Emerson EX2 Instrucciones De Funcionamiento

G e n e r a l i n f o r ma t i o n :
The EX2 Series is an electronically controlled
expansion device. The capacity is defined through
pulse width modulation. The primary application is for
display cases and small cold rooms in commercial
refrigeration such as supermarkets.
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 operate the valve at atmospheric pressure.
• Ensure that the system piping is grounded.
• Do not use any other fluid media without prior
approval of EMERSON. Use of fluids not listed
could result in: Change of hazard category of
product and consequently change of conformity
assessment requirement
accordance with European pressure equipment
directive 14/68/EU.
• Ensure that design, installation and operation are
according to European
standards/regulations.
Emerson Climate Technologies GmbH
Am Borsigturm 31 I 13507 Berlin I Germany
Electronic Expansion Valve EX2
M o u n t i n g l o c a t i o n : ( s e e F i g . 1 )
• The EX2 should be installed in a position, which
allows the enclosing tube to be above the horizontal
axis (preferred: vertical position ± 45°). If the
enclosing tube is lower than the body of the valve,
particle may accumulate causing inconsistent
operation.
• A filter drier mounted upstream of the valve is
recommended
contaminates.
I n s t a l l a t i o n :
• Do not remove seal caps until ready for installation in
order to minimize entering of moisture and dirt.
• The seal caps should be removed with care to avoid
damaging the extension tube connections.
• Direction of flow must match with arrow on valve
body.
• After Brazing open the valve to allow evacuation of
system prior to charging with refrigerant.
B r a z i n g : ( s e e 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
for product in
appropriate solutions.
• To avoid oxidization, it is advised to purge the
system with an inert gas such as nitrogen while
brazing.
and national
• To avoid overheating it is advised to make the joint
at one end cool the device completely before
repeating the procedure on the other end connection.
• Do not exceed the max. body temperature of
100 C!
I n s t a l l a t i o n C o i l :
• For coil mounting please refer to corresponding
operating instructions of coil
www.emersonclimate.eu
Operating instruction
to protect the valve against
Date: 10.03.2017
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 European pressure equipment
directive 14/68/EU.
- to maximum working pressure of system for other
applications.
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.
T i g h t n e s s T e s t :
Conduct a tightness test according to EN 378-2 with
appropriate equipment and method to identify leakages
of external joints.
O p e r a t i o n :
Note: EX2 is mainly designed for use in liquid line.
Prevent to operate the valve under vacuum condition or
lack of liquid refrigerant in system.
T e c h n i c a l D a t a :
• Maximum working pressure PS: 40 bar
• Test pressure PT: 44 bar
• Medium temperature: -40... +65°C
• Connection sizes (ODF):
- EX2-M00 metric: 10 mm inlet, 12 mm outlet,
- EX2-I00 imperial: 3/8" inlet,1/2" outlet.
• Compatibility:
- Refrigerants: R22, R404A, R507, R134a, R407C,
- HFO, HFO blends
- Oils: Mineral, Alkyl benzene and ester lubricants.
• Permissible coils: ASC 24/230V, 50 Hz (AC)
• Marking: pending
EX2_OI_ML_R11_862379.docx