6 ConfigurationInstallation and operation manual20EWAQ016~064CAW + EWYQ016~064CAWPackaged air-cooled water chiller4P489435-1B – 2017.10The compensated temperature (= measured temperature pluscompensation value) is then used to control the system and will bedisplayed in the temperature read-out mode.[9‑00] Leaving water temperature compensation value forheating operation[9‑01] Leaving water thermistor auto corrective functionThis function will take into account the outdoor ambient conditionsand correct the measured value which will be used for the logic.E.g. when the ambient temperature is high during cooling mode, thelogic will correct the measured value of the leaving water thermistorto a lower value to take into account influence of high ambienttemperatures in the measurement.[9-02]This setting is not applicable.[9‑03] Leaving water temperature compensation value forcooling operation[9-04]This setting is not applicable.[A] Option setup[A-00]This setting is not applicable.[A-01]This setting is not applicable.[A‑02] Return water temperature undershoot valueThis setting makes it possible to set the allowable undershoot whenoperating the unit during heating THERMO ON/OFF condition.The unit will go in THERMO ON only if the return water temperature(RWT) goes below the setpoint minus the differential temperature:Thermo ON: RWTThe setting [A‑02] has a variability range from 0 to 15 and the step is1 degree. The default value is 5, meaning that the differentialtemperature default value is 3.5.[A‑03] Leaving water temperature overshoot/undershoot valueThis setting makes it possible to set the allowable overshoot(heating)/undershoot (cooling) when operating the unit duringleaving water control.[A‑04] Glycol concentration settingThis setting is only applicable for units with a low temperaturecooling option.When changing this setting, the freeze prevention parameters will bechanged in relation with the glycol concentration.[A‑04] Description0 30% glycol, minimum leaving water=0°C1 40% glycol, minimum leaving water=–10°CCAUTIONGlycol concentrations lower than the set parameter willcause the fluid to freeze.[b] Settings are not applicable[C] Leaving water temperature limitsThis setting is used to limit the selectable leaving water temperatureon the remote controller.[C‑00] Maximum leaving water setpoint in heating operation[C‑01] Minimum leaving water setpoint in heating operation[C‑02] Maximum leaving water setpoint in cooling operation[C‑03] Minimum leaving water setpoint in cooling operationThis depends on field setting [A‑04].[C-04]This setting is not applicable.[d] Settings are not applicable[E] Service mode[E‑00]This setting is not applicable.[E‑01]This setting is not applicable.[E‑02]This setting is not applicable.[E‑03]This setting is not applicable.[E‑04] Pump only operation (air purge function)When installing and commissioning the unit it is very important toremove all air from the water circuit.This field setting operates the pump to improve air removal from theunit without actually operating the unit. The pump will run for10 minutes, stop 2 minutes, etc.[E‑04] Description0 (default) Normal operation of the unit1 Automatic air purge operation during108 minutes2 Automatic air purge operation during48 minutes[F] Option setup[F‑00] Return water temperature overshoot valueThis setting makes it possible to set the allowable overshoot whenoperating the unit during cooling THERMO ON/OFF condition.The unit will go in THERMO ON only if the return water temperature(RWT) goes above the setpoint plus the differential temperature:Thermo ON: RWTThe setting [F‑00] has a variability range from 0 to 15 and the step is1 degree. The default value is 5, meaning that the differentialtemperature default value is 3.5.6.3 Switching between cooling andheatingSwitching the unit between cooling and heating can be done in 2different ways. This will depend on how the temperature iscontrolled, i.e. based on room temperature or based on leavingwater temperature.If the unit control is based on room temperature (external roomthermostat or remote controller room thermostat), switching betweencooling and heating is done through the remote controller by pushingthe cooling/heating button.If the unit control is based on leaving water temperature, we suggestusing the ABC terminals on the outdoor unit (heat pump units only).The location of the terminals is shown in the following figure.
