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Witt BDP2, Инструкция по эксплуатации

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Revision:  09/2014  

W 3552-6.02e.E 

Page 13 / 16              MWi 

 
 

Instruction manual 

BDP2 

Tube 

O-ring 

Plastic rod 

12.4 

DISCHARGING AND DISASSEMBLY OF THE BDP2 

1.  Close the stop valve in front of the BDP2 (see system schematic 6.10) such that oil/ mixture cannot 

longer enter 

2.  Wait until 1 to 2 cycles of the BDP2 are completed, to make sure the housing is completely empty. 
3.  Warming up the housing of the BDP2 will evaporate any remaining liquid refrigerant. 
4.  Close the valve behind the BDP2 
5.  Carefully release the pressure of the BDP2 

It is fairly easy to release the pressure inside the BDP2 by using a service valve right in front of the hot 
gas connection. Refrigerant gas can be drained into a bucket of water. This service valve is also suitable 
to evacuate the BDP2 upon re-assembly. 

 

The BDP2 must be without any pressure before disassembly! 

 

6.  Taking out the BDP2 (see also 8. assembly) 

a.  Loose the connections of all pipes 
b.  Loose of the G1“ threaded ring 
c.  Unscrew the BDP2 from the G1“ coupling 

 
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 
the BDP2, it is important to first remove the circlip at the bottom (see 
picture). 
 
Thereafter, the valve head of the BPD2 should be placed on an appro-
priately sized tube (or similar). To avoid any damages the internal valve 
mechanic should fall on a soft mat or cloth. 
 
Then, the valve mechanism can be pushed out of the valve head by 
gently knocking on a plastic rod (or piece of wood) with a hammer (see 
picture). ATTENTION: Do not use metallic rods to avoid damages! 
 
When reassembling the valve mechanism, it is strongly recommended 
to replace the two O-rings. 
 
When internals have been cleaned, the BDP2 (valve head & container) 
can be reassembled. 
 
It  is  important  the  cylinder  screws  are  re-tightened 
with a 

torque of 56 Nm

. 

The  tight  installation  should  be  checked  upon  
successful re-assembly into the system (see also 9.). 
 
 
 
 
 
 
 

Circlip 

 

Soft pad 

Содержание BDP2

Страница 1: ...ring pro tection clothing and safety glasses 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...

Страница 2: ... DWR WITT oil fine filter ÖF G1 4 Level switch or Level switch with heating element t0 30 C no ATEX approval 5 TECHNICAL DATA 5 1 PRESSURE TEMPERATURE RANGE max permissible pressure Ps at t0 100 max permissible pressure Ps at t0 75 Test pressure PT BDP2 25 bar 1 00 bar to 25 00 bar between 10 C and 75 C 1 00 bar to 18 75 bar between 10 C and 60 C 41 00 bar BDP2 40 bar 1 00 bar to 40 00 bar between...

Страница 3: ...003002 25 bar KW Art Nr 3552 002101 25 bar KW Art Nr 3552 002102 BDP2 38 BDP2 03 to BDP2 38 25 bar Part no 3552 002003 25 bar 40 bar Part no 3552 003003 40 bar 25 bar KW Art Nr 3552 002103 Hot gas connection Oil discharge Hot gas connection Hot gas connection Oil discharge Oil discharge Required diameter for installation D 206 Optional level switch Optional Level switch Optional level switch Oil i...

Страница 4: ...0 SS G1 II for installation to a Including threaded Including threaded different brand valve connection G1 connectionG1 25 bar Part no 6435 AF0F01 Part no 4111 AA8MJA Part no 4111 AA8MKA 40 bar Part no 6435 AF0F01 Part no 4111 AA8MJD Part no 4111 AA8MKD Adapter with gas equalization line Level switch incl adapter O Ring Part no 3552 000009 25 bar 40 bar Part no 3552 005010 25 bar 40 bar Level swit...

