The inlet pipe bringing high-pressure gas from the compressor must enter at the top of the condenser, and adjacent piping should slope in the direction of flow so that oil droplets and any liquid refrigerant which may form will con­tinue in the right direction and not back to the compressor.

The outlet pipe must always be from the lowest point, but may have a short internal upstand so that any dirt such as pipe scale or metal swarf will be trapped and not taken around the circuit.

Condensers for ammonia systems may have an oil trap, usually in the form of a drain pot, and the liquid outlet will be above this.

Water connections to a shell-and-tube condenser must always be arranged so that the end covers can easily be removed for inspection, cleaning, and repair of the tubes. Heavy end covers require the use of lifting tackle, and supports above the lifting points should be provided on installation to facilitate this work.

Condensers contain pressurized refrigerant and where they exceed certain volumes they will be subject to the requirements of the Pressure Vessel Directive (PED) and EN378. Manufacturers will be aware of these requirements, and pro­prietary products will be correctly equipped.

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