Question on AC condensors, can they be run in series? Options

[boxsterfan]

Suppose a crazy person was thinking of A/C in their 914. Could such a crazy person run condensors in series behind the fog light grills?

Basically, the refrigerant (R134) would come from the compressor all the way up to the right front under the headlight, go through a condensor, come out of that condensor across the front of trunk, into a second condensor under the left head light area, and then back out to a receiver/dryer and through the rest of the system.

Obviously, there are some cuts you need to make in the front area behind the fog light grills, the condensors have to be small enough to fit under the headlights when close and for good enough air flow you have to have cut holes in the front wheel well behind the condensors.

I know someone on this board mounted some oil coolers in these locations (can't find the thread).

914 A/C reference from http://www.914world.com/bbs2/index.php?sho...=192917&hl= (thanks dlee6204).

[jcd914]

The Leaf 's electric AC compressor does NOT operate on 12 volts.
It operates as part of the Leaf's high voltage system which which the warning labels say can be as high as 500 volts but the specs on the Li-ion battery list it at 360 volts.

Jim

[boxsterfan]

The Leaf 's electric AC compressor does NOT operate on 12 volts.
It operates as part of the Leaf's high voltage system which which the warning labels say can be as high as 500 volts but the specs on the Li-ion battery list it at 360 volts.

Jim

Everything I read on it says it is 12V. Certainly there would be some step-down from the primary battery (operating at super high voltages) to the individual components in the system. Otherwise, you would need a stereo that can take in high voltage, electric window motors that take in high voltage, windshield wipers, etc, etc....

http://fengauto.en.alibaba.com/product/600...AES28AV3AA.html

[jcd914]

The Leaf 's electric AC compressor does NOT operate on 12 volts.
It operates as part of the Leaf's high voltage system which which the warning labels say can be as high as 500 volts but the specs on the Li-ion battery list it at 360 volts.

Jim

Everything I read on it says it is 12V. Certainly there would be some step-down from the primary battery (operating at super high voltages) to the individual components in the system. Otherwise, you would need a stereo that can take in high voltage, electric window motors that take in high voltage, windshield wipers, etc, etc....

http://fengauto.en.alibaba.com/product/600...AES28AV3AA.html

The Leaf has a complete separate 12 volt system to support the standard automotive bits and pieces such as stereos and window motors.

In the Nissan procedure to remove and reinstall the compressor there are 16 references to "High Voltage" or "High Voltage connector" including a set of images showing the High Voltage connector and how to unlock and lock it. There is also a low voltage connector on the compressor.


Here is the text of the procedure, I did not take the time to download all the iamges so the text reads a little odd where there were images but you can read the references to disconnecting and connecting the high voltage connector.

From Nissan's R&I Procedure:


2014 Nissan-Datsun Leaf ELE-Electric Engine
Vehicle » Heating and Air Conditioning » Compressor HVAC » Service and Repair » Electric Compressor » Removal And Installation

ELECTRIC COMPRESSOR

Removal and Installation

DANGER:
Since hybrid vehicles and electric vehicles contain a high voltage battery, there is the risk of electric shock, electric leakage, or similar accidents if the high voltage component and vehicle are handled incorrectly. Be sure to follow the correct work procedures when performing inspection and maintenance.

WARNING:
- Be sure to remove the service plug in order to disconnect the high voltage circuits before performing inspection or maintenance of high voltage system harnesses and parts.
- The removed service plug must always be carried in a pocket of the responsible worker or placed in the tool box during the procedure to prevent the plug from being connected by mistake.
- Be sure to wear insulating protective equipment consisting of glove, shoes, face shield and glasses before beginning work on the high voltage system.
- Never allow workers other than the responsible person to touch the vehicle containing high voltage parts. To keep others from touching the high voltage parts, these parts must be covered with an insulating sheet except when using them. Refer to "High Voltage Precautions" See: Service Precautions\High Voltage Precautions.

CAUTION:
Never bring the vehicle into the READY status with the service plug removed unless otherwise instructed in the Service Manual. A malfunction may occur if this is not observed.

REMOVAL

WARNING:
Disconnect high voltage circuit. Refer to "How to Disconnect High Voltage" See: Body and Frame\High Voltage System Disable / Enable\Service and Repair.
1.Check voltage in high voltage circuit. (Check that condenser are discharged.)
a.Lift up the vehicle, and then remove Li-ion battery under covers. Refer to "Exploded View" See: Electric Drive Systems\Battery / Power Control System\Battery\Service and Repair\Li-Ion Battery\Exploded View.
b.Disconnect high voltage connector from front side of Li-ion battery. Refer to "Removal and Installation" See: Electric Drive Systems\Battery / Power Control System\Battery\Service and Repair\Li-Ion Battery\Removal And Installation.
c.Measure voltage between high voltage harness terminals.

