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Recharging

1. The action of forcing electrical current into a battery, reversing the chemical reaction between the plates and electrolyte. 2. Filling an air-conditioning system with refrigerant and repairs are made.

Reciprocating

A back-and-forth, up-and-down, or to-and-fro motion, such as that of a piston in a cylinder.

Reciprocating Engine

A powerplant in which the piston move in a reciprocating motion.

Reciprocating Motion

The motion of an object between two limited positions in a straight line back and forth or up and down.

Recirc Door

An abbreviation form of recirculate door.

Recirculate

1. To reuse 2. To circulate a fluid or vapor over and over again.

Recirculate Door

A door in the plenum that regulates the amount of reticulated air flow.

Recirculating Ball

A worm and gear steering assembly with balls between the worm and sector to reduce friction.

Recirculating-ball Steering Gear

A low-friction steering gear box having a worm-gear meshing with a cross shaft sector through about 40 recirculating balls that travel in matching grooves inside the ball nut and outside the worm shaft which acts as a rolling thread.

Recirculating-ball-and-nut Steering Gear

A type of steering gear having a nut meshing with a worm gear sector, with balls that circulate between the nut and worm threads.

Reclaim

To process used refrigerant to new product specification by means that may include distillation. This process requires that a chemical analysis of the refrigerant be performed to determine that appropriate product specifications are met.

Recombination Battery

Sometimes called dry-cell batteries because they do not use a liquid electrolyte solution.

Recon

A short term for reconditioned.

Reconditioned

A used part that has been repaired, tested, and determined to be in good order. Also known as recon.

Record Length

The number of waveform points used to create a record of a signal.

Recovery

The recovery of refrigerant is to remove it, in any condition, from a system and to store it in an external container without necessarily testing or processing it in any way.

Recovery Cylinder

A cylinder for the storage of used R-12 and/or R-134a must meet DOT specification 4BA-300, characterized by a combined liquid/vapor valve located a the top. A recovery cylinder should be painted gray with a yellow shoulder.

Recovery/recycle Systems

A term often used to refer to the circuit inside the recovery unit used to recycle and/or transfer refrigerant from the air-conditioning system to the recovery cylinder.

Recovery/recycle Unit

A term used to identify the complete unit used to recover and/or recycle refrigerant from the air conditioning system.

Recreational Vehicle (RV)

A motor-driven, van-like vehicle having sleeping, food preparation, and bathroom facilities.