Refrigerant Handling; Important Refrigeration Components; Expansion Valve; High Pressure Cutout Switch - DA Data Cool Series Installation, Operation And Maintanance Manual

5.4

Refrigerant Handling

The use of recovery/recycling units is required by U.S. Environmental Protection Agency (EPA) regulations.
Technicians who service and dispose of air conditioning and refrigeration equipment must recover the
refrigerant instead of venting to atmosphere.
Except for extremely small releases of refrigerant such as what occurs when disconnecting service
hoses (diminutive release), a technician who knowingly releases or vents refrigerant to the atmosphere
is in violation of these regulations. Freon purchasers must be certified technicians and have a valid
EPA certification card.
5.5

Important Refrigeration Components

5.5.1 Expansion Valve

Each refrigerant circuit has an adjustable thermo-expansion valve (TXV). These are factory adjusted to
their nominal rating. Any field adjustment should be to fine tune a system that has stabilized and already
has acceptable operating parameters.

5.5.2 High Pressure Cutout Switch

Each refrigerant circuit is protected by a high head pressure cutout switch with a manual reset button.
The cutout pressure rating for refrigerant R-22 is 400 psi. Physical location is near the compressor
which may be either in the evaporator or the condensing section.

5.5.3 Low Pressure Cutout Switch

Each circuit also contains a low suction pressure cutout switch with automatic reset. The cutout pressure
rating for this switch is 30 psi. Physical location is near the compressor which can be either in the
evaporator or the condensing section.

6.0 CONTROLS

6.1 Thermostat
Each Data Cool unit is shipped with a cooling only digital thermostat designed to provide accurate
control, displays room temperature and cooling on mode. The six buttons on the front of the thermostat
allow complete control of the equipment.
Setpoints - Raising and lowering the setpoints is accomplished by simply pushing the "Up" or "Down"
buttons. The unit will display either Fahrenheit or Celsius.
Cooling - Select the temperature by pressing the "Up" or "Down" button. The word "COOL" and the
temperature setting is Displayed for five seconds.
Fahrenheit/Celsius - Simultaneously press the "Up" and "Down" buttons to switch between Fahrenheit
and Celsius temperature setpoint.
Follow the provided wiring diagram.
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