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Low-temperature ceiling fan

Low-temperature liquid circulation system shown in Fig. 10-22 uses multiple controls. During the cooling cycle, в„– 1 pilot valve opens and в„– 2 pilot valve is closed, holding the gas solenoid valve is wide open. This allows the flow of liquid through the voltage liquid-solenoid valve from the rebreather, and then through the circuit of the block. Built-in check valve is installed between the drain-pan coil header and suction line prevents drainage of fluid in the drain-pan coil.

To defrost, liquid solenoid valve is closed. Number 1 solenoid pilot de-energized. Number 2 electromagnetic opening, closing the throttle built-in solenoid valve tightly. Hot gas solenoid is energized. This allows the distribution of hot gas through the drain-pan coil, in line check valve, the top of the intake manifold, and the coil. The gas comes from the bottom of the fluid header.

Check valve prevents the flow of high-pressure gas in the liquid line. Thus, natural gas is the liberation from the safety relief valve regulator (B). This is important to maintain pressure in the evaporator to facilitate quick, efficient defrosting.

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