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What is a pre-post module?

A PRE/POST module is a module that allows PRE-cooling and/or POST-cooling or -heating of the process airflow. If the process air inlet is warm and humid it might be a good idea to precool the air to remove water by condensation for the benefit of lower energy consumption. If the temperature level of the process outlet is critical for the customer, the POST-cooler or -heater provides an option of controlling the supply temperature. 

The coils are prepared to be used with various fluids including pure water and brines. Refrigeration circuits are not done by Cotes. When using a cooling fluid – the PRE/POST-module can supply a 0-10V control signal to an adjustable valve, controlling the water supply. Note that the valve itself is not included in Cotes’ scope of supply.