Operating Your System; Thermostat Operation - iceqube EX series Operation And Installation Manual

Once the Ice Qube TMS has been installed onto the enclosure and the power cable has been attached to a
properly grounded electrical connection with adequate voltage and current supply, the unit is ready for
operation. As soon as electrical power is supplied to the Ice Qube TMS, the air conditioner will begin to
operate.
On the rear or enclosure side of the cooling system is the thermostat. The thermostat is responsible for
control and operation of the vapor-compression refrigeration system and air movers. When power is
supplied to the system, the cooling system will begin to operate if the temperature is at or above the set
point of the thermostat. At this set point temperature, the cold and warm air movers, along with the
compressor will begin operation. As the temperature inside the enclosure cools to the thermostat off
temperature, the thermostat will signal the compressor and air movers to stop operation.
The purpose of the thermostat (T675A) is to cycle on and off the cooling system as required from the
heat produced by the equipment within the enclosure to prevent heat fatigue thus extending the life of
the electronic equipment. The thermostat is located on the enclosure side of the air conditioner below
the warm air return. The thermostat temperature sensing bulb is located in the warm stream of air
returning to the air conditioner from the enclosure.
On the face of the thermostat, you will see an adjustment knob within a temperature range of -15 to
35°C (5 to 95°F). To adjust the operating temperature of the thermostat, gently turn the knob until the
pointer is aligned with the desired temperature of the enclosure. This is the temperature at which the
cooling system will begin cooling.
The thermostat has a factory set differential of 2.8°C (5°F). The unit will stop cooling when the
enclosure temperature is 2.8°C (5°F) below the cooling on setting, indicated by the pointer. The unit will
automatically begin to cool again when the internal temperature of the enclosure reaches the cooling on
set point.
Ex: Set Point 25º C (77º F)
22.2º C (72º F)

Operating Your System

Thermostat Operation

Cooling on temperature
Cooling off temperature
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Rev. 1