CellarPro AH12S Series, Manual, Page: 18 / 33

V12.21
18

Humidity Management: The humidity level in the cellar can be maximized by allowing
the cooling fans to run at the end of every cooling cycle. The unit is equipped with an
Off-Delay relay in the electrical enclosure and can be adjusted from 12 -390 seconds.
The recommended setting is 180 seconds (3 minutes). With this setting, at the end
of each cooling cycle the cooling unit fans will continue to run for 3 minutes.

Integrated Humidifier Option: The humidifier cannot be controlled from the
Networkable Thermostat. A separate humidistat is provided with this option that is
not networkable. It must be located inside the cellar along with the NT. Refer to the
Integrated Humidifier Owner’s Manual for detailed instructions on setting up the
humidistat. Note: The Ecobee4 NT will display the humidity level, and high/low
alarms can be set, but the humidity set point can o nly be accessed on the separate
humidistat.
Temperature Display on Cooling Unit
The temperature display provided on the cooling unit enhances the functionality of the NT for
wine cellar applications. Alarms trigger an audible alarm only at the cooling un it, the alarms
are not communicated through the NT. Note that the temperature shown on the unit mounted
controller display may differ from the NT display due to the different locations of the
temperature measurements and slower temperature response of NT devices. If there is a
large difference between the two, it may indicate that the NT is not in a good location.
Relocate closer to the return air stream in an area that has good airflow.

The “Set” button has no effect since the set point is managed by the NT. The
controller is programmed to fixed value of SET=4 5 to provide freeze protection. If the
unit mounted temperature probe records an inlet air temperature below 4 5°F, the
Dixell controller will shut off the compressor overriding a call for coolin g from the NT
thermostat.

The following parameters and functions are not available with the NT configuration:
HY, FON, SET, HES, Quick Chill and Energy Saver.

A factory preset start up delay of 3 minutes is enabled when power is first supplied to
the unit.

The defrost cycle will be managed automatically. When the cooling unit is in defrost,
“DEF” is shown on the display. Defrosts are time initiated, temperature terminated,
with a factory default of 1 hour (idF=1). With this setting, every hour the evaporator
will go into air defrost mode, with fan on/compressor off. When the coil is clear of
frost the defrost will terminate, followed by a 3 minute off cycle delay. For installations
where there is minimal frost loading, the defrost frequency can be changed by
adjusting the Dixell parameter “idF”. The values are in hours, for example to change
the defrost frequency to every 4 hours, set idF=4.

The power button can be used to turn
the controller to the “OFF” position. When the
display reads “OFF”, the compressor cannot be energized, however the NT still has
24VAC power and may continue to operate the fan, heater, and humidifier .
To
completely shut down the system, turn off both the cooling unit and the NT, or
disconnect power to the cooling unit.