The vacuum gauge/indicator is used to measure lower-than atmospheric pressures (vacuums). An accurate vacuum gauge is needed to measure the 500-micron deep vacuum levels that…
Air conditioning and heat pump systems are designed to operate with only refrigerant and oil circulating within them. New field-piped systems and systems that have…
Charging cylinders and scales are used to insure that the correct amount of refrigerant is measured into a system when it is being charged. Charging…
One of the most common problems encountered when servicing air conditioning or heat pump equipment is refrigerant loss due to leaks. Leaks usually result from…
Use of recovery/recycle units (Figures 1-8 and l -9) is required by U.S. Environmental Protection Agency (EPA) regulations. Technicians who service and dispose of air…
Psychrometers contain two identical thermometers, one to measure the dry bulb temperature and one to measure the wet bulb temperature. The sensing bulb of the…
Thermometers are used to measure temperatures for a variety of HVAC service tasks. The thermometer is frequently used to determine the suction line or liquid…
The gauge manifold set (Figure 1-1) is one of the most common items of service equipment. It is used to monitor the low-side and high-side…
Most run capacitors and some starting capacitors are of the oil-filled type. This is especially true for high current motors such as those used to…
The permanent-split capacitor motor has greatly increased in popularity for use in the air conditioning field over the past years. This type of split-phase motor…