Bitzer HS.8551 Mode D'emploi page 8

4 4 . . 3 3 . . 1 1 P P i i p p e e c c o o n n n n e e c c t t i i o o n n s s
The pipe connections are suitable for pipes in all com-
mon dimensions in millimetres and inches. Brazed con-
nections have stepped diameters. The pipe will im-
merge more or less depending on its dimensions. If ne-
cessary, the bushing may even be cut at the end with
the largest diameter.
4 4 . . 3 3 . . 2 2 S S h h u u t t - - o o f f f f v v a a l l v v e e s s
C C A A U U T T I I O O N N
Depending on the operation mode, the shut-off
valves may become very cold or very hot.
Risk of burning or frostbite!
Wear suitable protective equipment!
N N O O T T I I C C E E
!
!
Do not overheat the shut-off valves!
Cool the valve body and the brazing adapter
during and after the brazing operation.
Maximum brazing temperature 700°C!
For welding, dismount the pipe connections and
the bushes.
When turning or mounting shut-off valves:
N N O O T T I I C C E E
!
!
Risk of damage to the compressor.
Tighten screws crosswise in at least 2 steps to
the prescribed tightening torque.
Test tightness before commissioning!
When retrofitting the ECO shut-off valve:
I I n n f f o o r r m m a a t t i i o o n n
To increase the corrosion protection, it is recom-
mended to coat the surface of the ECO shut-off
valve.
4 4 . . 3 3 . . 3 3 P P i i p p e e l l i i n n e e s s
Use only pipes and system components that are
• clean and dry inside (free from slag, swarf, rust and
phosphate coatings) and
• delivered with an air-tight seal.
Depending on the compressor versions, they are sup-
plied with blanking plates on the pipe connections or
shut-off valves. These must be removed before per-
forming the pressure strength and tightness tests and
commissioning the system.
8 8
I I n n f f o o r r m m a a t t i i o o n n
The blanking plates are only designed to serve
as a transport protection. They are not suitable
as a separation between different system sec-
tions during the strength pressure test.
N N O O T T I I C C E E
!
!
For systems with rather long pipelines or for
brazing operations without protective gas:
Install the suction-side cleaning filter (mesh size
< 25 μm).
N N O O T T I I C C E E
!
!
Risk of compressor damage!
Generously sized filter dryers should be used to
ensure a high degree of dehydration and to
maintain the chemical stability of the circuit.
Make sure to choose a suitable quality (molecu-
lar sieves with specially adapted pore sizes).
I I n n f f o o r r m m a a t t i i o o n n
Notice for mounting the suction-side cleaning fil-
ter, see Manual SH-110.
Mount pipes in a way to protect the compressor from
flooding with oil or liquid refrigerant during standstill.
Follow the notes given in SH-110.
H H S S . . 8 8 5 5 : : L L i i q q u u i i d d i i n n j j e e c c t t i i o o n n a a n n d d / / o o r r e e c c o o n n o o m m i i s s e e r r
The optional pipes for liquid injection (LI) and / or eco-
nomiser (ECO) must first be routed upward from the
connection (see following figure). This avoids oil migra-
tion and damage to the components through hydraulic
pressure peaks (see Manual SH-110). The kit for eco-
nomiser operation already includes the required pipe
joint with swan neck. See also Technical Information
ST-610 and the information given in Manual SH-170.
SB-110-3 RUS SB-110-3