Flooded floor-type fan

Gas and liquid leg stop

Figure 10-18 illustrates flooded the floor block is intended for operation down 70F (57C). Gas-pressure-powered valves used in this circuit has solenoid pilot-operator. This has a positive effect gas or liquid loads at high or low temperatures and pressures.

To group thawing evaporators, without affecting the temperature of the total separator, gas valve is used at the end of each evaporator. Reseating the safety relief valve controller. It controls thawing pressure relief-line battery. The check valve prevents stagnation in the relief line. Built-in non-return valve prevents the crossover between neighbouring evaporators.

At high temperatures [above 25F (31C)], the use of gas non-return valve on the place of the gas solenoid valve is recommended.

Gas shut-off leg

The system shown in Fig. 10-19 similar to that shown in Fig. 10-18. However, a single gas-pressure type-powered valve is used. Excess pressure in the surge is released, valve B defrost-relief of the regulator. It is usually wide open. It becomes a control valve when solenoid is de-energized during defrost.

The unfreezing of the gas passes through the hot gas solenoid, when the voltage. Then it flows through the glove valves in line check valve to make the liquid in the evaporator of a separator.

Additional hot gas thermostat bulb can be used to sense heating bottom of the evaporator. Thus, it can act as a backup for timed defrost cycle.

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