Performance Test
The performance test is used to determine whether the mechanical function of the air conditioning system meets the specifications.
The nominal values for the low pressure and high pressure at a certain ambient temperature and an engine speed of 1500 rpm are given in the tables on page 18.
When performing the performance test the measured values can be compared with the nominal values in this table.
Possible causes of any deviation are given in the tables in paragraph 4.3.
· Connect Service Station to high and low pressure service connections.
1 = High pressure service connection
2 = Low pressure service connection
Important:
| Hoses must not come into contact with the exhaust manifold or rotating parts of the engine. | |||
|---|---|---|---|
| .P. U6707.tif | 9 | 7,5 | tiff;; |
The following conditions must be observed:
· All windows and doors closed
· Bonnet open (for guage measurement)
· Avoid direct sunlight
· Air circulation lever to the left ("inside air")
· Blower switch in position "4", temperature control switch to the left ("COLD").
· Air distribution switch at "face level"
· With engine warm, allow engine to run at idle speed for 15 minutes.
· After 15 minutes get in and set engine speed to 1500 rpm for 5 minutes with the AC switched "ON".
Measure high and low pressures using the Service Station 17734, EUROLINE No. 03 015 003, and compare with performance data.
After performance test, allow vehicle to cool before disconnecting hoses.
| Ambient temperature | High pressure | Low pressure | Engine speed | ||
|---|---|---|---|---|---|
| °C | kPa | bar | kPa | bar | min-1 |
| 25 | 1200 - 1600 | 12 - 16 | 150 - 350 | 1,5 - 3,5 | |
| 30 | 1300 - 1700 | 13 - 17 | 150 - 350 | 1,5 - 3,5 | 1500 |
| 35 | 1550 - 1950 | 15,5 - 19,5 | 200 - 400 | 2 - 4 |