It has a fault switch on the back side to open up the circuit to simulate a problem such as a low-pressure situation in the system. Low Pressure Residential Panel: This is an in-line low pressure control, commonly used in residential refrigeration systems as well as commercial. Also has a fault switch on the back side (verify) to open up the circuit to simulate a problem such as a low-pressure situation in the system. Low Pressure Commercial Panel: This commercial low-pressure control is used extensively on refrigeration systems, for the primary function as a safety control and system pump down. Liquid Line Solenoid Panel: Shut-off device in the liquid refrigerant side of an HVAC unit. (2 of these identical panels are provided in the TU-9240.) Commonly known as a “switching relay.” Gives the user two different control points. This is a common relay found in an electrical control system, with a normally open and normally closed set of contacts. Normally used in refrigeration systems to prevent short-cycling a compressor.ĭPDT Relay Panel (double-pole, double-throw relay). Time Delay Panel: This shows a delay scenario, useful for demonstrating a delay in time for starting a load. Also gives a diagram of the transformer, as found on an electrical or engineering print.ĮTC Control Panel: (Electronic Temperature Control): 2-stage temperature controller, could be used for heating or cooling applications. ![]() ![]() Gives user the choice of using direct wiring or plug and play. Fused on low voltage side for 5 amps and the high voltage side for 6 amps. 120V supply to the transformer, reducing the voltage to 24 volts. Transformer Panel: Power panel for the unit. All panels are powered by 24-volt except the #3009100 Transformer Panel.ĮLECTRICAL (DW = Direct Wiring via Terminal Blocks.
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