ECU NISSAN 300ZX 1984 Z31 Heather And Air Conditioner Workshop Manual

DISCHARGING, EVACUATING, CHARGING AND CHECKING
0 (0)
300 /1,000)
Evacuating The System
1. Start pump, then open both valves and run
pump for about 20 minutes
-. -
101 3 (760.29 92)
98
0 (735.28 94)
To high-pressure serwce valve To low-pressure
600 (2,000)
Vacuum pump
94 6 (710.27 95)
SHA241 B
900 (3.000)
2. When low gauge has reached approx 101 3 kPa
(760 mmHg, 2992 inHg), completely close
both valves of gauge and stop vacuum pump
Let
it stand for 5 to 10 minutes in this state
and confirm that the reading does not rise.
a. The low-pressure gauge reads lower by 3.3 kPa
(25 mrnHg, 0.98 inHg) per 300 rn (1.000 ft)
elevation Perform evacuation according to the
following table.
91 3 (685.26 97)
I
Vacuum of system*
kPa
(mmHs. inHal
Elevation
m (ftl
* Values show reading of the low-pressure gauge
b. The rate of ascension of the low-pressure gauge
should be less than
3.3 kPa (25 mmHg, 0.98
inHg) in five minutes.
- Charging
1 Evacuate refrigerant system
2
Close manifold gauge valves securely and dis-
connect charging hose from vacuum pump
3 Purge air from center charging hose
1) Connect center charging hose to refrigerant can
through can top
2) Break
seal of refrigerant can and purge air
SHA2428
4 Charge refrigerant into system
WARNING:
Ensure that engine is off.
1) Open high- and low-pressure valves of manifold
gauge and charge refrigerant into system
SHA243B
HA-I 3

COMPRESSOR OIL--For MJS170
Checking and Adjusting
The oil used to lubricate the compressor is circulat-
ing with the refrigerant
Whenever replacing any component of the system
of
a large amount of gas leakage occurs, add oil to
maintain the original amount
of oil
Total amount of oil in the system:
150 mP (5.1 US fl 02, 5.3 Imp fl 02)
KV994A9690
KV992C50822 /
i;(V994A9690 SHAO17A
1
2
3
Connect oil separator KV994A9690 between
compressor discharge
side and condenser
Evacuate and charge the system
Operate compressor
at engine idling with air
conditioner
set for maximum cooling and high
fan speed
4 Stop compressor operation after 10 minutes
Never allow engine speed to exceed idling speed
CAUTION.
Do not continue compressor operation for more
than 10 minutes
5 Disconnect oil separator and connect refriger-
ant line
to original positions
6 Disconnect low flexible hose from compressor
suction
valve
7 Add new oil from compressor suction port
Amount of oil to be added:
120 mP (4.1 US fl oz,4.2 Imp fl 02)
Low pressure ride
SHA702
0 Oil remains unremoved in the system about 30
mP (1.0 US fl 02, 1 1 Imp fl 02).
8 After adding oil, rotate compressor clutch by
hand 5 to 10 turns
9 Connect refrigerant line and evacuate and
charge system
10 Conduct leak
test and performance test
11 Gradually loosen drain cap of oil separator to
release residual pressure Remove cap and drain
Oil
12 To prevent formation of rust and intrusion of
moisture or dust, perform the following before
placing oil separator kit into storage
1) Cap each opening of flexible hose and double
union securely
2) Cap oil separator, evacuate it from service
valve, and charge refrigerant
HA-23