Revision: 09/2014
W 3552-6.02e.E
Page 12 / 16 MWi
Instruction manual
BDP2
12.
MAINTENANCE AND INSPECTION
The BDP2 should be visually inspected according to EN 378-2 on a regular basis.
Any work with refrigeration systems must be carried out by trained and knowledgeable personnel. All safety
regulations and codes of practice concerning the use of refrigerants must be adhered to.
Prior to any maintenance work and loosening of any screws, make sure the housing has been vented correct-
ly and all refrigerant is removed correctly.
When opening the BDP2 a sudden evaporation of trapped refrigerant may occur. Therefore, special attention
must be paid to wearing of protection clothing and safety glasses. Never remove any screws when there is a
possibility of refrigerant or pressure remaining in the system.
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.
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 be able to visually check whether the refrigerant/oil mixture
is pushed out.
12.2
CHECK OF THE INTERNAL ORIFICE
To enable the immediate opening upon finishing the cycle, the internal piston is equipped with a small orifice (hole). It
may be necessary to clean this hole when it has got contaminated.
The blocked hole of the piston can be recognized when the BDP2 remains warm at all times. (Normal operat-
ing conditions will result in alternation of frost and condensate). If the hole is blocked the internal piston will
prevent proper supply to the BDP2.
12.3
EXCHANGE OF THE CHECK VALVE
In the discharge connection is a small check valve that can be removed, when a 1 bar pressure difference instead of
3 bar is required (see chapter 6.3). It is possible to exchange the check valve.
Orifice
