FAQ

WHAT REFRIGERANT DOES MY SYSTEM USE?

All Restomod Air systems use exactly 24oz. of R134a.

HOW MUCH REFRIGERANT DOES MY SYSTEM USE?

All Restomod Air systems use exactly 24oz. of R134a. When can charging most common can sizes are 12oz. each, be certain to check the can sizes before charging.

DOES MY A/C COMPRESSOR HAVE OIL ALREADY?

If you purchased the compressor from Restomod Air it already has 7 oz. of PAG oil. If you suspect that your compressor may not have oil that you purchased elsewhere, we recommend draining the compressor and refill as needed per your compressors requirements.

CAN I MOUNT MY A/C COMPRESSOR ON THE SIDE SO THE HOSE CONNECTIONS AREN'T STRAIGHT UP?

Yes, you can rotate the A/C compressor so that the compressor is on it side, but NOT upside down. With the compressor fittings straight up (12 o’clock) you can rotate in either direction 90 degrees as long as the fill plug (looks like a bolt head on the compressor body) is not rotated more than 90 degrees. (3 o’clock or 9 o’clock position).

HOW MANY O-RINGS DO I PUT ON EACH FITTING CONNECTION?

Each connection on the A/C system will need to have (1) green o’ring to make a positive seal. Make certain to put two drops of o’ring oil (white tube supplied in kit) on each o’ring before tightening fittings, this will allow the o’ring to not tear during tightening of fitting.

When installing o-rings on the hose connections, be certain the o-ring is properly sealed. Also check for sharp edges on the seat. We recommend a drop or two of mineral oil on the o-ring and the seat. If installed wrong, or the seat has a sharp burr, the o-ring can be cut. A portion of the o-ring can plug the expansion valve.

CAN I PUT A BELT ON THE A/C COMPRESSOR EVEN THOUGH I HAVE NOT CHARGED THE SYSTEM?

Yes, you can put a belt on the system as long as you have not connected the clutch wire found on the compressor. Without 12V to this wire on the compressor the magnetic clutch is not engaged therefore the compressor acts simply as an idler pulley.

DOES IT MATTER HOW THE CONDENSER IS MOUNTED TO THE FRONT OF THE RADIATOR?

Yes, the condenser MUST be mounted with the LARGER (#8) connection on TOP. Failure to do so will prevent the A/C System from functioning correctly. Refrigerant flows from the compressor to the top connection of the condenser down to the bottom connection. This allows the refrigerant to change from gas from to a liquid from needed for the system to operate. We also recommend that the condenser is about an inch away from the radiator.

CONDENSER MOUNTING
CONDENSER LARGE AND SMALL CONNECTIONS

DOES IT MATTER WHERE THE DRIER IS MOUNTED?

Drier needs to be mounted in a location where hoses can reach because refrigerant hoses from the condenser must connect to it. Drier mounts vertical with connections on top. Threaded connection labeled “IN” will connect to the lower connection of the condenser.

DRIER TOP

HOW DO I ROUTE HOSES IN THE ENGINE COMPARTMENT?

ENGINE COMPARTMENT HOSE ROUTING

THERE ARE TWO MICRO SWITCHES ON THE EVAPORATOR UNIT. WHICH IS WHICH?

In most applications, the micro switch that is closest to the driver’s right foot is the a/c clutch micro switch.

DOES IT MATTER WHERE THE WATER VALVE IS LOCATED?

No, the water valve can be located any where in the return heater hose. Placing the water valve in the lower of the heater core outlets can aid in concealing it from view.

WHAT IS A PRESSURE SWITCH AND WHERE IS IT LOCATED?

The pressure switch is a safety switch; it helps to avoid compressor failures. In the event the system loses its refrigerant charge, the electrical power to the compressor will be interrupted. In the event of extremely high pressure, the switch will also interrupt the electrical power to the compressor.

WHAT IS THE DISCHARGE HOSE?

The discharge hose (#8) is also called the high pressure hose. The hose is the smaller of the two fittings on the compressor. The hose/tube can be traced to the upper fitting on the condenser. Although the hose has a service port located on it, the port will only be used in diagnosing the system. Once the system has been charged, the hose contains the refrigerant in a high pressure gas state. Caution should be used when working with or around the hose.

WHAT IS THE SUCTION HOSE?

The suction hose (#10) is also called the low pressure hose. The hose is the larger of the two fittings on the compressor. The hose can be traced back to the firewall. The hose also has a service port located on it. This is the port that will be used to service and charge the system.

WHICH IS THE SMALLER HOSE?

The smaller (#6) hose is the hose/tube that starts at the lower fittings of the compressor then is connected to the drier. From the drier, the hose/tube will be connected to the smaller of the two fittings located on the firewall. This hose contains the refrigerant in a high pressure liquid state. There should not be a service port on this hose. Once the system is charged, caution should be used while working around this hose.