Tags: Level-Master Control

HVAC Level-Master Control Oil return

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All reciprocating compressors will allow some oil to pass into the discharge line along with the discharge gas. Mechanical oil separators are used extensively. However, they are never completely effective. The untrapped oil passes through the condenser, liquid line, expansion device, and into the evaporator. In a properly designed direct-expansion system, the refrigerant velocity in …

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HVAC Level-Master Control Installation

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HVAC Level-Master Control Installation

The level-master control is applicable to any system that has been specifically designed for flooded operation. The valve is usually connected to feed into the surge drum above the liquid-level. It can feed into the liquid leg or coil header. The insert bulb can be installed directly in the shell, surge drum, or liquid leg …

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HVAC Level-Master Control

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HVAC Level-Master Control

The level-master control is a positive liquid-level-control device suitable for application to all flooded evaporators (see Fig. 11-45). The level-master control is a standard thermostatic-expansion valve with a level-master element. The combination provides a simple, economical, and highly effective liquid-level control. The bulb of the conventional thermostatic element has been modified to an insert-type bulb …

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