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ESIE06-05 Functional Control for a Standalone Unit

Part 2 – Functional Description 2–111

Restart conditions

for outlet control

version 2.1

Restart conditions after normal thermo off for software version 2.1.

After NORMAL thermo off, AND below conditions are met, the compressor can be restarted.

Start conditions:

■ Restart Prevention timer has counted down.

■ Load up signal is given by controller (thermostat).

■ Inlet water temp.during previous thermo-off + Stl A °C is < current inlet water temp. (Cooling)

■ Inlet water temp.during previous thermo-off - Stl A °C > current inlet water temperature (Heating).

Stl A : Thermostat differential value.

However, for below conditions, the start condition of inlet water temperature + Stl A °C is invalid and

the unit will start immediately if:

■ Water temperature setpoint has changed + 1 °C or more.

■ Forcing “thermo ON” order has been input from user interface.

■ Inlet thermistor has abnormality and other circuit is in alarm.

Remark:

Parameter A= Step difference value programmed in the service/thermostat menu.

Restart conditions

after forced

thermo-OFF

After FORCING Thermo-off, AND below conditions are met, the compressor can be restarted.

■ Re-start prevention timer has been counted down.

■ Outlet setpoint + (Stl A °C x B) < current outlet water temperature. (Cooling)

■ Outlet setpoint _ (Stl A °C X B) > current outlet water temperature. (Heating)

Stl A : Step difference value.

B= 2 : Differential expansion constant Changeable : 1~ 4.

FORCED thermo off

conditions:

■ Outlet water temperature below FREEZE up DIS setpoint forcing thermo-off.

■ Refrigerant temperature below REFR TEMP setpoint forcing thermo-off.