Emerson Typ EXM Betriebsanleitung

Electronic Expansion Valves EXM/EXL
General information and technical data:
EXM/EXL are unipolar stepper motor driven
electronic expansion valves for precise control of
refrigerant mass flow in refrigeration systems.
!
Safety instructions:
• Read installation instructions
Failure to comply can result in device failure,
system damage or personal injury.
• It is intended for use by persons having the
appropriate knowledge and
attempting to install the valve make sure
pressure in system is brought to and remains at
atmospheric pressure.
• Do not release any refrigerant into the
atmosphere!
• Do not use any other fluid media without prior
approval of ALCO Controls. Use of fluid not
listed could result in:
Change of hazard category of product and
consequently change of conformity assessment
requirement for product in accordance with
European pressure equipment
97/23/EC.
• Do not operate valve connected directly to
supply voltage. Use applicable stepper motor
driver.
• Switch off all voltages / currents before cabling.
• Do not operate system before all cable
connections are completed.
• Compliance with local electrical regulations
when wiring.
Mounting location:
• The valve must be installed with head upside or
within ± 90° from upside as per Fig. 1.
• For best results locate the valve as close as
possible to the distributor or inlet of evaporator.
Installation:
• The valve has Bi-flow performance capability.
Technical Data
Type
Maximum working pressure at TS: –30°C to +70°C
Connection, DN
Fluid group
Refrigerant:
Date code - Made in Japan
Hazard category: PED 97/23/EC
Nominal Supply Voltage U:
Maximum Current Imax.:
Marking
EXML_65137__R01.doc
Operating Instructions
• Remove the coil by pulling it from valve prior to
brazing.
• Apply proper temperature for brazing of copper to
copper as the fittings of valve are solid copper.
• When brazing, direct flame away from valve. Use
wet rags or other suitable heat protection.
• Maximum body temperature must not exceed
thoroughly.
120°C during brazing.
• Protect the orifice of valve against entering particle
by means of installting filter or filter drier at the
inlet of valve or on liquid line.
skill. Before
Leakage test:
• After completion of installation, a test pressure
must be carried out as follows:
- According to EN378 for systems which must
comply with European pressure equipment
directive 97/23/EC
- To maximum working pressure of system for
other applications
Warning:
1. Failure to do so could result in loss of refrigerant
and person injury.
2. The pressure test must be conducted by skilled
directive
persons with due respect regarding the danger
related to pressure.
• 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 ALCO sight glass AMI or MIA before
the valve.
Wiring and mounting of coil:
• Prewired coil with cable length of approximately 1
meter is ready for connection to the electronic
board.
Wiring to driver/controller:
• See the wiring diagram of associated driver or
controller.
Warning: Improper wiring will result wrong
direction of rotation or no rotation of stepper motor.
Electrical operation:
Replacement for -
Emerson Electric GmbH & Co. OHG
GB
Heerstr.111 – D-71332 Waiblingen
Tel.: 07151 509-0 - Fax.: -200
www.emersonclimate.eu
EXM
PS: 45 bar
1/4" ODM
II
R 410A, R 407C, R 22, R 134a
xxxx
-
12 VDC for EXM-125
24 VDC for EXM-246
260 mA for EXM-125
130 mA for EXM-246
not applicable
07.12.2009
See operation manual of associated electronic
driver/controller.
Service hints:
• Do not apply motor voltage/current out of
specified range.
• For motor check, use an ohmmeter with suitable
range.
• Internal resistance between each winding is
49Ω for EXM/EXL-125 and 185Ω for EXM/EXL-
246Ω (See below)..
EXM/EXL-125
White
Winding ½
Orange
Yellow
Winding ¾
EXM/EXL-246
White
Winding ½
Red
(common)
Orange
Yellow Brown
Winding ¾ (common)
Dimensions see fig. 2
EXL
PS: 45 bar
1/4" ODF / 8mm ODM
II
R 410A, R 407C, R 22, R 134a
xxxx
-
12 VDC for EXL-125
24 VDC for EXL-246
260 mA for EXL-125
130 mA for EXL-246
not applicable
Blue Brown
(common)
Blue
Part No.: 865 021