Seresco CLASSIC NE Series, Operation And Maintenance Manual

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D – Layout and Components
D-
2

Main Blower (1) is in the main blower compartment next to the Main Electric Panel (2) and Compressor
Compartment (3).

Min Outdoor Air (OA) Opening (4) is optionally equipped with a motorized damper and filter(s). The Manual
OA Damper (5) is usually used to set proper amount of outdoor air intake.

Refrigeration coils - Evaporator (7) and Reheat (internal condenser) (8) - are located directly downstream of
the Main Filter Rack (9).
o
Evaporator Bypass Damper (10) is located next to the evaporator coil. It helps to control compressor
suction pressure by adjusting the amount of air, bypassing the evaporator.
 Space heater (11) location, if the dehumidifier is equipped with one, may vary:
o
Hot water coil is usually located directly downstream of the reheat coil;
o
Electric heater may be in the same place as the hot water coil or mounted directly on the
dehumidifier’s supply air duct connection.
o
Gas heater (duct heater or boiler package) normally is installed externally.

Compressor (13), Receiver (14) and other components are located within the Compressor Compartment (3) .
o
If the dehumidifier has the standard pool water heating option, the compressor circuit includes the
coaxial pool water heat exchanger (15) and refrigeration pool valve.
o
If the dehumidifier has the water-cooled air conditioning option (equipped with fluid cooler or
connected to external water-cooling source), the compressor circuit also includes the plate heat
exchanger (16)).
 Main Electric Panel contains Main Control Board (17), Operator Panel (18) and other electrical components.
Control System
The dehumidifier control system is composed of sensors, spread throughout the dehumidifier, Main Control
Board , Operator Panel and other electric components, located in the Main Electric Panel.
Temperature Sensors (Pic. D.2):
a) Temperature sensors (thermistors) are used to monitor
various temperatures (air, water, compressor, etc.);
b)
Combo sensor is used to monitor air temperature and
humidity.
Compressor operation is monitored with pressure sensors (Pic. D.3):
c)
Pressure Transducers (as main operational control and safety) and
d)
Pressure Switches (fast-reacting backup safety).
Sensors and safeties approximate location is shown on Pic. D.4 .
b
a
c
d
Pic.D.3
Pic. D.2