Standard: 5 V or less

CAUTION:
For voltage measurements, use a tester which can measure to 500 V or higher.
2.Use the refrigerant recovery equipment (for HFC134a) and recover the refrigerant. See: Refrigerant\Service and Repair\Recycle Refrigerant\With Heat Pump System, "Recycle
Refrigerant".
3.Remove radiator upper grille. Refer to "RADIATOR UPPER GRILLE : Removal and Installation" See: Body and Frame\Radiator Support\Service and Repair\Radiator Upper Grille.
4.Remove bolt (A) and disconnect low-pressure flexible hose from electric compressor.

CAUTION:
- Cover the low pressure port of the electric compressor with a cap to prevent oil from spilling.
- To prevent the inclusion of foreign matter, use a cap or vinyl tape to seal off the pipe connection port from the atmosphere.
5.Remove bolts (A) and disconnect high-pressure flexible hose from electric compressor.

CAUTION:
- Cover the high pressure port of the electric compressor with a cap to prevent oil from spilling.
- To prevent the inclusion of foreign matter, use a cap or vinyl tape to seal off the pipe connection port from the atmosphere.
6.Disconnect quick charge port connectors (1) inside motor room.

White arrow indicates : Vehicle front

- To prevent electric shock hazards, immediately wrap insulating tape around disconnected high voltage connector terminals.
7.Disconnect normal charge port connector (1) inside motor room.

White arrow indicates : Vehicle front

- To prevent electric shock hazards, immediately wrap insulating tape around disconnected high voltage connector terminals.
8.Move the water hose to a position where it will not interfere with work.
9.Remove front under cover. Refer to "FRONT UNDER COVER : Removal and Installation" See: Body and Frame\Exterior Moulding / Trim\Underbody Cover\Service and Repair\Front Under Cover.
10.Remove front wheel and tire (RH). Refer to "Removal and Installation" See: Maintenance\Wheels and Tires\Wheels\Service and Repair\Removal and Replacement\Removal and Installation.
11.Remove fender protector. Refer to "FENDER PROTECTOR : Removal and Installation" See: Body and Frame\Fender\Front Fender\Front Fender Liner\Service and Repair\Removal and Installation.
12.Remove bolt (A), and then remove compressor stay.

13.Disconnect high voltage harness connector.

- To prevent electric shock hazards, immediately wrap insulating tape around disconnected high voltage connector terminals.

- Follow the procedure below and disconnect high voltage harness connector.

14.Disconnect low voltage harness connector.

15.Remove bolts (A) from electric compressor (1).

16.Remove electric compressor (1) from the vehicle.

INSTALLATION

Note the following items, and then install in the reverse order of removal.

CAUTION:
- Be sure to reinstall high voltage harness clips in their original positions. If a clip is damaged, replace it with a new clip before installing.
- Before installing the new compressor, adjust the compressor oil level. Refer to "Lubricant Adjusting Procedure for Compressor Replacement" See: Lubricant\With Heat Pump System.
- To prevent degradation in insulation performance, use special electric compressor oil as the compressor oil.
- In order to prevent conventional PAG oil from becoming mixed in, never reuse recovered compressor oil and instead always use new oil. The use of oil including the conventional PAG oil may degrade the performance of insulation.
- To prevent performance degradation, never use a fluorescent agent in order to detect refrigerant leakage. Also be careful that a fluorescent agent never enter the oil.
- To prevent leakage of refrigerant, replace the O-ring with a new one. Apply a coat of compressor oil to the O-ring prior to installation.
- Perform a check for refrigerant leakage when charging with refrigerant. Refer to "Check Refrigerant Leakage" See: Refrigerant\Service and Repair\Check Refrigerant Leakage\With Heat Pump System.
- Set the vehicle to READY and operate the air-conditioner for at lease 1 minute with the vehicle parked to perform a break-in.
- If the compressor stay was replaced, first check that there is no dust or dirt on the surface of the compressor stay, then apply the new high voltage warning label at position (A), with the direction indicated by the arrow facing up.

White arrow indicates : Application direction of the label

- Follow the procedure below and connect the high voltage harness connector.

- After all parts are installed, be sure to check the equipotential. Refer to "Inspection" See: Inspection\With Heat Pump System.