Good ventilation is required
during service of the system. Contact with
rapidly expanding gases can cause frostbite and
eye damage. Proper protective
(gloves, eye protection, etc.) has to be used.
• In a severely contaminated system, avoid
breathing acid vapors and avoid contact with
skin from contaminated refrigerant / lubricants.
Failure to do so could result in injury.
• Ensure that the system is correctly labeled with
applied refrigerant type and a warning for
explosion risk.
• 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!
• Ensure that the system piping is grounded.
• Do not exceed the specified maximum ratings for
pressure, temperature, voltage and current.
• Do not connect valve directly to supply voltage.
Use suitable stepper motor driver.
• Do not operate system before
connections are completed.
• 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.
• Ensure that design, installation and operation
are according to European and
standards/regulations.
M o u n t i n g l o c a t i o n :
• The motor needs to be pointed downward or
sideways (Fig. 1).
• For best result, locate the valve as close as possible
to the distributor or inlet of evaporator.
I n s t a l l a t i o n :
• Direction of refrigerant flow must match with arrow
on the label (except bi-flow valves).
• 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.
• Install an EMERSON sight glass MIA...-FLR and
an ADK....-FLR filter before the valve.
Emerson Climate Technologies GmbH
HolzhauserStr. 180 I 13509 Berlin I Germany
Operating instruction
Electronic Expansion Valves EX4-7-...FLR
Versions Released for R290 & M12 Connector
Warning:
• All valves are delivered at half open. Do not
charge system before closure of valve. See
operating instructions of used driver/controller.
• The interior parts of valve must be protected
against moisture and water at any time. It is not
permitted to use water, steam or any other
solvent to the inside of valve for cleaning
purpose.
Recommended external pipe connection:
Nominal pipe
connection
and directive
3/8"
5/8" / 16 mm
7/8" / 22 mm
1-1/8"
10 mm
28 mm
B r a z i n g : ( F i g . 2 )
• 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
equipment
120 °C!
• Use flux and silver rod having a minimum of 30%
silver.
P r e s s u r e T e s t :
• After completion of installation, a pressure test must
be carried out according to EN 378 for systems
which must comply with European pressure
equipment directive 97/23/EC.
• Max. system test pressure: 38.5 bar
W a r n i n g :
• 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.
T i g h t n e s s T e s t :
Conduct a tightness test according to EN 378-2 with
all cable
appropriate equipment and method to identify
leakages of external joints. The allowable leakage rate
must be
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
rotation, no rotation of stepper motor or
controller malfunction.
national
Wiring/ Mounting of Plug: (Fig. 4-6)
• 2 = White, 4
• Use only ATEX approved prewired M12 Connector
EVC05A for connection to the valve.
• See also EVC05A operating instructions for
connector mounting and required protection.
• There is no specific requirement for positioning of
plug on pins (see Fig. 5)
• Ensure that the cables are mounted without
tension; always leave the cable a bit loose.
• Ensure that cables are not mounted near sharp
edges.
• Do not bend or mechanically stress the cable
outlet, maintain a clearance of 20 mm to
neighboring parts.
www.emersonclimate.eu
EVC05A
Outside diameter
Min. (mm) Max. (mm)
9.47 9.55
15.80 16.05
21.95 22.25
28.50 28.63
9.95 10.05
27.95 28.05
according system manufacturer's
= Black, 3 = Blue, 1= Brown
Date: 05.10.2015
• During operation the connector EVC05A must
be protected by an appropriate housing against
external mechanical damage or shock (min.
required protection up to a mechanical action of
7 J - in accordance with EN60079-0)
• Cable end of EVC05A must be connected to a
driver/controller which is ATEX approved or
located out of hazard zone.
– If driver/controller is located out of hazard
zone, appropriate ATEX approved cable gland
shall be used in boundary of hazard zone and
out of hazard zone.
– If the cable needs to be extended in hazard
zone, it is mandatory to use ATEX approved
type coupling or junction box.
• Supply voltage shall never exceed 36 VDC at any
time to the valve.
Wiring / Mounting to driver/Controller:
See the wiring diagram of used driver or controller.
O p e r a t i o n :
• See operating instructions of used electronic
driver/controller.
• Perform a functional test of electrical circuit
before charging the system with refrigerant.
S e r v i c e / M a i n t e n a n c e :
• Defective EX4-7-...FLR valves must be replaced,
they cannot be repaired.
• Disconnect electrical power to driver/controller
before service.
• Before any debrazing ensure that the flammable
refrigerant is pumped out of the system and the
room around the system is well vented so no
refrigerant left.
• For motor check:
‒ Remove cable plug from valve under no voltage.
‒ Use an ohmmeter with suitable range.
‒ Measure windings resistance per phase at
opposite placed pins acc.Fig.6 and data as in the
table below.
• The lowest pressure inside system must be at
least 0.4 bar higher than ambient pressure at any
time. Failure to do so could accumulate air inside
the system and create an explosive mixture over
time.
T e c h n i c a l D a t a :
Type EX4-6...FLR
Max. allowable
working pressure PS: 35 bar
PS:
Operating temp. at Uni-flow versions:–50°C...+100°C
motor Bi-flow versions: -40°C...+80°C
Connection

Refrigerant: R290
Nominal Supply
Voltage to the valve 24 VDC
U:
Max. Current Imax.: 0.5 A
Winding resistance
13 Ω ± 10%
per phase
Marking
Yes
acc.to directive
94/9/EC
EX-FLR_OI_ML_R00_865916.docx
EX7...FLR
see Fig. 3

24 VDC
0.75 A
8 Ω ± 10%
Yes