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Please read this manual carefully before installing, commissioning or operating the BDP2
ATEX
The BDP2 without optional level sensor has no ignition sources and therefore it does not meet the definition of
devices according to the ATEX Directive 94/9 / EC. The basis for this is an risk assessment of ignition sources ac-
cording EN 13463-1, chapter 5.2. Even during possible occurring malfunctions there are no own potential ignition
sources present.
3.
TERMS OF WARRANTY
To prevent accidents and for the safe operation of the refrigerant plant no modifications or alterations may be carried
out to the BDP2 without written approval by TH. WITT Kältemaschinenfabrik GmbH.
All information for the safe operation and maintenance of the BDP2 is based on our experience and is to the best of
our knowledge.
Our liability or warranty is excluded, if:
The instructions in this manual are not adhered to
The BDP2 and its equipment were operated incorrectly or the handling was not in accordance with the
mentioned procedures
The BDP2 is used for purposes other than that for which it was intended to
Safety devices were not used or disconnected
There have been modifications made without written approval
The safety requirements were not adhered to during installation or operation
Instruction manual
BDP2
1.
INTENDED USE
The automatic oil return system BDP2 is solely intended to return refrigerant oil in a
refrigeration or heat pump system.
2.
SAFETY REQUIREMENTS
Any work with refrigeration systems must be carried out by trained and knowledge-
able personnel. All safety regulations / EC-Material Safety Data Sheets and codes
of practice concerning the use of refrigerants must be adhered to.
Under no circumstances are the indicated temperature- and pressure-limitations on
the data plate to be exceeded!
Applicable standards and regulations for installing or operating refrigeration plants,
e.g., EN 378 must be adhered to.
Before
work
is important pressure has been entirely released from the BDP2
housing.
When opening the BDP2 a sudden evaporating of trapped refrigerant
may occur. Therefore, special attention must be paid to wearing pro-
tection clothing and safety glasses.
is
carried
out
and
Revision: 09/2014
W 3552-6.02e.E
Page 1 / 16
screws
are
loosened, it
MWi

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Summary of Contents for Witt BDP2

  • Page 1 To prevent accidents and for the safe operation of the refrigerant plant no modifications or alterations may be carried out to the BDP2 without written approval by TH. WITT Kältemaschinenfabrik GmbH. All information for the safe operation and maintenance of the BDP2 is based on our experience and is to the best of our knowledge.
  • Page 2: Scope Of Delivery / Available Sizes

    65,60 bar WORKING FLUIDS/REFRIGERANTS The BDP2 can be operated with all common refrigerants such as CO2, NH3, R134a, R404, R407c, R507, etc., and with common refrigerant oils such as Fuchs Reniso KC68 or S68, Shell G68 Clavus, Reflo 68 Petro Canada, Arctic SHC 226 Exxon.
  • Page 3: Dimensions And Connections Bdp2

    Revision: 09/2014 Instruction manual W 3552-6.02e.E BDP2 Page 3 / 16 DIMENSIONS AND CONNECTIONS BDP2 inlet inlet Hot gas connection discharge Hot gas connection Optional discharge Level switch Optional level switch BDP2-03 BDP2-14 25 bar Part no. 3552.002001 25 bar Part no.
  • Page 4: Optional Equipment

    Revision: 09/2014 Instruction manual W 3552-6.02e.E BDP2 Page 4 / 16 OPTIONAL EQUIPMENT Threaded connection G1“ EA32/G1“-I EA32/G1“-II (for installation to a (Including threaded (Including threaded different brand valve) connection G1”) connection G1”) 25 bar Part no. 6435.AJ0F00 Part no. 4111.AA7DJA Part no.
  • Page 5: Spare Parts

    Revision: 09/2014 Instruction manual W 3552-6.02e.E BDP2 Page 5 / 16 SPARE PARTS Set of gaskets inlet Part no.: 3552.006001 Mechanical valve Set of gaskets KW Part no.: 3552.002006 Part no.: 3552.006002 O-ring – Neopren 28x5 – 70SH KW: O-ring – LT170 28x5 –...
  • Page 6: Non-Soluble Oils / Ammonia Systems

    6.1.2 SOLUBLE OILS / SYSTEMS USING SYNTHETIC REFRIGERANTS It is also possible to return oil that is carried over from the compressor with the BDP2 when using soluble refrigerant oils. In systems, using synthetic refrigerants the supply line to the BDP2 should be connected to an oil-rich phase –...
  • Page 7: Hot Gas Line

    (see “system schematic”, 6.10, tapping point B). In both cases, the control line that is fed from a solenoid valve should be installed near to the BDP2, because larger quantities of condensate may collect in front of the solenoid valve, but only refrigerant vapor is allowed for the cycle.
  • Page 8: Repeating The Cycle

    BDP2. The control system needs to consider the time needed to fill again the BDP2. Therefore the safety low level is not suitable for the demand control. It may be necessary to add a further level switch in the oil separator.
  • Page 9: System Schematic

    Tapping Point B = Hot gas supply through regulating valve EE3 or EE6 and Hot gas solenoid valve DN3 at WITT high side float regulator HR or HS = heat exchanger WITT DWR, if required with oil filter = return position piston compressor...
  • Page 10: Shipping And Storage

    Allow sufficient space for inspection and servicing. Provide at least 20 cm underneath the BDP2 for easy removal. Furthermore, a diameter of at least 20,6 cm space should be considered in order to be able to rotate the BDP2 in the G1”...
  • Page 11: Prior To Commissioning

    BDP2. The hot gas solenoid valve should be activated over a period of 1 to 10 minutes– depending on the size of the BDP2 and the system concept (time or demand control) – to push the liquid content out of the BDP2. The timer can be...
  • Page 12: Maintenance And Inspection

    The BDP2 is designed to operate without the need of regular maintenance work. In case of contamination, it is possible to disassemble the BDP2 for cleaning or replacement of parts. During re- assembly all gaskets should be replaced.
  • Page 13: Cleaning The Bdp2

    12.5 CLEANING THE BDP2 To clean the BDP2 it is sufficient to take the valve head off by unscrewing the container. Then it is possible to re- move any dirt by blowing out (with air) or rinsing the internals. 12.5.1 DISASSEMBLY OF THE VALVE MECHANISM In case the valve mechanism should be pushed out, e.g., when cleaning...
  • Page 14: Disassembly Of The Check Valve

    DESCRIPTION OF OPERATION The level switch is fitted to the highest possible position within the BDP2 housing. When the oil reaches this level a red LED will illuminate and the solenoid valve in the hot gas line opens. This will start pushing out the oil content.
  • Page 15: Electrical Connection

    START-UP When starting up the BDP2 with level switch, it is necessary to check that the time to push out the content is suffi- cient (see also 6.9). The time required to push out the content is determined by the holding time of the level switch plus the follow-up time.
  • Page 16: Troubleshooting

    BDP2, the refrigerant and the refrigerant oil, the actual viscosity and the temperature. The required time to push out the content can be determined by, e.g., observing the side glass at the BDP2 outlet and adjust the time accordingly.

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