Dehumidifier Installation

The designer should address the following issues to ensure the unit is properly installed and can be serviced and maintained.

Access Space

No Access = No Service or Maintenance. All NE series dehumidifiers have been designed to require access on only two sides. Allow a minimum of 36 inches of clearance on the sides indicated for piping and service access. Mirror access units are also available.

Pool Water Heating (Option)

Seresco has developed the simplest and most reliable water heating configuration in the industry. NE Series dehumidifiers can be equipped with water heating capabilities. The annual energy savings realized as a result of the water heating capabilities makes this unit configuration one of the most energy efficient units in all of the HVAC industry.

The NE unit requires only a fraction of the total water being circulated by the main filter system.

• The water circuit should tap off the main pool water line downstream of the main filter and upstream of the auxiliary pool water heater and chemical feeder. (See figure 20)
• An auxiliary water pump to deliver the unit's required water flow rate is recommended. This is an open system and the pool's main circulating pump can rarely accommodate additional system pressure.

Outdoor Air Cooled, Dry Cooler or Condenser Installation

This heat exchanger is used in air conditioning mode where it rejects unneeded heat from the space to outdoors. Proper installation is essential to ensure it can function as intended. Proper airflow and refrigerant piping are paramount.

• Ensure an appropriate maximum ambient air temperature has been specified.
• Ensure the unit has proper airflow. A perimeter of free area equal to its width must be provided.
• Use line sizes as specified by Seresco.
• To avoid potential seasonal system charge problems with outdoor condensers, ensure the installed line lengths are never longer than indicated on the plans and specifications.
• If the condenser is installed above the dehumidifier, ensure the hot gas line has proper oil traps.
• Contact Seresco if the condenser is installed more than eight (8) feet below the dehumidifier.
• Specify the lines be nitrogen purged while being brazed to help avoid scaling inside the pipe.

Control Wiring

The NE Series dehumidifiers have all necessary sensors unit mounted and set points pre-programmed at the factory. Remote duct heaters, outdoor air-cooled condensers, auxiliary pool water heaters and remote exhaust fans all require interfacing with the dehumidifier. The microprocessor has been programmed to control their operation. An Ethernet connection to the Internet allows all functions to be monitored by trained professionals with Seresco's WebSentry. It is the final step to ensure the facility operates trouble free.

Unit mounted sensors, all accessible via the Internet include:

• Refrigerant high pressure
• Refrigerant low pressure
• Return air temperature
• Return air relative humidity
• Pool water temperature (in and out)
• Outdoor air temperature
• Supply air temperature
• Evaporator air temperature
• Compressor superheat temperature
• Mechanical compartment temperature
• Filter condition
• Airflow
• Bypass damper setting