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ICE A/C & HEX Combo Unit I&O Manual 07/2020 Rev.1
3.2 Operating control mode
3.2.1 Cooling Control
Cooling startup point = cooling stop point + cooling sensitivity. When the cabinet
internal temperature exceeds the cooling startup point, cooling will start; when the
cabinet internal temperature is lower than the cooling stop point, cooling will stop.
Parameter
Default Value Setting Range Units Description
CoolSP
35
[15 ~ 55]
ºC
The temperature point at
which cooling stops
CoolΔT
5
[1 ~ 10]
ºC
The sensitivity of the
temperature control
INHT
65
[30 ~ 70]
ºC
Internal high temperature
alarm point
Table 2. Cooling Set Point Parameters
3.2.2 Heat Exchanger and Cooling
The heat exchanger and the compressor of the Combo Unit adopt grading interlocking
control. The heat exchanger is defined as the first stage heat dissipation and the
compressor is defined as second stage cooling. According to the cabinet internal/
external temperatures, dividing into four operating modes:
1.
Internal fan running
After the Air Conditioner with Heat Exchanger startup 30s, internal fan running.
2.
Heat Exchanger running
When the cabinet internal temperature exceeds 95ºF (35ºC), and external ambient
temperature is more than 39ºF (4ºC) lower than the cabinet internal temperature,
the internal/external fan are started, entering the heat exchanger mode.
Air Conditioner running
When the cabinet internal temperature rise continuously to 104ºF (40ºC), the
compressor will be started. If the external ambient temperature is less 36ºF (2ºC)
lower than the cabinet internal or the external ambient temperature is higher than
the cabinet internal, only air conditioner will be started. And when the cabinet
internal temperature is lower than 95ºF (35ºC), the compressor and external fan are
shut down, and the air conditioner stops.
Heat exchanger and Air Conditioner running.
When the cabinet internal temperature exceed 104ºF (40ºC), the compressor will
be started. If the external ambient temperature is more 36ºF (2ºC) lower than the
cabinet internal, heat exchanger will be started too, entering both running mode.
When the cabinet internal temperature reduces to 95ºF (35ºC), the compressor and
external fan are shut down, and the air conditioner stops.
3.2.3 Heating (Optional)
The Combo Unit provides an optional heating function.
The heating function works when the cabinet internal temperature is lower than 50ºF
(10ºC), and when the cabinet internal temperature is exceeds 59ºF (15ºC), the heater
stops.(The indoor fan will not stop when heater is running).
3.3 Alarms
The Combo Unit provides the following alarm information; monitoring software can see
the detailed alarm information. When there is alarm triggered, the interface display the
relevant information, showed as Figure 5.
