Cincinnati Sub-Zero ZP Series, Installation, Operation & Maintenance Manual

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OPERATING INSTRUCTIONS
46
Single Set-Point Operation - Humidity (Optional)
1. Turn the humidity system ON .
2. Use the arrow keys to navigate through the lower display and place the
arrow cursor on setpoint 2.
a. Use the

right arrow key to enter the setpoint field.
b. Use the

up and

down arrow keys to change the setpoint.
c. Use the

left or

arrow keys to exit the setpoint field.
3. When returning to temperature only operation, turn the humidity system
off. Failure to do this will result in the unit not reaching low temperatures.
4. Verify that the demineralizer cartridge is fresh. The color of the cartridge
should be dark.
WATLOW F4 CONTROLLER OUTPUTS
Control Outputs
Output 1A: Heating output. Cycles chamber heaters when heating is called for.
Output 1B: Cooling output. Cycles refrigeration valves when cooling is called for.
The compressors will run as long as cooling is called for before the time-out period
has expired. If cooling is not called for within the preset time-out period, the
compressors shut off. They will turn back on when cooling is called for.
Output 2A: Humidify output. Cycles boiler heater or atomizing nozzle of humidity system when
humidity is called for.
Output 2B: Dehumidify output. Cycles refrigeration valves when dehumidification is called for.
The compressors will run as long as dehumidification is called for before the time-
out period is expired. If dehumidification is not called for within the preset time-
out period, the compressors will shut off. The compressors will turn back on when
dehumidification is called for.
NOTE
Dry Air Purge Units Only
During humidity operation,
the dry air purge system
must be turned off.