ALCO CONTROLS OSH Serie Manual De Instrucciones

Emerson Electric GmbH & Co
Heerstr.111 - D 71332 Waiblingen
Tel.: 07151 509-0 - Fax.: -200
General information:
The function of oil separator is the separation of oil from hot gas of discharge
line and returning it back to the compressor or to the oil reservoir in systems with
multiple compressors.
!
Safety instructions:
• Read installation instruction thoroughly. 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
skill. Before attempting to install the shell make sure pressure in system is
brought to and remains at atmospheric pressure.
• Do not release any refrigerant into 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 directive
97/23/EC
• In a severely contaminated system, avoid breathing acid vapours and avoid
contact with skin from contaminated refrigerant / lubricants. Failure to do
so could result in skin injury.
• The oil separator must be used only for the purpose it is designed for.
Mounting location:
The oil separator should be installed as close as possible to the compressor(s) in
the main discharge line (Fig. 1 & 2) but after any installed muffler or vibration
adsorber.
(1) Oil separator
(2) Oil return line to compressor crankcase
(3) Compressor
(4) Condenser
(5) Oil level controller
(6) Connection line to suction line
(7) Differential oil pressure switch
(8) Oil reservoir
Caution: Prevent the migration of liquid refrigerant back into the oil separator
shell during off-cycles by one of the following recommendations:
• Install the oil separator in a location where it is higher than condenser.
• If the oil separator located slightly lower than condenser, install the line from
oil separator to the condenser at higher level than the condenser and with a
downward slope into the condenser inlet connection.
• In systems which the condenser located higher than the oil separator, it is
recommended the use of a check valve at outlet of oil separator.
Installation:
• Before proceeding with the installation, the oil separator must be charged
with certain amount of oil in order to actuate the float mechanism
immediately after start-up. Use the same type of oil as filled in the
compressor crankcase.
• 0.5 Liter initial oil charge for OSH/OST-4xx
• 0.6 Liter initial oil charge for OSB/OSH-6xx
• The oil must be charged through outlet connection.
• The oil separator shell must be mounted securely in a vertical position.
Warning: Protect the oil separator against vibration and gas pulsation generated
by compressor. Install the vibration adsorber and muffler between compressor
and oil separator.
• When brazing, direct flame away from shell. Use wet rags or other suitable heat
protection to prevent damage to the paint surfaces adjacent the fittings.
Technical Data
Type
Maximum working pressure
Volume (liter)
Temperature Range
Fluid group
Refrigerant: CFC, HCFC, HFC
Connection
Required Oil Charge (liter)
Date code (Made in Mexico)
Hazard category: PED 97/23/EC
0035 Marking
Other marking
Document Nr.: A6.5.055 02
ALCO CONTROLS
OSH-4..
Ps: 31 bar
2 ... 3.6
-10 ... +150°C
II
1/2" ... 1-5/8"
0.5
Mxxxx
I
√
UL
Replacement for A6.5.055 01
Operating Instructions
Oil separators OSB/OSH/OST
• Use correct temperature for brazing of copper to copper as the fittings of shell
are solid copper. Do not exceed 675°C flame temperature.
• The use of dry nitrogen through lines during brazing will prevent the oxide
scale (solid particles) forming on the inside of the brazed joints. These particles
can jam the float mechanism or clog the needle valve.
Caution: The oil separators OSB/OST with flange cap are incorporated a gasket.
Do not exceed +150°C around flange. If so, the gasket can be destroyed and it
must be replaced. Keeps the flange cap cool.
• The oil return line (minimum 3/8" or 10 mm tube) should be connected to the
compressor crankcase or to the oil reservoir in the systems with multiple
compressors.
• If the piping results in excessive stress to the joints of oil separator, the pipes
must be supported by suitable mounting bracket(s).
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 others applications
Warning:
1. 1) Failure to do so could result in loss of refrigerant and person injury.
2. 2) The pressure test must be conducted by skilled persons with due respect
regarding the danger related to pressure.
• In case of detection of leakage around flange of oil separators OSB and OST,
check the gasket and the tightness of bolts with 35 Nm torque. A spare gasket is
supplied with each OSB and OST oil separator.
• After leakage test, the unused spare gasket should be taped or hanged in a
position near oil separator for use when it is required.
Operation:
• After leakage test, start system. The oil level in compressor crankcase and in oil
reservoir must be watched after start-up, the first hours of operation and few
days later. The new refrigerant will adsorb some oil. It may a small portion of
oil to be trapped in the system somewhere in lines or heat exchangers.
• The oil separator removes the excess oil but this may not be retained in
compressor crankcase immediately.
• In normal operation, the oil return line to the compressor crankcase or to the oil
reservoir which will be alternatively hot and cold. This is caused by opening
and closing of the needle valve via lifting and lowering of the float mechanism.
• In outdoor installation at low ambient temperatures, the oil separator may be
needed to be protected against cold stream of air in order to prevent the
condensation of refrigerant in the oil separator shell. The condensed liquid
refrigerant will be sent through oil return line into the compressor crankcase,
creating foam in the oil and causing lubrication problem. Oil separators perform
best when operating at or near the compressor discharge temperature. It is
advisable to insulate the oil separator shell.
Warning: During operation of system, the shells have a high surface
temperature.
Service hints
• Oil separator OSB and OST are equipped with flange and can be opened for
cleaning. Always use a new gasket and tight the bolts with 35 Nm torque.
• The external surface of shells are coated by epoxy powder painting for
optimum protection against corrosion. The external surface of shell shall be
checked as per EN-378 during routine/periodic inspection/service.
OST-4.. OSB/OSH-6..
Ps: 31 bar Ps: 31 bar
1.8 ... 3.8 6.5 ... 7.9
-10 ... +150°C -10 ... +150°C
II II
1/2" ... 1-5/8" 1-3/8" ... 2-1/8"
0.5 0.6
Mxxxx Mxxxx
I II
√ √
UL UL
Date: 25.05.2004
GB
DWG Nr.: / PCN 862 928