46
/04.2016/
G35
Komponenten
Kältekreislaufvolumen (dm³)
CR... 211 AS
CR... 251 AS
CR... 361 AS
Verdampfer
4,6
5,9
9,3
Sammler
1,5
4,6
4,6
Innenleitungen - Flüssigkeitsseite*
0,16
0,83
0,86
Innenleitungen - Gasseite**
0,35
0,47
0,99
EN
Process
Values
Operation
1. Preparation
———
Open the valves (
1
) to (
5
).
Close the valve (
9
).
2. Evacuation
70 mbar
Operate the vacuum pump until the value of 70 mbar is displayed on the
pressure gauge. Stop the vacuum pump after evacuation.
3. Breaking vacuum
0,98 bar
Close the valves (
3
), (
4
) and (
5
). Open the valve (
9
) and fill refrigerant
whilst the high pressure gauge (
6
) and the low pressure gauge (
7
) are
observed. When the value of 0,98 bar is reached, close valve (
9
).
4. Waiting time
5 minutes
———
5. Disposal
———
Disposal of refrigerant in accordance with the valid country-specific
regulations. (e.g. using disposal station for FC)
6. Repeat 2. - 5.
1 x
as the above items
7. Last evacuation
1-2 mbar
as item 2
8. Completion
———
Close the suction side valves (
3
), (
4
) and (
5
). Stop the vacuum pump.
9. Filling refrigerant
As required by
system
Open the valve (
9
). Pre-fill the liquid receiver with refrigerant.
The correct amount to be filled must be determined during the operation
of the compressor.
Close all valves after completing the filling process.
For reference see the illustration on the previous page.
How to determine correct refrigerant charge
• Start up the unit according to the instructions in the chapter: Start-up. Manually force the unit to start cooling.
• Set the supply air set point and the differential set point at the lowest admitted level, so that the unit works at
maximum cooling capacity.
• Check that the condensation temperature is approximately 45°C. If it is lower then reduce the efficiency of the
condensing coil by partially shutting it down or by reducing the speed of the condenser fan.
• Measure the subcooling. Fill the system with refrigerant until a subcooling from 5 to 8 °C is reached.
In general, electronic expansion valve doesn’t require adjustments on site. This operation can be
done only by specialized refrigeration technicians only after informing the STULZ engineering
division department
To estimate refrigerant charge in advance, please consider following volumes:
Oil charge
The A/C unit is prefilled with 0.6 l oil. Further addition of oil damages the compressor and may
invalidate guarantee coverage for the product.
Components
Refrigerant circuit volume (dm³)
Evaporator
Liquid receiver
Internal pipes - Liquid side*
Internal pipes - Gas side**
* Including solenoid valve, sight glass, filter dryer
** Intake and discharge pipes of compressor
Summary of Contents for CRL 210 CW
Page 68: ......
