In Fig. 15-13 a typical, simplified, thermostatic expansion valve is shown. In the type of equipment being serviced, this type of metering device is most…
Author: sam
The evaporator coil is the component in the system that absorbs heat from the conditioned space. It is similar in design to the air-cooled condensing…
When discussing the air-cooled condensers, it was mentioned that the ambient air temperature would affect the efficiency of the unit. The higher the ambient reaches…
The condenser is a length of tubing with fins placed perpendicular to the tubing. Figure 15-2 shows a typical air-cooled condenser coil. This type of…
The crankcase heater is a resistive heater that either mounts around the bottom of the body, or is an insertion type that slips into a…
In certain installations where the evaporator section was installed in the attic, an auxiliary condensate drain is used. If the main condensate drain pan should…
These are shown in Fig. 10-6 and are commonly used in electric furnaces to stage heat. In most residential units, resistive heat strips are placed…
This switch is seen primarily in commercial units, and in my opinion it is a valuable safety switch for both heating and cooling. It is…
In the event a limit switch should fail, there is a back-up protection called fusible links. Unlike the regular fuse you have worked with, the…
In Fig. 10-1 an electric strip heater assembly is shown. The limit switch is found in the electric furnace as it is in the fossil…