Bitzer CSVH2 Mode D'emploi page 20

N N O O T T I I C C E E
!
!
Risk of damage to the compressor!
The new oil has a great cleaning effect in the re-
frigerant circuit.
On the suction side, mount a cleaning filter suit-
able for bidirectional operation!
Mesh size: 25 µm
• Mount a filter for bidirectional operation with perfor-
ated metal tubes around the inside and outside dia-
meter of the filter element.
• After several operating hours: Change the oil filters
and cleaning filters.
• If needed, repeat the operation, see chapter Oil
change, page 22.
6 6 . . 6 6 C C o o m m p p r r e e s s s s o o r r s s t t a a r r t t
For a detailed description, see ST-160, chapter Quick
commissioning.
R R o o t t a a t t i i o o n n d d i i r r e e c c t t i i o o n n t t e e s s t t
The CSV. screw compressors start automatically in the
prescribed rotation direction. The common rotation dir-
ection test for screw compressors is not necessary.
1 1 0 0 s s t t i i m m e e d d e e l l a a y y
When switching the compressor on, the solenoid valve
for the FI cooling opens first. The compressor starts
with a time delay of 10 seconds.
6 6 . . 6 6 . . 1 1 L L u u b b r r i i c c a a t t i i o o n n / / o o i i l l l l e e v v e e l l m m o o n n i i t t o o r r i i n n g g
• Check the lubrication of the compressor directly after
the compressor start.
The oil level must be visible in the zone of both sight
glasses.
• Check the oil level repeatedly within the first hours of
operation!
During the start phase, oil foam may form but its level
should decrease at stable operating conditions. Other-
wise high proportions of liquid in the suction gas are
suspected.
N N O O T T I I C C E E
!
!
Risk of wet operation!
Maintain the discharge gas temperature well
above the condensing temperature: at least
20 K.
20 20
N N O O T T I I C C E E
!
!
Risk of compressor failure due to liquid slug-
ging!
Before adding larger quantities of oil: check the
oil return!
6 6 . . 6 6 . . 2 2 S S e e t t h h i i g g h h p p r r e e s s s s u u r r e e a a n n d d l l o o w w p p r r e e s s s s u u r r e e l l i i m m i i t t e e r r s s ( ( H H P P
+ + L L P P ) )
Check exactly the cut-in and cut-out pressure values
according to the operating limits by testing them.
6 6 . . 6 6 . . 3 3 S S e e t t t t i i n n g g t t h h e e c c o o n n d d e e n n s s e e r r p p r r e e s s s s u u r r e e
• Set the condenser pressure so that the minimum
pressure difference is reached within 20 s after the
compressor start.
• Avoid quick pressure reduction via finely graduated
pressure control.
For application limits, see brochure SP-160 and
BITZER SOFTWARE from version 6.8.
6 6 . . 6 6 . . 4 4 C C h h e e c c k k i i n n g g t t h h e e o o p p e e r r a a t t i i n n g g d d a a t t a a
• Evaporation temperature
• Suction gas temperature
• Condensing temperature
• Discharge gas temperature
– min. 20 K above condensing temperature
– max. 120°C on the outside of the discharge gas
line
• Oil temperature directly under the oil sight glass
• Cycling rate
• Current values
• Voltage
• Prepare data protocol.
For automatic data log and readout of these data, see
ST-160.
For application limits, see brochure SP-160 and
BITZER SOFTWARE from version 6.8.
6 6 . . 6 6 . . 5 5 C C y y c c l l i i n n g g r r a a t t e e b b e e t t w w e e e e n n t t w w o o c c o o m m p p r r e e s s s s o o r r s s t t a a r r t t s s
The FI control forces a time lag of at least 5 minutes
between two compressor starts. Also respect this time
lag during test runs and maintenance work!
SB-160-3 RUS SB-160-3