Refrigerant Charging Procedure - Ludicrous

Refrigerant Charging Procedure - Ludicrous
REFRIGERANT CHARGING PROCEDURE
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
4. Refrigerant Charging Procedure
2) Install the low-/high-pressure hoses to corresponding service ports on vehicle.
A: OPERATION
CAUTION:
• During operation, be sure to wear safety goggles and protective gloves.
• If air is mixed in refrigeration cycle, poor
cooling may result, and also if moisture is
mixed in refrigeration cycle, clogging (freezing)
or rust may result.
Before charging the refrigerant, evacuate the
system using vacuum pump to remove air and
moisture in the system. Moisture can be evaporated and removed easily even at normal temperature, if the system is evacuated using
vacuum pump.
1) Close all valves of manifold gauge.
(1)
(2)
(3)
L
H
AC-00147
(1) Low service port
(2) High service port
(3) Close
(3)
(1)
(4)
(2)
CAUTION:
Be sure that the hoses are securely connected.
3) Connect the center hose of manifold gauge with
vacuum pump.
4) Activate the vacuum pump and then open the
valves on low-/high-pressure sides.
(6)
(5)
(3)
(1)
L:
H:
(1)
(2)
(3)
(4)
(5)
(6)
(2)
Low-pressure gauge
High-pressure gauge
Low-pressure valve
Vacuum pump valve
High-pressure valve
For low-pressure
For vacuum pump
For high-pressure
(2)
AC-00146
(1)
AC-00148
(1) Vacuum pump
(2) Open
CAUTION:
Be sure to evacuate the system using vacuum
pump.
5) After at least 5 minutes of evacuation, if the lowpressure gauge reading shows 100.0 kPa (750
mmHg, 29.5 inHg) or higher, close the valves on
center hose to stop the vacuum pump.
AC-21
REFRIGERANT CHARGING PROCEDURE
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
6) Leave it at least 5 to 10 minutes after closing the
valves on low-/high-pressure sides, and then check
the low-pressure gauge reading for any changes.
When the gauge reading changes, this is a sign of
leakage. Check the pipe or hose connector points,
and repair if necessary. Repeat the procedure from
1) after repairing the faulty part.
7) If there are no leaks, further evacuate the system 20 to 30 minutes.
8) Close all valves and stop the vacuum pump.
9) Following the can tap operation manual instructions, install it to refrigerant can.
13) Loosen the center hose connection on manifold
gauge (if applicable, press a purge valve on manifold gauge) only for a couple of seconds to allow
the air in the center hose to escape by the refrigerant.
(1)
(2)
AC-00216
14) Make sure that the high-pressure valve of manifold gauge is closed, and then open the low-pressure side valve only to charge the refrigerant.
(1)
AC-00214
(1) Tap valve
(2) Connect to center hose
(2)
10) Disconnect the vacuum pump from center
hose, and connect the hose to tap valve.
11) When a refrigerant recovery container is used,
measure the refrigerant amount in use using a
weighting scale before connecting to center hose.
(1)
(2)
AC-00215
(1) Refrigerant recovery container
(2) Weighting scale
12) Open the valve on HFC-134a source.
AC-00217
(1) Open
(2) Close
CAUTION:
Do not open the high-pressure valve. Be sure to
open the low-pressure valve.
15) Close the low-pressure valve when the lowpressure gauge reading reaches 200 kPa (1,500
mmHg, 59.1 inHg).
16) Using a leak tester, check the system for refrigerant leaks.
17) After confirming that there are no leaks with the
leak test, charge the required amount of refrigerant.
18) If the HFC-134a source is empty, close the lowpressure valve and then close the valve on can tap
before replacing the empty source. Restart charging operation after replacing the HFC-134a source
with a new one and purging.
19) Close the low-pressure valve if the charge rate
of refrigerant becomes worse.
20) Confirm that both the low-/high-pressure
valves are closed. Start the engine with A/C switch
OFF.
21) Quickly repeat A/C switch ON-OFF cycles a
few times to prevent initial compressor damage.
AC-22
REFRIGERANT CHARGING PROCEDURE
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
22) Set up the vehicle to the following status:
• A/C switch ON
• Engine running at 1,500 rpm
• Blower speed setting to “Hi”
• Temperature setting to “MAX COOL”
• Air inlet setting to “RECIRC”
• Window open
23) Open the low-pressure valve and charge the
specified amount of refrigerant.
24) Close all valves and disconnect the hoses from
service port after charging the refrigerant.
25) Install the cap to service port.
AC-23
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