Страница 5: ...ative Check valve 1 bar Part no 3552 000043 O ring Neopren 19 x 4 70SH KW O Ring LT170 19x4 70 SH Art Nr 5632 1A9AHK Gasket 10 18x2 Centellen Art Nr 6434 ACOD00 Gasket 80 100x2 Centellen Art Nr 3552 000006 O ring Neopren 75 87x2 62 70SH O ring Neopren 28x5 70SH KW O ring LT170 28x5 70 SH Optional level switch Heating element for level switch Part no 4651 140601 Check valve 3 bar Part no 3552 00004...

Страница 6: ...ter evaporation of the remaining liquid refrigerant should be equivalent to the amount that is carried over from the compressor passing the oil separator In common systems operated with synthetic refrigerants the amount of oil dissolved in the refrig erant is approximately 3 miscibility gap should be considered 6 2 REFRIGERANT OIL MIXTURE SUPPLY Oil respective refrigerant oil mixture must enter th...

Страница 7: ...en evaporated before returned to the compressor The heating capacity should be adequately selected such that any liquid refrigerant is completely evaporated Sufficient time for evaporating should also be con sidered when an optional level senor is used to control the cycle WITT flow through evaporator DWR or small oil collectors heated electrically or with hot gas are proven for this purpose see s...

Страница 8: ... In systems with synthetic refrigerants the control cycle has to be adjusted depending on the operation time and may need up to 10 cycles per hour depending on the oil carry over of the compressor When operating an ammonia system a small BDP2 is normally suitable with 1 to 6 cycles per day If the refrigeration heat pump system is operated with only one compressor or multiple compressors with one o...

Страница 9: ...l control Tapping Point A Hot gas supply through regulating valve EE3 or EE6 and Hot gas solenoid valve DN3 at oil separator 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 DWR heat exchanger WITT DWR if required with oil filter X return position piston compressor Y return position screw compressor ...

Страница 10: ...ake sure the cylinder screws are tightened again with a torque of 56 Nm Before installation the G1 threaded ring of the BDP2 should be turned all the way down The threaded ring together with the O ring acts as a stuffing box screw connection When the BDP2 is entirely screwed into the existing G1 connection the BDP2 should be positioned and sealed with the threaded ring O ring Therefore the threade...

Страница 11: ... sure any dirt is flushed out off the system It is recommended to wait until the oil of the compressor has been changed for the first time to make sure most of the dirt is removed Check that the max allowable pressure is not exceeded see data plate the pressure in the BDP2 housing cannot increase more than 3 bar above the lowest possible pressure in the compressor suction line particularly during ...

Страница 12: ...ring re assembly all gaskets should be replaced Besides the following recommended test there is no further work required 12 1 FUNCTION CONTROL During operation the proper functioning of the internal piston mechanical valve can be recognized when the piston moves down Due to the internal damping it is not easy to recognize when the piston is moving up A side glass behind the BDP2 is recommended to ...

Страница 13: ...DP2 from the G1 coupling 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 the BDP2 it is important to first remove the circlip at the bott...

Страница 14: ...cessful inspection and cleaning the check valve can be re assembled Check the system for tightness see 12 5 1 13 OPTIONAL LEVEL SWITCH no ATEX approval 13 1 SCOPE OF SUPPLY DIMENSIONS There are two options available standard level switch for BDP2 and for operating temperatures below 30 C level switch for BDP2 with heating element The scope of supply includes level switch including connector plug H...

Страница 15: ...self sealing 3 Screw the level switch into the adapter 4 Fit the o ring on to the adapter 5 Insert the level switch with adapter and o ring in the intended tap hole of the BDP2 6 Start up the BDP2 13 5 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 determine...

Страница 16: ... Orifice hole in the internal piston is blocked Clean the orifice see 12 2 and 12 4 14 2 CYCLE DOES NOT WORK Not sufficient hot gas pressure Open the regulating valve of the hot gas line e g the top service valve on the high side float regulator Solenoid valve in the hot gas line does not open Check solenoid valve and its control Liquid in the hot gas line See chapter 6 4 BDP2 connections mistaken...

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