Daikin EWAQ016CAW Installation And Operation Manual

Daikin EWAQ016CAW Installation And Operation Manual Manual pdf 30 page image

12 OperationInstallation and operation manual30EWAQ016~064CAW + EWYQ016~064CAWPackaged air-cooled water chiller4P489435-1B – 2017.10INFORMATION▪ flashes during setback operation.▪ While room temperature setback function is active,leaving water setback operation is also performed (see"To switch space cooling on/off using leaving watertemperature control" on page 29).▪ Do not to set the setback value too low, especiallyduring colder periods (e.g. winter time). It is possiblethat the room temperature cannot be reached (or it willtake much longer) because of the big temperaturedifference.The setback function provides the possibility to lower the roomtemperature. It can be activated e.g. during the night, becausetemperature demands during night and day are not the same.To switch space heating on/off using leaving watertemperature controlIn this mode, heating will be activated as required by the watertemperature setpoint. The setpoint can be set manually or throughthe schedule timer.1 Press to switch space heating ( ) on/off.Result: and the corresponding actual room temperaturesetpoint appear on the display. The operation LED lights up.2 Set the desired leaving water temperature using and. In order to avoid overheating, space heating cannotbe used when the outdoor ambient temperature rises above acertain temperature (see "12.1 Operation range" on page 27).INFORMATIONTemperature range for heating: 25°C~50°C (leaving watertemperature)For setup of the schedule timer function, see "12.3.6 Scheduletimer" on page 30.INFORMATION▪ When an external room thermostat is installed, thethermo ON/OFF is determined by the external roomthermostat. The remote controller is then operated inthe leaving water control mode and is not functioningas a room thermostat.▪ The remote controller ON/OFF status always haspriority over the external room thermostat!Weather dependent setpoint operationFor the automatic setback function settings, see field setting [2] in"6.2.9 Field settings on the remote controller" on page 16.3 Press 1 time to select weather dependent setpointoperation (or 2 times when the remote controller roomthermostat function is used).Result: appears on the display as well as the shift value. Theshift value is not shown if it is 0.4 Set the shift value using and .Result: will be displayed as long as the weather dependentsetpoint operation is enabled.INFORMATIONRange for shift value: –5°C~+5°C5 Press to deactivate weather dependent setpoint operation.6 Set the leaving water temperature using and .INFORMATIONDuring this operation, instead of showing the watertemperature setpoint, the controller shows the shift valuewhich can be set by the user.Automatic setback functionFor the automatic setback function settings, see field setting [2] in"6.2.9 Field settings on the remote controller" on page 16.12.3.5 Other operation modesStart up operationDuring start up, on the display means that the heat pump isstill starting up.Defrost operation ( )INFORMATIONThis function is available for heat pump units ONLY.In space heating operation, freezing of the outdoor heat exchangermay occur due to low outdoor temperature. If this risk occurs, thesystem goes into defrost operation. It reverses the cycle and takesheat from the water system to prevent freezing of the outdoorsystem. After a maximum of 15 minutes of defrost operation, thesystem returns to space heating operation. Space heating operationis not possible during defrost operation.Quiet mode operation ( )Quiet mode operation means that the unit works at reducedcompressor speed so that the noise produced by the unit drops. Thisimplies that it will take longer until the required temperature setpointis reached. Beware of this when a certain level of heating is requiredindoors.There are 3 different levels of quiet mode operation. The desiredquiet mode is set through a field setting.1 Press to activate quiet mode operation.Result: appears on the display. If the controller is set topermission level 2 or 3 (see "6.2 Making field settings" onpage 13), the button cannot be used.2 Press again to deactivate quiet mode operation.Result: disappears from the display.The actual temperatures can be displayed on the remote controller.3 Press for 5 seconds.Result: The leaving water temperature is displayed ( , / ,and blink).4 Press and to display:▪ The entering water temperature ( and / blink, andflashes slowly).▪ The indoor temperature ( and / blink).▪ The outdoor temperature ( and blink).5 Press again to leave this mode. If no button is pressed, theremote controller leaves the display mode after 10 seconds.12.3.6 Schedule timerPress to enable or disable the schedule timer ( ).Four actions per day can be programmed, making a total of 28actions per week.The schedule timer can be programmed in 2 different ways:▪ based on the temperature setpoint (leaving water temperature androom temperature)▪ based on the ON/OFF instruction.The programming method is set in the field settings. See"6.2 Making field settings" on page 13. Before programming, fill outthe form at the very end of this document. This form can help youdefine the required actions for each day.