Rover DEFENDER 300Tdi, Руководство по ремонту, Страница: 375 / 450

AIR CONDITIONING
5 ADJUSTMENT
AIR CONDITIONING SYSTEM - PERFORMANCE
TEST
WARNING: R134a is hazardous See
Repair, General Precautions
Carry out this test with bonnet and doors or windows
open, air conditioning switched on, temperature
control set to cold and blower at maximum speed. Set
the air supply control to supply fresh air.
1. Close low pressure valve on refrigerant station.
2. Close high pressure valve on refrigerant station.
3. Connect a Refrigerant Station to the high and
low pressure servicing connections.
4. Insert dry bulb thermometer into cold air outlet
and position dry and wet bulb thermometer close
to outside air inlet.
Do not spill water from the wet thermometer
(psychrometer).
5. Start engine and run it at 1500 rev/min for 10
minutes with air conditioning switched on.
6. Read both pressure gauges and thermometers.
Check readings against table below with
humidity between 60% and 80%.
7. Switch off air conditioning, stop engine,
disconnect test equipment.
Performance range
Intake temperature Outlet temperature Low pressure High pressure
20 - 24
°
C 4 - 10
°
C 18 - 28 lbf/in
2
213 - 299 lbf/in
2
1.2 - 1.9 bar 14.7 - 20.6 bar
25 - 29
°
C 9 - 19
°
C 27 - 37 lbf/in
2
256 - 341 lbf/in
2
1.9 - 2.6 bar 17.6 - 23.5 bar
30 - 35
°
C 20 - 27
°
C 33 - 47 lbf/in
2
299 - 384 lbf/in
2
2.3 - 3.2 bar 20.6 - 26.5 bar
Table 1
Ambient Compound Gauge High Pressure
Temperature Readings Gauge Readings
°
C
°
F bar lbf/in
2
bar lbf/in
2
16 60 1,03-1,4 15-20 6,9-10,3 100-150
26,7 80 1,4-1,72 20-25 9,6-13,1 140-190
38 100 1,72-2,1 25-30 12,4-15,5 180-225
43,5 110 2,1-2,4 30-35 14,8-17,2 215-250