4000 Series
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3460006-17_serial series 5000000
5.0
Control System:
The unit consists of heating, cooling components, fans, and control components. The major
cooling components include a compressor (heat moving component), condenser (heat rejection part),
evaporator (heat absorption part) and expansion valve (refrigerant flow control devices). Heating is
accomplished with the use of resistance heaters imbedded in the evaporator assembly. Controls
consists of a circulation fan, Watlow Ez Zone® ramping controller, RTD temperature sensors, stepper
motor control hot gas control, solid state relay and misc. other hardware.
6.0 Operation:
Control panel:
1)
POWER SWITCH
Turns the unit ON and OFF
When in the OFF position, internal control heater power will be OFF, evaporator fan will
be off, condensate evaporator pan will be off, compressors will be in pump down mode
only (1
st
stage refrigeration compressor will turn on and off automatically to remove
refrigerant from the evaporator section of the refrigeration system)
2)
MODE SWITCH
Selects the profile to be run when the CYCLE START button is pressed
There are 3 user configurable and selectable temperature profiles that can be run
3)
CYCLE COMLETE INDICATOR
Flashing indication light to signify the final step in a profile
4)
USB CONFIGURATION PORT
Female USB type B connector for interfacing with the Watlow controller to program
profile steps
EZ-Zone Configurator is the Watlow provided software for direct interface
with the controller
5)
CYCLE START PUSHBUTTON
Used to start the temperature profile as selected by the MODE switch
6)
CYCLE STOP PUSHBUTTON
Stops all operations of the unit and returns to the OFF state
All compressors, heat sources, and internal circulation fan will turn off
7)
DEFROST BUTTON (EZ1)
Soft key tied to the defrost function of the 4000 series unit
