Bitzer CSVH2 Mode D'emploi page 19

D D A A N N G G E E R R
Risk of bursting due to excessive pressure!
The pressure applied during the test must never
exceed the maximum permitted values!
Test pressure: 1.1-fold of the maximum allow-
able pressure (see name plate). Make a distinc-
tion between the high-pressure and low-pres-
sure sides!
6 6 . . 2 2 C C h h e e c c k k i i n n g g t t i i g g h h t t n n e e s s s s
Check the refrigerant circuit (assembly) for tightness,
as a whole or in parts, according to EN378-2 (or other
applicable equivalent safety standards). For this, create
an excess pressure, preferably using dried nitrogen.
Observe test pressures and safety reference, see
chapter Checking the strength pressure, page 18.
6 6 . . 3 3 E E v v a a c c u u a a t t i i o o n n
• Open all shut-off valves and solenoid valves.
• Use a vacuum pump to evacuate the entire system,
including the compressor, on the suction side and
the high pressure side.
With the vacuum pump shut off, a "standing vacuum"
lower than 1.5 mbar must be achieved.
• Repeat the operation several times if necessary.
N N O O T T I I C C E E
!
!
Risk of damage to the motor and compressor!
Do not start the compressor while it is in a va-
cuum!
Do not apply any voltage, not even for testing!
6 6 . . 4 4 C C h h a a r r g g i i n n g g r r e e f f r r i i g g e e r r a a n n t t
Use only permitted refrigerants, see Application ranges.
D D A A N N G G E E R R
Risk of bursting of components and pipelines
due to hydraulic excess pressure while feeding
liquid.
Serious injuries are possible.
Avoid overcharging the system with refrigerant
under all circumstances!
W W A A R R N N I I N N G G
Risk of bursting due to counterfeit refrigerants!
Serious injuries are possible!
Purchase refrigerants only from reputable man-
ufacturers and reliable distributors!
SB-160-3 RUS SB-160-3
N N O O T T I I C C E E
!
!
Risk of wet operation during liquid feeding!
Measure out extremely precise quantities!
Maintain the discharge gas temperature at least
20 K above the condensing temperature.
◦ Before charging with refrigerant:
◦ Switch the main switch (Q1) on. Ensure that the
compressor is not switched on.
◦ The FI is now energized, the oil heater is active.
◦ Check the oil level in the compressor.
• Charge the condenser or receiver directly with liquid
refrigerant; on systems with flooded evaporator,
maybe also the evaporator.
• Blends must be taken out of the charging cylinder as
a solid liquid.
• After commissioning, it may be necessary to add re-
frigerant: While the compressor is running, charge
with refrigerant on the suction side, preferably at the
evaporator inlet. Blends must be taken out of the
charging cylinder as a solid liquid.
6 6 . . 5 5 C C h h e e c c k k i i n n g g b b e e f f o o r r e e 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
• Oil level (between the middle of the lower sight glass
and the upper area of the upper sight glass)
• Setting and functions of safety and protection
devices
• Setpoints of the time relays
• Cut-out pressure values of the high pressure and low
pressure limiters
• Check if the shut-off valves are opened.
I I n n c c a a s s e e o o f f c c o o m m p p r r e e s s s s o o r r r r e e p p l l a a c c e e m m e e n n t t
Oil is already in the circuit. It may therefore be neces-
sary to drain off some oil.
N N O O T T I I C C E E
!
!
In case of larger oil quantities in the refrigerant
circuit: Risk of liquid slugging when the com-
pressor starts!
Maintain the oil level within the marked sight
glass area!
When a reciprocating compressor is replaced:
• Completely remove the oil from the system. The new
oil is not only more viscous. It is an ester oil with dif-
ferent chemical and physical properties.
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