Daikin VRVIII Operation Manual

Also see for VRV III: Installation manual Operation manual Service manual Operation manual Technical data

Daikin VRVIII Operation Manual Manual pdf 11 page image

HXHD125A7V1BVRVIII system indoor unit4PW62585-1 – 11.2010Operation manual10ReheatThis mode will prevent the domestic hot water from cooling downlower than a certain temperature. When enabled the indoor unit willdeliver hot water to the domestic hot water tank when the reheatminimum value is reached. The domestic water heating will continueuntil the reheat maximum temperature is reached.Selecting reheat operation for domestic water heating1 Use the w button to enable reheat operation.The w icon will display.2 Press the w button again to disable reheat operation.The w icon disappears.The reheat minimum and reheat maximum temperature set pointsare field settings. Refer to "5.12. Field settings" on page 18 for adetailed description how to set one or more field settings.■ [b-00] Set point: reheat minimum temperature (see figure"Domestic water heating modes" on page 8).■ [b-01] Set point: reheat maximum temperature (see figure"Domestic water heating modes" on page 8).Disinfection operationThis mode will disinfect the domestic hot water tank by periodicallyheating the domestic water to a specific temperature. During theoperation of this mode the w icon will be blinking rapidly with 0.5second intervals.The disinfection temperature set point is a field setting as are theretention time, day and hour. Refer to "5.12. Field settings" on page 18for a detailed description how to set one or more field settings.■ [4-00] Status: defines whether the disinfection function is turnedON (1) or OFF (0).■ [4-01] Operation interval: day of the week at which the domesticwater should be heated.■ [4-02] Start time: time at which the disinfection operation isstarted.■ [5-00] Set point: Disinfection water temperature to be reached(see figure "Domestic water heating modes" on page 8).■ [5-01] Duration: time period defining how long the disinfectionset point temperature should be maintained.Even if all schedule timers are de-activated and there is no reheatfunction active, the disinfection function will operate if a domestic hotwater tank is installed and field setting [4-00] is set to ON.5.5. Other operation modesStart up operation (d)During start up, the d icon displays, indicating that the heatpump is starting up and is not working in a steady state condition.Defrost operation (d)In space heating operation or domestic water heating operation,freezing of the outdoor heat exchanger may occur due to low outdoortemperature. If this risk occurs, the system goes into defrostoperation. During defrost operation, space heating or domestic hotwater operation is not possible.Quiet mode operation (s)Quiet mode operation means that the indoor unit works at reducedcompressor speed so that the noise produced by the indoor unitdrops. This implies that it will take longer till the required temperatureset point is reached. Beware of this when a certain level of heating isrequired indoors.Selecting quiet mode operation1 Use the s button to activate quiet mode operation.The s icon displays.If the controller is set to permission level 2 or 3 (refer to "Fieldsettings" in the installation manual), the s button is notoperable.2 Press the s button again to deactivate quiet mode operation.The s icon disappears.There are 3 different levels of quiet mode operation. The desiredquiet mode is set through a field setting. Refer to "5.12. Fieldsettings" on page 18 for a detailed description how to set one or morefield settings.■ [8-03] Status: defines the level of low noise operation (quietmode).INFORMATIONRemark that the w icon will be continuously lit as longas the reheat function is enabled. It is not possible tosee when the indoor unit is reheating the domestic hotwater tank.INFORMATIONRemark that pushing the y button has no influence onthe domestic water heating. Domestic water heating is onlyswitched on or off by means of the w button and/ordisabling the storage schedule timer.INFORMATIONRemark that the w icon will only be blinking duringeffective operation.During the operation it is always possible to cancel thedisinfection function by pushing the w button once.Be aware that after pushing the w button, it is possiblethat the permanently lit w icon still displays, meaning thatthe reheat function is enabled.NOTICEIf a domestic hot water tank is installed, the disinfectionfunction is enabled by default.